JP6323410B2 - Structure partial analysis model generation apparatus and method, and structure collision analysis method using partial analysis model generated by structure partial analysis model generation method - Google Patents

Description

  The present invention relates to a structure partial analysis model generation apparatus and method used for automobile vehicle collision analysis, and a structure collision analysis method using a partial analysis model generated by the structure partial analysis model generation method.

Conventionally, a collision analysis of an automobile vehicle by computer simulation is performed using a full car model of the entire vehicle. However, since the number of parts included in the full car model is large, a large amount of calculation time is required.
In recent years, various collision safety standards have been added to automobile vehicles, and it is desired to perform a feasibility study (FS) for examining countermeasures for satisfying these collision safety standards. However, performing FS examination by computer simulation using a full car model requires a large amount of calculation time as described above, and is inefficient.
Then, like the technique currently disclosed by patent document 1, extracting and analyzing a part of motor vehicle is performed.

JP 2010-49319 A

  The technique disclosed in Patent Literature 1 is intended to analyze only the vehicle anti-collision reinforcement material that is a part of the vehicle, but does not consider the deformation state of the entire vehicle. The accuracy is low. Also, there is no clear standard for the range of the vehicle to be analyzed, and the analysis accuracy varies depending on how to set the range to be analyzed. In other words, even if the result obtained by analyzing a part of the range of the vehicle has a small difference from the result obtained by using the full car model and sufficient analysis accuracy is obtained, the vehicle to be analyzed Or changing the collision mode may change the method of setting the range to be analyzed, which may reduce the analysis accuracy.

  The present invention has been made to solve the above-described problems, and provides a partial analysis model generation apparatus and method for a structure that always has the same level of analysis accuracy as that for the entire structure. For the purpose. Another object of the present invention is to provide a structure collision analysis method capable of reducing the calculation time required for collision analysis by using a partial analysis model generated by the structure partial analysis model generation apparatus or method. .

(1) A partial analysis model generation apparatus for a structure according to the present invention includes a plurality of parts modeled by elements (mesh) and nodes, and includes analysis conditions in an entire structure model having element information and node information. A global analysis model generating means for setting the boundary condition and generating an overall analysis model; and a collision analysis is performed on the global analysis model generated by the global analysis model generating means to analyze each element and / or each node Collision analysis means for acquiring data and the same shape as the overall analysis model in the overall analysis model generation means, and element information and node information are associated with element information and / or node information of the overall analysis model. Analysis data mapping means for mapping the analysis data acquired by the collision analysis means to elements and / or nodes of the structure evaluation model; An element and / or node whose value of the analysis data mapped to the structure evaluation model is greater than or equal to a predetermined threshold is extracted from the structure evaluation model, and based on a region including the extracted element and / or node A structure partial model generating means for generating a structure partial model, and analysis conditions and boundary conditions corresponding to the collision analysis by the collision analysis means are set in the structure partial model generated by the structure partial model generating means And partial analysis model generation means for generating a partial analysis model.

(2) In the device described in (1) above, the structure partial model generation means generates a structure partial model composed of the whole part having the extracted elements and / or nodes. Is.

(3) In the structure described in (1) above, the structure partial model generation unit sets a region including the extracted elements and / or nodes, and interpolates the boundary of the region to obtain a structure partial model. The partial analysis model generation means sets an analysis condition corresponding to a collision analysis by the collision analysis means to the structure partial model generated by the structure partial model generation means, and the interpolated A partial analysis model is generated by setting a boundary condition at the boundary.

(4) The structure partial analysis model generation method according to the present invention is a computer in which the following steps are performed. The method includes a plurality of parts modeled by elements (mesh), element information and nodes. A global analysis model generation step for generating an overall analysis model by setting analysis conditions and boundary conditions to the overall structure model having information, and performing a collision analysis on the overall analysis model generated in the overall analysis model generation step, Collision analysis step for obtaining analysis data for each element and / or node, and the same shape as the whole structure model in the whole analysis model generation step, and element information and node information are elements of the whole structure model Analysis data acquired in the collision analysis step in the structure evaluation model associated with information and / or node information An analysis data mapping step for mapping (mapping), and extracting elements and / or nodes whose analysis data mapped to the structure evaluation model in the analysis data mapping step is equal to or greater than a predetermined threshold, And / or a structure partial model generation step for generating a structure partial model to be subjected to collision analysis based on a region including a node, and the structure partial model generated in the structure partial model generation step includes the collision And a partial analysis model generation step of generating a partial analysis model by setting analysis conditions and boundary conditions corresponding to the collision analysis in the analysis step.

(5) In the structure described in (4) above, the structure partial model generation step generates a structure partial model configured by the whole part having the extracted elements and / or nodes. Is.

(6) In the structure described in (4) above, the structure partial model generation step sets a region including the extracted elements and / or nodes, and interpolates a boundary of the region to obtain a structure partial model. The partial analysis model generation step sets an analysis condition corresponding to a collision analysis by the collision analysis unit in the structure partial model generated by the structure partial model generation unit, and the interpolated A partial analysis model is generated by setting a boundary condition at the boundary.

(7) Impact Analysis method of the structure according to the present invention uses the above SL (4) to (6) structural moiety analysis model partial analysis model generated by the generation method according to any one of the structures The collision analysis is performed by a computer, and the collision analysis is performed by changing the analysis conditions set in the partial analysis model.

  In the present invention, an entire analysis model is generated by setting analysis conditions and boundary conditions to an entire structure model that is composed of a plurality of parts modeled with elements (mesh) and nodes, and has element information and node information. A global analysis model generating means, a collision analysis means for performing a collision analysis on the global analysis model generated by the global analysis model generating means, and acquiring analysis data for each element and / or node, and the global analysis A structure evaluation model having the same shape as the whole structure model in the model generation means and element information and / or node information associated with element information and / or node information in the whole analysis model is added to the structure analysis model by the collision analysis means. Analysis data mapping means for mapping (mapping) the acquired analysis data, and the analysis data mapped to the structure evaluation model A structure partial model generating unit that extracts an element and / or a node having a predetermined threshold value or more from the structure evaluation model and generates a structure partial model based on a region including the extracted element and / or node And a partial analysis model generation means for generating a partial analysis model by setting analysis conditions and boundary conditions corresponding to the collision analysis by the collision analysis means to the structure partial model generated by the structure partial model generation means With this, it is possible to generate a partial analysis model having an analysis accuracy equivalent to that of the analysis model for the entire structure based on a unique reference.

1 is a block diagram of a partial analysis model generation device for a structure according to Embodiment 1 of the present invention. It is explanatory drawing explaining the whole analysis model of the structure which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows an example of the collision analysis result by the whole analysis model which concerns on Embodiment 1 of this invention. It is an example of the contour figure of the displacement obtained by the analysis data mapping means concerning Embodiment 1 of the present invention. It is a figure which shows the element extracted by the structure partial model production | generation means which concerns on Embodiment 1 of this invention. It is a figure which shows the structure partial model produced | generated by the structure partial model production | generation means based on Embodiment 1 of this invention. It is explanatory drawing explaining the partial analysis model of the structure which concerns on Embodiment 1 and Embodiment 2 of this invention (the 1). It is explanatory drawing explaining the partial analysis model of the structure which concerns on Embodiment 1 and Embodiment 2 of this invention (the 2). It is a flowchart which shows the flow of a process of the partial analysis model generation method of the structure which concerns on Embodiment 1 of this invention. It is explanatory drawing explaining the partial analysis model used for the comparative example in the Example. It is a figure which shows the result of this invention example and a comparative example in an Example.

[Embodiment 1]
The structure partial analysis model generation method according to Embodiment 1 of the present invention is performed using the structure partial analysis model generation apparatus 1 (hereinafter, simply referred to as “partial analysis model generation apparatus”) according to the present invention. It is. First, the partial analysis model generation apparatus 1 will be described below with reference to FIGS.
The structure partial analysis model generation apparatus 1 and method according to Embodiment 1 of the present invention are applied to automobile collision analysis.

The partial analysis model generation device 1 according to the first embodiment is configured by a computer such as a PC (personal computer), and includes a display device 3, an input device 5, a main storage device 7, an auxiliary storage device 9, and an arithmetic processing unit 11. Have.
A display device 3, an input device 5, a main storage device 7, and an auxiliary storage device 9 are connected to the arithmetic processing unit 11, and each function is performed according to instructions from the arithmetic processing unit 11.
Hereinafter, each configuration and function of the partial analysis model generation device 1 will be described in detail.

The display device 3 is used for displaying analysis results and the like, and includes a monitor or the like.
The input device 5 is used for inputting analysis conditions and boundary conditions by an operator, and includes a keyboard, a mouse, and the like.
The main storage device 7 is composed of a RAM or the like, and is used for temporary storage of data used in the arithmetic processing unit 11 and arithmetic operations.
The auxiliary storage device 9 is configured by a hard disk, an SSD (Solid State Drive), or the like, and is used for storing / storing files such as programs and analysis data used for analysis.

The arithmetic processing unit 11 is configured by a CPU (central processing unit) of a computer, and each means described below is realized by the CPU executing a predetermined program.
The arithmetic processing unit 11 includes an overall analysis model generation unit 13, a collision analysis unit 15, an analysis data mapping unit 17, a structure partial model generation unit 19, and a partial analysis model generation unit 21. .
Hereinafter, each means of the arithmetic processing unit 11 will be described in detail.

<Whole analysis model generation means>
The overall analysis model generating means 13 is composed of a plurality of parts modeled by elements (mesh) and nodes, and sets the analysis conditions and boundary conditions to the overall structure model having element information and node information, and performs overall analysis A model is generated.

The entire structure model is generated by dividing the structure into elements (mesh) based on shape data such as 3D CAD data, and is composed of a plurality of elements. Element information, node information, and the structure It has component information of components to be configured.
The element information includes an element type, a node number constituting the element, and the like. The node information includes the coordinate value of the node. Further, the arrangement and number of elements generated by element division may be arbitrarily set.
The part information includes a material of each part, a combination of parts, and the like.

The analysis conditions set in the overall structure model include initial conditions, material characteristics (material types), collision modes, contact conditions, and the like.
For example, frontal full lap collision, frontal offset collision, frontal micro lap collision, side collision, roof crash, etc., which collide with the whole structure model according to each collision type. Set the colliding object model.
The boundary conditions set for the overall structure model include a displacement constraint condition and a speed condition.

  FIG. 2 shows an example of the overall analysis model 41 for a roof crash of an automobile vehicle. 2 and the overall analysis model 41, the overall structure model 43, and the like in this specification are illustrated with elements omitted.

The entire structure model 43 is composed of a plurality of component models such as a center pillar and a side sill. For example, the part model representing the center pillar is arranged on the vehicle side surface (portion surrounded by a dotted frame in FIG. 2).
Further, in the overall analysis model 41 shown in FIG. 2, a rigid wall 45 is set above the roof of the overall structure model 43 as an analysis condition corresponding to a roof crash as a collision mode.

<Collision analysis means>
The collision analysis unit 15 performs a collision analysis on the entire analysis model generated by the entire analysis model generation unit 13 and acquires analysis data for each element and / or each node.
The impact analysis can be performed using a commercially available finite element method (FEM) analysis system. The analysis data acquired by the collision analysis unit 15 for each element and / or for each node includes displacement, strain, stress, internal energy density, and the like.

As an example of the result obtained by performing the collision analysis by the collision analysis means 15, a contour diagram of the displacement is shown in FIG.
As shown in FIG. 3, the rigid wall 45 shown in FIG. 2 is deformed around the roof of the overall structure model 43 by being pushed into the roof of the overall structure model 43.

<Analysis data mapping means>
The analysis data mapping means 17 has the same shape as the overall analysis model generated by the overall analysis model generation means 13 and a structure in which element information and node information are associated with element information and / or node information of the overall analysis model. The analysis data acquired by the collision analysis means 15 is mapped (mapped) to the elements and / or nodes of the evaluation model.

FIG. 4 shows a contour diagram when mapping the displacement shown in FIG. 3 to the structure evaluation model 53 as an example of mapping of analysis data by the analysis data mapping means 17.
By mapping the displacement acquired by the collision analysis means 15 onto the structure evaluation model 53, it is possible to easily confirm a part or part having a large displacement.

  In the mapping of analysis data by the analysis data mapping means 17, when element recutting is not performed in the collision analysis by the collision analysis means 15, element information and node information of the overall analysis model 41, element information and nodes of the structure evaluation model 53 The association with the information is performed by, for example, an element number and a node number.

  The analysis data mapping unit 17 also performs the entire analysis model based on the element information and the node information before and after the element recutting even when the element such as the course cutting is performed in the collision analysis by the collision analysis unit 15. 41 element information and node information is associated with the element information and node information of the structure evaluation model 53, and the analysis data for each element and / or node acquired by the collision analysis means 15 is used as the structure evaluation model 53. Can be mapped.

The analysis data mapped by the analysis data mapping means 17 may be stress, strain, internal energy density, etc. in addition to the displacement shown in FIG.
Further, when mapping the displacement onto the structure evaluation model 53, for example, the average value, the maximum value, or the minimum value of the displacement of the nodes constituting each element is obtained, and any one of these is selected to correspond. You may map to an element, or you may map the displacement of each node to the structure evaluation model 53 as it is.

<Structure part model generation means>
The structure partial model generation means 19 extracts elements and / or nodes whose values of the analysis data mapped to the structure evaluation model 53 are equal to or greater than a predetermined threshold from the structure evaluation model (see FIG. 5). Then, a structure partial model 63 as shown in FIG. 6 is generated based on the extracted element and / or the region including the node.

  In FIG. 5, a region corresponding to the front bumper is extracted in addition to the vehicle side surface of the automobile as an element whose displacement is equal to or greater than a predetermined threshold. However, the region corresponding to the front bumper is not continuously connected to the collision part (roof) in the roof crash.

  Therefore, the structure partial model generation unit 19 first deletes the elements and / or nodes in the region where the parts are not continuously connected to the collision site.

Then, with respect to the remaining area including the element and / or node, in the entire structure evaluation model 53, (A) the boundary between the extracted element and / or area including the node is extracted. The structure part model 63 composed of the whole part having the extracted elements and / or nodes is generated (see FIGS. 6 and 7).
Alternatively, in the entire structure evaluation model 53, (B) a region composed of the extracted elements and / or nodes is set, and the boundary of the region is smoothly interpolated by, for example, a spline function or the like, and the structure shown in FIG. The partial model 73 may be generated.

  For example, the front pillar lower portion 67 shown in FIG. 7 is generated by expanding the region composed of the extracted elements and / or nodes to the end of the component by the process (A) (the part in FIG. 7). P)), the entire front pillar lower portion 67 in the structure evaluation model 53 is included in the structure portion model 63.

  On the other hand, the front pillar lower portion 77 shown in FIG. 8 is generated by interpolating the boundary of the region composed of the extracted elements and / or nodes by the processing of (B) above, so the lower portion of the front pillar shown in FIG. A difference is seen in the shape of the same part as 67 (see the part Q in FIG. 8), and a part of the front pillar lower portion 77 in the structure evaluation model 53 is included in the structure part model 73.

  Further, the structure partial model generation means 19 may generate the structure partial model by designating one of the processes (A) or (B) for each part of the structure evaluation model 53. good.

  In addition, as to which of the above processing (A) or (B) is used, for example, the area when the extracted element and / or the region including the node is expanded to the end of the part is the extracted element. And / or when it is more than twice the area of the area | region containing a node, it is good also as what performs said (B) process.

<Partial analysis model generation means>
As shown in FIG. 7, the partial analysis model generation unit 21 sets analysis conditions and boundary conditions corresponding to the collision analysis by the collision analysis unit 15 in the structure partial model 63 generated by the structure partial model generation unit 19. Thus, the partial analysis model 61 is generated.

  As analysis conditions set in the structure partial model 63, there are initial conditions, material characteristics (material types), collision modes, contact conditions, and the like, as in the overall analysis model 41. In FIG. 7, since the collision mode is a roof crash, the partial analysis model 61 is generated by setting the rigid wall 65 as the collision object model.

Regarding the boundary conditions set in the partial analysis model 61, there are a displacement constraint condition, a speed condition, and the like as in the whole analysis model 41.
The displacement constraint condition is set to an element and / or a node whose displacement is 0 in the result of the collision analysis by the overall analysis model 41.
On the other hand, the speed condition is set to the element and / or the node based on the acceleration information in the result of the collision analysis by the overall analysis model 41.

  FIG. 8 shows a partial analysis model 71 generated by setting analysis conditions and boundary conditions in the structure partial model 73.

  The partial analysis models 61 and 71 shown in FIG. 7 and FIG. 8 target roof crush, and the rigid body wall 65 and the rigid body wall 75 are provided as colliding object models above the structural body part model 63 and the structural body part model 73 to be analyzed. Is set. In addition, a rigid body element that gives a displacement constraint condition is set as the boundary condition.

  Only the displacement constraint condition may be set as the boundary condition of the partial analysis model 61 or 71 for the collision mode in a state where the structure is stationary like the roof crash shown in FIG. 7 or FIG.

  On the other hand, for a collision mode in which the structure is moving, such as a front full-wrap collision, in a moving coordinate system that moves at a constant speed, a displacement constraint condition that restrains displacement in the moving coordinate system; Both speed conditions representing the motion speed of the structure may be set as boundary conditions for the partial analysis model 61 or 71.

Next, an example of a structure partial analysis model generation method using the partial analysis model generation apparatus 1 according to the present embodiment configured as described above will be described together with the operation of the partial analysis model generation apparatus 1.
The structure partial analysis model generation method according to the present embodiment includes an overall analysis model generation step S1, a collision analysis step S3, an analysis data mapping step S5, a structure partial model generation step S7, and a partial analysis model generation. Step S9, and the computer executes each step.
Below, each said step is demonstrated in detail based on FIG.

<Whole analysis model generation step>
First, using the overall analysis model generation means 13, an analysis condition for collision analysis is added to the overall structure model composed of a plurality of parts modeled with elements (mesh) and having element information, node information, and part information. The boundary condition is set to generate the entire analysis model 41 (S1, see FIG. 2).

<Collision analysis step>
Next, collision analysis is performed on the entire analysis model 41 using the collision analysis means 15 and analysis data is obtained for each element and / or for each node (see S3, FIG. 3).

<Analysis data mapping step>
Next, using the analysis data mapping means 17, the element information and / or node information has the same shape as the entire analysis model 41 before the collision in the collision analysis step S 3, and the element information and / or node information of the entire analysis model The analysis data acquired by the collision analysis unit 15 is mapped to the associated structure evaluation model 53 (S5, see FIG. 4).

<Structural part model generation step>
Next, the structure partial model generation means 19 extracts elements and / or nodes whose analysis data mapped to the structure evaluation model 53 in the analysis data mapping step S5 is equal to or greater than a predetermined threshold (see FIG. 5). Based on the extracted element and / or the region including the node, the structure partial model 63 to be subjected to the collision analysis is generated (S7, see FIG. 6).

  Like the part corresponding to the front bumper shown in FIG. 5, the structure part model generation means 19 deletes the extracted element and / or node where the parts are not continuously connected from the collision part, and the structure part model is deleted. 63, but the operator can specify the elements and / or nodes to be deleted.

  When the structure partial model is generated by the structure partial model generation means 19, as described above, the extracted elements and / or nodes are included for each part constituting the structure evaluation model 53 (A). The boundary of the region is expanded to the end of the part having the extracted element and / or node, or (B) in the structure evaluation model 53, the boundary of the extracted element and / or node is smoothed by a spline function or the like. However, in the structure partial model generation step S7, the operator may correct the structure partial model generated by the structure partial model generation means 19.

  Further, in the structure partial model generation step S7, the operator expands the region including the extracted element and / or node to the end of the part for the whole structure evaluation model 53 or for each part constituting the structure evaluation model 53, or A position for smoothly interpolating the boundary of the area including the extracted element and / or node may be designated.

<Partial analysis model generation step>
Next, the partial analysis model generation means 21 sets analysis conditions and boundary conditions corresponding to the collision analysis in the collision analysis step S3 in the structure partial model 63 or 73 generated in the structure partial model generation step S7. A partial analysis model 61 or 71 is generated (see S9, FIG. 7 and FIG. 8).

  As described above, the structure partial analysis model generation device 1 or method according to the first embodiment has the same analysis accuracy as the collision analysis for the entire structure, and the calculation time required for the collision analysis. It is possible to create a partial analysis model in which Furthermore, since the partial analysis model generation apparatus 1 or method for a structure according to the first embodiment creates a partial analysis model according to a unique standard even when the target structure is different, the structure partial analysis model generation apparatus 1 or the method However, it is possible to create a partial analysis model having a certain analysis accuracy without lowering the analysis accuracy.

When the vehicle collides with a linear motion at a constant speed, such as a front full-wrap collision, the entire structure model is placed on a moving coordinate system that moves at a constant speed. An entire analysis model can be generated by appropriately setting analysis conditions and boundary conditions on the coordinate system.
In this case, when the collision analysis is performed on the entire analysis model generated on the moving coordinate system and the displacement is acquired as analysis data, the relative displacement on the moving coordinate system may be acquired.

[Embodiment 2]
The structure collision analysis method according to the second embodiment of the present invention is a structure using a partial analysis model generated by the method for generating a partial analysis model of a structure according to the first embodiment of the present invention by a computer. The collision analysis is performed by changing the analysis conditions set in the partial analysis model.

  Examples of the analysis condition to be changed in the second embodiment include a material type and / or a material combination of each component.

  By performing the collision analysis by changing the analysis conditions set in the partial analysis model, the collision analysis is performed for a large number of conditions in a shorter calculation time than in the case of performing the collision analysis for the entire structure. Therefore, it is possible to efficiently carry out FS examination in the development and design of the structure.

  In order to confirm the effect of the present invention, the structure collision analysis was performed using the partial analysis model generated in accordance with the procedure shown in the first embodiment, which will be described below.

In this example, the roof crash shown in FIG. 2 was targeted.
First, a rigid wall 45 that pushes the roof portion of the overall structure model 43 as an analysis condition is arranged for the overall structure model 43 of the automobile vehicle, and the boundary condition is set to generate the overall analysis model 41.

Next, the entire analysis model 41 was subjected to a collision analysis, and the displacement shown in FIG. 3 was acquired as analysis data.
The displacement acquired as the analysis data was mapped on the structure evaluation model 53 (FIG. 4), and the element whose displacement is greater than or equal to the threshold was extracted (FIG. 5).
And based on the extracted element, the structure part model 63 shown in FIG. 6 was produced | generated.
With respect to the generated structure part model 63, a rigid body wall 65 that pushes the roof of the structure part model 63 as an analysis condition is arranged, and a rigid element that restrains displacement as a boundary condition is set as shown in FIG. A partial analysis model 61 was generated.

  As an example of the present invention, a collision analysis was performed on the partial analysis model 61 generated according to the above procedure, and a rigid wall reaction force acting on the rigid wall 65 in the collision process was obtained in order to evaluate the roof strength.

  As a comparative example, as an analysis example for the whole structure, the result of the collision analysis using the overall analysis model 41 (Comparative Example 1) and the result of the collision analysis using the analysis model 91 shown in FIG. (Comparative example 2) was examined.

  The analysis model 91 used in the comparative example 2 is an example of the prior art, and a rigid body wall 95 is set as an analysis condition in the structure partial model 93 generated by extracting the center pillar and the side sill from the overall structure model 43. , Boundary conditions are set in consideration of deformation at the time of collision in the collision analysis using the overall analysis model 41.

  In any of the present invention example, comparative example 1 and comparative example 2, the intrusion speed (vertical speed of the rigid wall) is 5 km / h, the roll angle (the angle between the horizontal plane and the rigid wall of the entire analysis model) is 25 ° as the collision condition. It was.

FIG. 11 shows the analysis result of the relationship between the rigid wall stroke in the vertical direction of the rigid wall and the rigid wall reaction force.
The result of the present invention was almost the same as that of Comparative Example 1 for the entire structure, and the analysis accuracy was better than that of Comparative Example 2 as the prior art. Further, in the example of the present invention, the calculation time required for the collision analysis could be shortened to about 1/10 compared with the comparative example 1.

  As described above, by performing the collision analysis using the partial analysis model of the structure generated using the partial analysis model generation apparatus and method of the structure according to the present invention, the same degree as the collision analysis for the entire structure The analysis time can be greatly reduced and the calculation time can be greatly shortened.

DESCRIPTION OF SYMBOLS 1 Partial analysis model production | generation apparatus 3 Display apparatus 5 Input device 7 Main storage device 9 Auxiliary storage device 11 Operation processing part 13 Whole analysis model production | generation means 15 Collision analysis means 17 Analysis data mapping means 19 Structure partial model production | generation means 21 Partial analysis model Generation means 41 Overall analysis model 43 Overall structure model 45 Rigid wall 53 Structure evaluation model 61 Partial analysis model 63 Structure partial model 65 Rigid wall 67 Lower front pillar 71 Partial analysis model 73 Structure partial model 75 Rigid wall 77 Front pillar Lower part 91 Analysis model (Comparative example 2)
93 Structure partial model (Comparative Example 2)
95 Rigid wall (Comparative Example 2)

Claims (7)

Generate an overall analysis model that consists of multiple parts modeled with elements (mesh) and nodes, and generates an overall analysis model by setting analysis conditions and boundary conditions for the entire structure model with element information and node information Means,
A collision analysis means for performing a collision analysis on the whole analysis model generated by the whole analysis model generation means, and obtaining analysis data for each element and / or for each node;
Elements of the structure evaluation model having the same shape as the global analysis model in the global analysis model generation means and element information and node information associated with element information and / or node information of the global analysis model and / or An analysis data mapping means for mapping (mapping) the analysis data obtained by the collision analysis means to a node;
An element and / or node whose value of the analysis data mapped to the structure evaluation model is greater than or equal to a predetermined threshold is extracted from the structure evaluation model, and is based on a region including the extracted element and / or node. A structure partial model generating means for generating a structure partial model,
A partial analysis model generating means for generating a partial analysis model by setting analysis conditions and boundary conditions corresponding to collision analysis by the collision analysis means to the structure partial model generated by the structure partial model generation means; A partial analysis model generation device for a structure characterized by comprising the structure.   2. The partial analysis model generation apparatus for a structure according to claim 1, wherein the structure partial model generation unit generates a structure partial model composed of an entire part having the extracted elements and / or nodes. . The structure partial model generation means sets a region composed of the extracted elements and / or nodes, generates a structure partial model by interpolating the boundary of the region,
The partial analysis model generation means sets an analysis condition corresponding to a collision analysis by the collision analysis means in the structure partial model generated by the structure partial model generation means, and sets a boundary at the interpolated boundary. 2. The partial analysis model generation apparatus for a structure according to claim 1, wherein the partial analysis model is generated by setting conditions. The computer performs the following steps:
An overall analysis model generation step for generating an overall analysis model by setting analysis conditions and boundary conditions for an overall structure model composed of a plurality of parts modeled by elements (mesh) and having element information and node information;
A collision analysis step of performing a collision analysis on the overall analysis model generated in the overall analysis model generation step and acquiring analysis data for each element and / or for each node;
The collision is applied to the structure evaluation model having the same shape as the whole structure model in the whole analysis model generation step, and element information and node information associated with element information and / or node information of the whole structure model. An analysis data mapping step for mapping (mapping) the analysis data acquired in the analysis step;
In the analysis data mapping step, elements and / or nodes whose analysis data mapped to the structure evaluation model are equal to or greater than a predetermined threshold are extracted, and a collision analysis is performed based on the extracted elements and / or nodes. A structure partial model generation step for generating a structure partial model as a target of
A partial analysis model generation step for generating a partial analysis model by setting analysis conditions and boundary conditions corresponding to the collision analysis in the collision analysis step to the structure partial model generated in the structure partial model generation step; A method for generating a partial analysis model of a structure characterized by comprising.   5. The partial analysis model generation method for a structure according to claim 4, wherein the structure partial model generation step generates a structure partial model composed of the whole part having the extracted elements and / or nodes. . The structure partial model generation step sets a region composed of the extracted elements and / or nodes, generates a structure partial model by interpolating the boundary of the region,
In the partial analysis model generation step, an analysis condition corresponding to a collision analysis by the collision analysis unit is set in the structure partial model generated by the structure partial model generation unit, and a boundary is set on the interpolated boundary. 5. The partial analysis model generation method for a structure according to claim 4, wherein the partial analysis model is generated by setting conditions. A structure collision analysis is performed by a computer using the partial analysis model generated by the structure partial analysis model generation method according to any one of claims 4 to 6,
A collision analysis method for a structure, wherein a collision analysis is performed by changing an analysis condition set in the partial analysis model.