JPH063241B2 - Dynamic vibration absorber with shock response suppression function - Google Patents
Dynamic vibration absorber with shock response suppression functionInfo
- Publication number
- JPH063241B2 JPH063241B2 JP61195819A JP19581986A JPH063241B2 JP H063241 B2 JPH063241 B2 JP H063241B2 JP 61195819 A JP61195819 A JP 61195819A JP 19581986 A JP19581986 A JP 19581986A JP H063241 B2 JPH063241 B2 JP H063241B2
- Authority
- JP
- Japan
- Prior art keywords
- dynamic vibration
- vibration absorber
- wave
- mass
- shock response
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000006096 absorbing agent Substances 0.000 title claims description 36
- 230000004044 response Effects 0.000 title claims description 20
- 230000035939 shock Effects 0.000 title claims description 20
- 230000001629 suppression Effects 0.000 title 1
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 description 12
- 238000013016 damping Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、衝撃応答抑制機能を有する動吸振器に関する
ものである。Description: [Industrial application] The present invention relates to a dynamic vibration reducer having a shock response suppressing function.
［従来の技術］ 動吸振器は、繰り返し外力が作用する振動系の減衰能改
善に用いられ、最適調整条件が実現できれば、かなりの
制振効果を期待できる。しかしながら、振動系に衝撃力
などの外力が加わり、過渡現象が問題となる場合、動吸
振器をそのまま適用しようとしても、十分な制振効果を
期待することはできない。とりわけ、衝撃応答の第１波
が最大値を呈するような場合には、動吸振器による最大
衝撃応答の低減化は功を奏さない。[Prior Art] A dynamic vibration absorber is used to improve the damping capacity of a vibration system in which an external force is repeatedly applied, and if an optimum adjustment condition can be realized, a considerable damping effect can be expected. However, when an external force such as an impact force is applied to the vibration system and a transient phenomenon becomes a problem, a sufficient vibration damping effect cannot be expected even if the dynamic vibration reducer is applied as it is. Especially, when the first wave of the shock response exhibits the maximum value, the reduction of the maximum shock response by the dynamic vibration absorber is not effective.
また、動吸振器を定常振動の減衰に用いる場合でも、励
振開始時点では、外力が系に衝撃的に作用する場合があ
り、その際には必ず過渡振動を伴う。したがって、たと
え動吸振器を適用した系であっても、衝撃応答の第１波
は殆ど抑制されることがないため、場合によっては制振
対象の衝突や破損など、様々な障害を惹き起こすおそれ
がある。Even when the dynamic vibration reducer is used to damp steady vibration, external force may act on the system shocking at the start of excitation, and in that case, transient vibration is always involved. Therefore, even in a system to which a dynamic vibration reducer is applied, the first wave of the shock response is hardly suppressed, which may cause various obstacles such as collision or breakage of the vibration damping object. There is.
［発明が解決しようとする問題点］ 本発明の目的は、動吸振器に予見動作機構を付設するこ
とにより、動吸振器における衝撃応答抑制機能の実現化
を可能にすることにあり、特に、動吸振器による制振力
の第１波または第２波が衝撃応答の抑制に有効に利用で
きることを確かめ、それを利用した衝撃応答抑制機能を
有する動吸振器を提供することを目的とするものであ
る。[Problems to be Solved by the Invention] An object of the present invention is to make it possible to realize a shock response suppressing function in a dynamic vibration reducer by attaching a preview motion mechanism to the dynamic vibration reducer. An object of the present invention is to confirm that the first wave or the second wave of the vibration damping force by the dynamic vibration absorber can be effectively used for suppressing the shock response, and to provide a dynamic vibration damper having the shock response suppressing function using the vibration damping force. Is.
［問題点を解決するための手段］ 上記目的を達成するため、本発明の動吸振器において
は、質量及びばねにより構成される主振動系の上記質量
に、動吸振器ばねを介して動吸振器質量を取付けると共
に、その動吸振器質量に予め初期変位を与えた状態でそ
れを保持する保持手段を付設し、上記主振動系に衝撃力
の作用を予め検出する検出器を設けて、この検出器出力
に基づき、衝撃力の第１波に対して動吸振器による制振
力の第１波または第２波が時間的に一致するように上記
保持手段による保持を解除するための信号を出力する制
御装置を設けている。[Means for Solving the Problems] In order to achieve the above object, in the dynamic vibration absorber of the present invention, the dynamic vibration absorber is added to the mass of the main vibration system constituted by the mass and the spring via the dynamic vibration absorber spring. In addition to mounting the device mass, the dynamic vibration absorber mass is provided with a holding means for holding it in a state in which an initial displacement is given in advance, and the main vibration system is provided with a detector for detecting the action of the impact force in advance. Based on the output of the detector, a signal for releasing the holding by the holding means is set so that the first wave or the second wave of the vibration damping force by the dynamic vibration absorber coincides with the first wave of the impact force in time. A control device for outputting is provided.
［作用］ 主振動系に衝撃力が作用する以前に、検出器によってそ
の衝撃力の作用を予め検出し、保持手段により動吸振器
質量に対して予め与えていた初期変位を適切なタイミン
グで解除して、衝撃力の第１波に対して動吸振器による
制振力の第１波または第２波を時間的に一致させる。そ
れにより、衝撃応答が効果的に抑制される。[Action] Before the impact force acts on the main vibration system, the action of the impact force is detected by the detector in advance, and the initial displacement given to the mass of the dynamic vibration absorber by the holding means is released at an appropriate timing. Then, the first wave or the second wave of the damping force by the dynamic vibration absorber is temporally matched with the first wave of the impact force. Thereby, the shock response is effectively suppressed.
［実施例］ 以下に本発明の実施例を図面を参照しながら詳述する。Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明に係る動吸振器に実施例を示し、同図に
おいては、主振動系が質量Ｍを有するアンビル１とを定
数Ｋのばね２，２によって構成され、上記アンビル１に
対してハンマーヘッド３により衝撃力fimを作用させる
場合を例示している。FIG. 1 shows an embodiment of a dynamic vibration reducer according to the present invention. In FIG. 1, the main vibration system is composed of an anvil 1 having a mass M and springs 2 having a constant K. The case where the impact force f im is applied by the hammer head 3 is illustrated.
上記アンビル１に取付ける動吸振器４としては、上記ア
ンビル１に定数Kdの動吸振器ばね５を介して質量Mdの動
吸振器質量６を取付け、さらに衝撃応答抑制機能を持た
せるため、動吸振器質量６のガイドロッド７に対して、
それを挟着保持することにより動吸振器質量６に予め初
期変位を与える保持手段としてのクランプシリンダ８，
８を設けると共に、動吸振器粘性係数Bdを与える粘性付
加手段機構９，９を設けている。As the dynamic vibration absorber 4 to be attached to the anvil 1, a dynamic vibration absorber mass 6 having a mass M d is attached to the anvil 1 via a dynamic vibration absorber spring 5 having a constant K d in order to further have a shock response suppressing function. For the guide rod 7 of the dynamic vibration absorber mass 6,
A clamp cylinder 8 as a holding means for preliminarily providing an initial displacement to the dynamic vibration absorber mass 6 by sandwiching and holding it,
8 is provided, and also viscous addition means mechanisms 9 and 9 that give the dynamic vibration absorber viscosity coefficient B d are provided.
また、上記主振動系には、予見動作機構として、ハンマ
ーヘッド３による衝撃力の作用を予め検出する光学セン
サ等の検出器10を設け、この検出器10に制御装置11を接
続している。上記制御装置11は、検出器10の出力に必要
な遅延等を与え、上記クランプシリンダ8,8によるガイ
ドロッド７の保持を解除するための信号、即ち圧力源13
からの流体圧でクランプシリンダ8,8を動作させるため
のソレノイド12等を駆動する信号を出力するものである
が、その制御は、以下に詳述するように、衝撃力の第１
波に対して動吸振器４による制振力の第１波または第２
波が時間的に一致するように、上記クランプシリンダ8,
8によるガイドロッド７の保持を解除するものである。Further, the main vibration system is provided with a detector 10 such as an optical sensor for detecting the action of the impact force of the hammer head 3 in advance as a preview motion mechanism, and the controller 10 is connected to the detector 10. The control device 11 gives a necessary delay or the like to the output of the detector 10 to release the holding of the guide rod 7 by the clamp cylinders 8, 8, that is, the pressure source 13
A signal for driving the solenoid 12 or the like for operating the clamp cylinders 8, 8 by the fluid pressure from is output. The control is performed by the first impact force as described below.
The first or second wave of the damping force by the dynamic vibration absorber 4 against the wave
Clamp cylinder 8 above so that the waves match in time,
The holding of the guide rod 7 by 8 is released.
上記構成を有する動吸振器４は、最大衝撃応答の低減化
を図るための解決策として、予め、動吸振器４における
動吸振器質量６に適宜手段で初期変位Xaを与え、その状
態で動吸振器質量６のガイドロッド７をクランプシリン
ダ8,8で挟着保持することにより、動吸振器質量６自体
を予め初期変位Xaを与えた状態に保持しておき、ハンマ
ーヘッド３による衝撃力fimが主振動系に入力される以
前にその初期変位を開放し、衝撃力fimが衝撃伝達力ft
の第１波を生成する時点で十分な制振力fdを作用させる
ことにより、衝撃応答を抑制するものである。The dynamic vibration reducer 4 having the above-described configuration is, as a solution for reducing the maximum shock response, previously gives an initial displacement X a to the dynamic vibration absorber mass 6 in the dynamic vibration reducer 4 by an appropriate means, and in that state. The guide rod 7 of the dynamic vibration absorber mass 6 is clamped and held by the clamp cylinders 8 and 8 so that the dynamic vibration absorber mass 6 itself is held in a state where the initial displacement Xa is given in advance, and the impact by the hammer head 3 is generated. Before the force f im is input to the main vibration system, its initial displacement is released, and the impact force f im becomes the impact transmission force f t.
The impact response is suppressed by applying a sufficient damping force f d at the time of generating the first wave of
さらに具体的に説明すると、本発明者の解析により導出
した衝撃力及び初期変位に対する無次元伝達力im，
dは、第２図にようになる。これは、質量比μが０．１
の場合を示しており、破線で描かれたimは、第１波で
最大値を持ち、その後は単調減少している。しかしなが
ら、dは第１波の山の値d1よりも谷の値｜d2｜の
方が1.87倍大きく現われている。ここで、di（ｉ＝
１，２，３，…）の記号の意味は、図に示すように、応
答波の山ないし谷に付けられた番号の位置における極値
を示している。More specifically, the dimensionless transmission force im with respect to the impact force and the initial displacement derived from the analysis of the present inventor,
d becomes as shown in FIG. This is because the mass ratio μ is 0.1.
, The im drawn by the broken line has the maximum value in the first wave, and then decreases monotonically. However, d is 1.87 times larger in the valley value | d2 | than in the first wave crest value d1 . Where di (i =
The meaning of the symbols (1, 2, 3, ...) Shows the extreme values at the positions of the numbers attached to the peaks or valleys of the response wave, as shown in the figure.
｜d2/d1｜及び｜im2/im1｜を質量比μに対して
描くと、第３図にようになる。同図において、まず、
dに関しては、第２波の絶対値の方が第１波の値よりも
大きく、質量比μが小さくなるに従いこの傾向は顕著と
なり、μ＝0.05で２倍に達している。これに対して、
imの第２波の絶対値は第１波よりも小さく、質量比μの
増大と共にその比も高まる。FIG. 3 shows | d2 / d1 | and | im2 / im1 | plotted against the mass ratio μ. In the figure, first,
Regarding d , this tendency becomes remarkable as the absolute value of the second wave is larger than that of the first wave and the mass ratio μ becomes smaller, and doubles at μ = 0.05. On the contrary,
The absolute value of the second wave of im is smaller than that of the first wave, and the ratio increases as the mass ratio μ increases.
そこで、この性質を利用し、上記動吸振器においては、
初期変位Xdに対して最も効率よく制振力の得られるd2
をim1の抑制に用いるようにしている。最適予見時間
は、im1とd2を与える時刻が一致するように、dの
時間軸を移動させればよい。Therefore, utilizing this property, in the above-mentioned dynamic vibration absorber,
Initial displacement X d is obtained most efficiently damping force with respect to d2
Is used to suppress im1 . The optimum foreseeing time can be moved on the time axis of d so that the times at which im1 and d2 are given match.
なお、質量比μが小さい場合にはd2を使用するのが有
効であるが、μが0.26以上に大きくなると、d1を使用
する方がよい。It should be noted that it is effective to use d2 when the mass ratio μ is small, but it is better to use d1 when μ becomes larger than 0.26.
第４図は、本発明に基づく衝撃応答抑制機能を付加して
いない動吸振器による衝撃吸収の態様を、第５図は本発
明の動吸振器による衝撃吸収の態様を示している。両図
の比較により、本発明の動吸振器による衝撃応答の抑制
効果が顕著であることがわかる。FIG. 4 shows a mode of shock absorption by the dynamic vibration absorber without adding the shock response suppressing function according to the present invention, and FIG. 5 shows a mode of shock absorption by the dynamic vibration absorber of the present invention. By comparing the two figures, it can be seen that the effect of suppressing the impact response by the dynamic vibration absorber of the present invention is remarkable.
［発明の効果］ 以上に詳述したように、本発明の動吸振器によれば、そ
の衝撃応答抑制機能により、動吸振器による衝撃応答を
有効に抑制することができる。[Advantages of the Invention] As described in detail above, according to the dynamic vibration reducer of the present invention, the shock response suppressing function of the dynamic vibration reducer can effectively suppress the shock response.
第１図は本発明に係る衝撃応答抑制機能を有する動吸振
器の実施例を示す構成図、第２図及び第３図は衝撃力及
び初期変位に対する無次元伝達力im，dについての
説明図、第４図及び第５図は本発明に基づく衝撃応答抑
制機能を付加していない動吸振器、及びそれを付加した
動吸振器による衝撃吸収の態様を示す線図である。 ４‥動吸振器、５‥動吸振器ばね、 ６‥動吸振器質量、10‥検出器、 11‥制御装置。FIG. 1 is a configuration diagram showing an embodiment of a dynamic vibration reducer having an impact response suppressing function according to the present invention, and FIGS. 2 and 3 are explanatory diagrams of a dimensionless transmission force im , d with respect to an impact force and an initial displacement. FIGS. 4 and 5 are diagrams showing a dynamic vibration absorber to which the shock response suppressing function according to the present invention is not added and a mode of shock absorption by the dynamic vibration absorber to which the shock absorber is added. 4 ... Dynamic vibration absorber, 5 ... Dynamic vibration absorber spring, 6 ... Dynamic vibration absorber mass, 10 ... Detector, 11 ... Control device.
Claims (1)
上記質量に、動吸振器ばねを介して動吸振器質量を取付
けると共に、その動吸振器質量に予め初期変位を与えた
状態でそれを保持する保持手段を付設し、上記主振動系
に衝撃力の作用を予め検出する検出器を設けて、この検
出器出力に基づき、衝撃力の第１波に対して動吸振器に
よる制振力の第１波または第２波が時間的に一致するよ
うに上記保持手段による保持を解除するための信号を出
力する制御装置を設けたことを特徴とする衝撃応答抑制
機能を有する動吸振器。1. A dynamic vibration absorber mass is attached to the above mass of a main vibration system composed of a mass and a spring via a dynamic vibration absorber spring, and the dynamic vibration absorber mass is subjected to an initial displacement in advance. The main vibration system is provided with a detector for detecting the action of the impact force in advance, and based on the output of this detector, the first vibration of the impact force is damped by the dynamic vibration absorber. A dynamic vibration absorber having a shock response suppressing function, characterized in that a control device for outputting a signal for releasing the holding by the holding means is provided so that the first wave or the second wave of force coincides in time. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61195819A JPH063241B2 (en) | 1986-08-21 | 1986-08-21 | Dynamic vibration absorber with shock response suppression function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61195819A JPH063241B2 (en) | 1986-08-21 | 1986-08-21 | Dynamic vibration absorber with shock response suppression function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6353332A JPS6353332A (en) | 1988-03-07 |
| JPH063241B2 true JPH063241B2 (en) | 1994-01-12 |
Family
ID=16347521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61195819A Expired - Lifetime JPH063241B2 (en) | 1986-08-21 | 1986-08-21 | Dynamic vibration absorber with shock response suppression function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063241B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2555204B2 (en) * | 1989-10-04 | 1996-11-20 | 鹿島建設株式会社 | Vibration suppression method for structures |
| US20080295545A1 (en) * | 2007-05-29 | 2008-12-04 | Lg Electronics Inc. | Dynamic Vibration Absorber |
| CN101492876B (en) * | 2009-03-06 | 2011-09-28 | 南京乐金熊猫电器有限公司 | Dynamic shock-absorbing device for drum washing machine |
| CN101798742A (en) * | 2010-03-02 | 2010-08-11 | 南京乐金熊猫电器有限公司 | Power shock-absorbing device and washing machine provided with same |
| CN105757155B (en) * | 2016-05-06 | 2018-04-24 | 哈尔滨工程大学 | A kind of adjustable half active shock-absorbing means of quality |
| CN107394742B (en) * | 2017-07-01 | 2019-04-30 | 合肥东玖电气有限公司 | A kind of power equipment lightning arrester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5646137A (en) * | 1979-09-18 | 1981-04-27 | Agency Of Ind Science & Technol | Dynamic absorbing method for impact vibration |
-
1986
- 1986-08-21 JP JP61195819A patent/JPH063241B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6353332A (en) | 1988-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |