JPS6362958B2 - - Google Patents
Info
- Publication number
- JPS6362958B2 JPS6362958B2 JP15408683A JP15408683A JPS6362958B2 JP S6362958 B2 JPS6362958 B2 JP S6362958B2 JP 15408683 A JP15408683 A JP 15408683A JP 15408683 A JP15408683 A JP 15408683A JP S6362958 B2 JPS6362958 B2 JP S6362958B2
- Authority
- JP
- Japan
- Prior art keywords
- mass damper
- receiver
- mass
- noise
- present
- 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
Links
- 239000000725 suspension Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000002955 isolation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
- G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明はマスダンパーを用いた吊下型低雑音受
波器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hanging low-noise receiver using a mass damper.
船舶や海面に浮べたフロート等から水中に吊下
して水中音を計測する吊下型受波器においては、
波浪等によるフロート等の動揺が受波器に伝達さ
れて、いわゆる自己雑音が発生する。 For suspended receivers that measure underwater sound by suspending them underwater from ships or floats on the sea surface,
The agitation of the float due to waves or the like is transmitted to the receiver, generating so-called self-noise.
そこで、このような自己雑音を防止するため、
従来は第１図に示すようにフレームと該フレーム
の外周を覆う布とで構成される軟性のマスダンパ
ー１をゴム材等により形成された吊下紐２で吊下
支持すると共に、マスダンパー１内に受波器３を
配設した低周波防振型受波器が使用されている。 Therefore, in order to prevent such self-noise,
Conventionally, as shown in FIG. 1, a soft mass damper 1 composed of a frame and a cloth covering the outer periphery of the frame is suspended and supported by a suspension string 2 made of rubber material or the like. A low frequency anti-vibration type wave receiver with a wave receiver 3 disposed inside is used.
この低周波防振型受波器は、前記軟性のマスダ
ンパー１をMassとし、ゴム材による吊下紐２を
コンプライアンスとして低周波防振を行つたもの
であるが、これによると、前記の如くマスダンパ
ー１がフレームと布とで構成される軟性のもので
あるため、揚収時や船上に置いた時等にぶつけて
破損し易いという欠点があり、取扱いが非常に困
難であつた。 This low frequency vibration isolation type receiver performs low frequency vibration isolation by using the soft mass damper 1 as mass and the suspension string 2 made of rubber material as compliance. According to this, as described above, Since the mass damper 1 is made of a soft material made of a frame and cloth, it has the disadvantage that it is easily damaged by being hit when it is lifted up or placed on a ship, making it extremely difficult to handle.
また、取扱い性をよくするため、剛性のマスダ
ンパーを使用することが考えられるが、従来の剛
性のマスダンパーでは、内部に水を出入させるた
めの通水孔とマスダンパー内の容積によりヘルム
ホルツ共鳴器が構成されて、動揺による自己発生
雑音がかえつて高くなるという欠点があつた。 In addition, in order to improve handling, it is possible to use a rigid mass damper, but conventional rigid mass dampers have Helmholtz resonance due to the water holes for letting water in and out and the volume inside the mass damper. However, due to the structure of the device, the self-generated noise due to vibrations was rather high.
本発明はこれらの欠点を解決することのできる
吊下型低雑音受波器を得ることを目的とし、その
ため一端を開放した剛性のマスダンパー内に受波
器を配設することにより、取扱い性を向上させる
と共に、自己発生雑音を低下させるようにしたこ
とを特徴とする。 The purpose of the present invention is to obtain a hanging type low-noise receiver that can solve these drawbacks, and for this purpose, the receiver is placed inside a rigid mass damper with one end open, thereby improving the ease of handling. It is characterized in that it improves the noise level and reduces self-generated noise.
以下図面により説明すると、第２図は本発明の
一実施例を示す斜視図で、図において４は水中で
良好な音響透過性が得られる剛性のマスダンパー
で、プラスチツク等によつて形成してあり、その
構造は中空円柱体の底板を取除いて一端開放とし
た構造となつている。 To explain the following with reference to the drawings, Fig. 2 is a perspective view showing an embodiment of the present invention, and in the figure, numeral 4 indicates a rigid mass damper that can obtain good acoustic transparency underwater, and is made of plastic or the like. The structure is that of a hollow cylindrical body with the bottom plate removed and one end left open.
本実施例は、このマスダンパー４をゴム材によ
る吊下紐２で吊下支持すると共に、その内部に受
波器３を配置し、さらにマスダンパー４の下部に
重り５を取付けて構成したもので、マスダンパー
４内の水の質量及びマスダンパー４と一緒に動く
水の質量（付加Mass）及び重り５をMassとし、
ゴム紐２をコンプライアンスとして低周波防振を
行つたものである。 In this embodiment, the mass damper 4 is suspended and supported by a suspension string 2 made of a rubber material, a wave receiver 3 is arranged inside the suspension string 2, and a weight 5 is further attached to the lower part of the mass damper 4. Let the mass of water in the mass damper 4, the mass of the water moving together with the mass damper 4 (additional Mass), and the weight 5 be Mass,
Low frequency vibration isolation is achieved using the rubber string 2 as compliance.
吊下型受波器において、軟性のマスダンパーを
使用した場合、防振系の共振周波数f0は、
m1…マスダンパー部（重りを含む）の質量
m2…含水質量（マスダンパー内の水の質量）
m3…形状による付加Mass
の式において、m2は
m2＝８／３R3 Ｒ…マスダンパーの半径
の実験式が導びかれているが、剛性のマスダンパ
ーを用いて実験した結果、
m2≒14.5R3
程度となり、軟性のマスダンパーよりも小形な構
造で低周波防振を実現できる。そして第２図に示
す本発明のように低板を取除いた構造の剛性のマ
スダンパー４の場合でも、共振周波数に全く変わ
りはなかつた。 When using a soft mass damper in a suspended receiver, the resonance frequency f 0 of the vibration isolation system is m 1 ...Mass of the mass damper part (including weight) m 2 ...Water-containing mass (mass of water in the mass damper) m 3 ...In the formula for addition Mass due to shape, m 2 is m 2 = 8/3R 3 R... An empirical formula for the radius of a mass damper has been derived, but as a result of experiments using a rigid mass damper, it is approximately m 2 ≒ 14.5R 3 , which suggests that low frequency vibration isolation can be achieved with a smaller structure than a flexible mass damper. realizable. Even in the case of the rigid mass damper 4 of the present invention shown in FIG. 2, which has a structure in which the lower plate is removed, there was no change in the resonance frequency at all.
第３図は本発明と従来例とを比較した特性図
で、波高2.4ｍ、0.15Hzで受波器を上下動させた
対波浪モデル実験の自己発生雑音分析例を示して
いる。この図から明らかなようにマスダンパーが
底板付の場合は自己雑音に雑音ピークが生じて、
雑音レベルが高いが、本発明のように底板を取除
いて一端開放にした場合はほぼ全周波数に対して
自己雑音が約20dB程度低い、また、底板付の場
合は揚収時にマスダンパー内部の水を抜くために
長時間必要となるが、一端開放の場合はマスダン
パー内部に水が残ることはない。即ち小形で低周
波振防が可能であると共に、揚収作業時等の取扱
いが容易で低雑音の吊下型受波器を実現できる。 FIG. 3 is a characteristic diagram comparing the present invention and a conventional example, and shows an example of self-generated noise analysis in a wave model experiment in which the receiver was moved up and down at a wave height of 2.4 m and a frequency of 0.15 Hz. As is clear from this figure, when the mass damper has a bottom plate, a noise peak occurs in the self-noise.
Although the noise level is high, when the bottom plate is removed and one end is left open as in the present invention, the self-noise is about 20 dB lower for almost all frequencies. It takes a long time to drain the water, but if one end is open, no water will remain inside the mass damper. In other words, it is possible to realize a hanging type receiver which is small in size and capable of suppressing low frequency vibrations, is easy to handle during lifting and retrieval work, and has low noise.
尚、上述した実施例は1CHの受波器について
説明をしたが、第４図に示すように吊下紐２、受
波器３、剛性のマスダンパー４及び重り５から成
る構成物を複数連結して多CHの受波器アレイと
しても同様の効果を得ることができる。 In the above embodiment, a 1CH receiver was explained, but as shown in FIG. Similar effects can be obtained by using a multi-CH receiver array.
以上説明したように本発明は、一端開放とした
剛性のマスダンパー内に受波器を配設した構造と
しているため、取扱い性がよく、かつ自己雑音の
発生が低い受波器を実現することができる。 As explained above, since the present invention has a structure in which the receiver is disposed within a rigid mass damper with one end open, it is possible to realize a receiver that is easy to handle and generates low self-noise. I can do it.
第１図は従来の吊下型受波器を示す斜視図、第
２図は本発明の一実施例を示す斜視図、第３図は
本発明と従来例とを比較した特性図、第４図は本
発明の他の実施例を示す斜視図である。
２……吊下紐、３……受波器、４……剛性のマ
スダンパー、５……重り。
Fig. 1 is a perspective view showing a conventional hanging type receiver, Fig. 2 is a perspective view showing an embodiment of the present invention, Fig. 3 is a characteristic diagram comparing the present invention and a conventional example, and Fig. 4 is a perspective view showing a conventional hanging type receiver. The figure is a perspective view showing another embodiment of the present invention. 2... Hanging string, 3... Wave receiver, 4... Rigid mass damper, 5... Weight.
Claims (1)
吊下紐で吊下げられた吊下型低雑音受波器におい
て、 該剛性のマスダンパーの底部を取除いて一端開
放としたことを特徴とする吊下型低雑音受波器。[Scope of Claims] 1. A hanging low-noise receiver in which a receiver is provided in a rigid mass damper and is suspended from a flexible suspension string above the rigid mass damper, comprising: A hanging low-noise receiver characterized by having one end open by removing the bottom of a rigid mass damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15408683A JPS6046700A (en) | 1983-08-25 | 1983-08-25 | Suspended type low noise receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15408683A JPS6046700A (en) | 1983-08-25 | 1983-08-25 | Suspended type low noise receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6046700A JPS6046700A (en) | 1985-03-13 |
| JPS6362958B2 true JPS6362958B2 (en) | 1988-12-05 |
Family
ID=15576583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15408683A Granted JPS6046700A (en) | 1983-08-25 | 1983-08-25 | Suspended type low noise receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046700A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387924B (en) * | 2015-12-31 | 2018-06-26 | 中国人民解放军国防科学技术大学 | A kind of optical fiber vector hydrophone with posture self-rectification function |
| CN115789442A (en) * | 2022-11-16 | 2023-03-14 | 上海船舶电子设备研究所(中国船舶集团有限公司第七二六研究所) | Self-recovery vibration damping system for attitude of vector hydrophone |
-
1983
- 1983-08-25 JP JP15408683A patent/JPS6046700A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6046700A (en) | 1985-03-13 |
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