JPH0373742U - - Google Patents
Info
- Publication number
- JPH0373742U JPH0373742U JP13483889U JP13483889U JPH0373742U JP H0373742 U JPH0373742 U JP H0373742U JP 13483889 U JP13483889 U JP 13483889U JP 13483889 U JP13483889 U JP 13483889U JP H0373742 U JPH0373742 U JP H0373742U
- Authority
- JP
- Japan
- Prior art keywords
- vibration absorber
- dynamic vibration
- air spring
- pendulum
- pressure adjustment
- 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.)
- Pending
Links
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Landscapes
- Vibration Prevention Devices (AREA)
- Bridges Or Land Bridges (AREA)
Description
第１図は本考案の実施例に係る全体構成を示す
ブロツク図、第２図は制振対象構造物の代表例と
しての斜張橋の概略図、第３図は架設状況の代表
例としての斜張橋架設状況の一例を示す斜視図、
第４図は従来の動吸振器の一例を示す側面図であ
る。
１……横梁、３……振子棹、４……重錘、５…
…空気ばね、６……オイルダンパ、７……対象構
造物用加速度計、８……動吸振器用加速度計、１
１……乗算回路、１２……平滑回路、１３……比
較回路、１５……空気注入用電磁弁、１６……空
気注出用電磁弁。
Fig. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, Fig. 2 is a schematic diagram of a cable-stayed bridge as a representative example of a structure to be damped, and Fig. 3 is a schematic diagram of a cable-stayed bridge as a representative example of the construction situation. A perspective view showing an example of a cable-stayed bridge construction situation,
FIG. 4 is a side view showing an example of a conventional dynamic vibration absorber. 1... Horizontal beam, 3... Pendulum, 4... Weight, 5...
...Air spring, 6...Oil damper, 7...Accelerometer for target structure, 8...Accelerometer for dynamic vibration absorber, 1
1... Multiplier circuit, 12... Smoothing circuit, 13... Comparison circuit, 15... Solenoid valve for air injection, 16... Solenoid valve for air extraction.
Claims (1)
、空気ばねとオイルダンパにより振子棹の振動を
制御するようにした動吸振器において、制振対象
構造物と重錘にそれぞれ装着された加速度計と、
空気ばねに連通した空気圧調節機構と、前記２個
の加速度計の加速度信号を比較して前記空気圧調
節機構を制御する制御機構とを設け、前記空気ば
ねのばね剛性を調節することにより、制振対象構
造物と動吸振器の固有振動数を一致させ、且つこ
れ等の位相差が９０°となるように構成したこと
を特徴とする動吸振器。 In a dynamic vibration absorber, a weight is suspended from a structure to be damped via a pendulum, and the vibration of the pendulum is controlled by an air spring and an oil damper. an accelerometer,
An air pressure adjustment mechanism that communicates with the air spring and a control mechanism that compares acceleration signals from the two accelerometers to control the air pressure adjustment mechanism are provided, and the spring stiffness of the air spring is adjusted to suppress vibration. A dynamic vibration absorber characterized in that the natural frequencies of the target structure and the dynamic vibration absorber are made to match, and the phase difference between them is 90°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13483889U JPH0373742U (en) | 1989-11-22 | 1989-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13483889U JPH0373742U (en) | 1989-11-22 | 1989-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0373742U true JPH0373742U (en) | 1991-07-24 |
Family
ID=31682144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13483889U Pending JPH0373742U (en) | 1989-11-22 | 1989-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0373742U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59161566A (en) * | 1983-03-07 | 1984-09-12 | 三菱電機株式会社 | Vibration control apparatus |
| JPS60242267A (en) * | 1984-05-15 | 1985-12-02 | 三菱重工業株式会社 | Tower like structure |
| JPS63243544A (en) * | 1987-03-27 | 1988-10-11 | Nkk Corp | Control device for dynamic vibration reducer |
-
1989
- 1989-11-22 JP JP13483889U patent/JPH0373742U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59161566A (en) * | 1983-03-07 | 1984-09-12 | 三菱電機株式会社 | Vibration control apparatus |
| JPS60242267A (en) * | 1984-05-15 | 1985-12-02 | 三菱重工業株式会社 | Tower like structure |
| JPS63243544A (en) * | 1987-03-27 | 1988-10-11 | Nkk Corp | Control device for dynamic vibration reducer |