GB1322807A - Vibration damping of rigidly based structures - Google Patents
Vibration damping of rigidly based structuresInfo
- Publication number
- GB1322807A GB1322807A GB1322807DA GB1322807A GB 1322807 A GB1322807 A GB 1322807A GB 1322807D A GB1322807D A GB 1322807DA GB 1322807 A GB1322807 A GB 1322807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- tank
- natural frequency
- tuned
- tanks
- 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
- 238000013016 damping Methods 0.000 title abstract 3
- 239000007788 liquid Substances 0.000 abstract 9
- 230000010355 oscillation Effects 0.000 abstract 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- 239000004677 Nylon Substances 0.000 abstract 1
- 238000004378 air conditioning Methods 0.000 abstract 1
- 229920001778 nylon Polymers 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/08—Lighting devices intended for fixed installation with a standard
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V15/00—Protecting lighting devices from damage
- F21V15/04—Resilient mountings, e.g. shock absorbers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
1322807 Chimneys NATIONAL RESEARCH DEVELOPMENT CORP 29 Nov 1971 [30 Nov 1970 31 March 1971] 56710/70 and 8282/71 Heading F4J [Also in Division F2] To dampen vibrations of a structure fixed to a support secured to or provided by the ground or the seabed, e.g. transverse vibrations of a mast, smoke stack, tall building 10 or oil industry conductor-tube, it is provided with at least one tank 14 containing a mass of liquid 16 free to oscillate across the tank(s) with a natural frequency similar to that of (or of a principal mode of) the structure, the dimensions and shape of the tank(s) and the liquid depth are such that the liquid motion under resonance conditions will lag 90 degrees behind that of the structure and the forces exerted by the liquid will be in anti-phase to corresponding frequency components in the forces exciting the structure. The liquid 16 may be water for an air-conditioning system, a calcium chloride solution or oil. The natural frequency of the structure in the direction of liquid oscillation may be twice the tank dimension in that direction divided by #gh where h is the liquid depth. The tank or tanks may be at an antinode of the structure's oscillation and symmetrical about a vertical axis of symmetry of the structure. The ratio of natural damping to that necessary to prevent oscillation, for the structure, may be less than 0À05. Two or more of the damping systems may be used and may be dissimilar. They may all be tuned to the natural frequency of the structure or one or more may be so tuned and the remainder to higher modes. Inclined baffles (18) of perforated plate or woven nylon or stainless steel are mounted in the tank 14 on the walls to overhang the liquid 16 for curbing splash and noise. The tank may be of circular section and mounted around a rigidlybased chimney stack to provide an annular liquid space possibly containing submerged weirs (40). There may be coaxial annular tanks (one tuned to a frequency mode other than the natural frequency) or a symmetrical arrangement of circular tanks around the stack.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5671070 | 1970-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1322807A true GB1322807A (en) | 1973-07-11 |
Family
ID=10477340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1322807D Expired GB1322807A (en) | 1970-11-30 | 1970-11-30 | Vibration damping of rigidly based structures |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1322807A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2376342A1 (en) * | 1976-12-29 | 1978-07-28 | Brewer Eng Lab | VIBRATION ABSORPTION ELEMENT |
| GB2194017A (en) * | 1986-08-06 | 1988-02-24 | Shimizu Construction Co Ltd | Suppressing vibration of a structure |
| FR2623226A1 (en) * | 1987-11-17 | 1989-05-19 | Shimizu Construction Co Ltd | APPARATUS FOR MITIGATING VIBRATION OF A STRUCTURE |
| GB2212592A (en) * | 1987-11-17 | 1989-07-26 | Shimizu Construction Co Ltd | Suppressing vibration of a structure |
| US4922671A (en) * | 1987-11-17 | 1990-05-08 | Shimizu Construction Co., Ltd. | Method for effectively restraining response of a structure to outside disturbances and apparatus therefor |
| US4924639A (en) * | 1987-04-27 | 1990-05-15 | Shimizu Construction Co., Ltd. | Method for restraining vibration of a floor and apparatus therefor |
| US4951441A (en) * | 1987-12-01 | 1990-08-28 | Mitshi Kensetsu Kabushiki Kaisha | Damping device in a structure and damping construction and damping method using those devices |
| US5016409A (en) * | 1987-04-28 | 1991-05-21 | Shimizu Construction Co., Ltd. | Method for restraining response of a structure to outside disturbances and apparatus therefor |
| EP1471303A2 (en) * | 2003-04-24 | 2004-10-27 | Maass, Christian | Device for extending the life expenditure of lighting means |
| US7881420B2 (en) | 2004-06-04 | 2011-02-01 | General Electric Company | Method and apparatus for reducing vibration in component of a nuclear reactor |
| CN105672514A (en) * | 2016-03-10 | 2016-06-15 | 苏州科技学院 | Vortex vibration energy consumption type tuned liquid damper |
| US11124984B2 (en) | 2019-08-26 | 2021-09-21 | Turris Corp. | System and method of damping vibrations of tower structures |
-
1970
- 1970-11-30 GB GB1322807D patent/GB1322807A/en not_active Expired
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2376342A1 (en) * | 1976-12-29 | 1978-07-28 | Brewer Eng Lab | VIBRATION ABSORPTION ELEMENT |
| GB2194017A (en) * | 1986-08-06 | 1988-02-24 | Shimizu Construction Co Ltd | Suppressing vibration of a structure |
| GB2194017B (en) * | 1986-08-06 | 1991-01-23 | Shimizu Construction Co Ltd | Device for suppressing vibration of structure |
| US4924639A (en) * | 1987-04-27 | 1990-05-15 | Shimizu Construction Co., Ltd. | Method for restraining vibration of a floor and apparatus therefor |
| US5016409A (en) * | 1987-04-28 | 1991-05-21 | Shimizu Construction Co., Ltd. | Method for restraining response of a structure to outside disturbances and apparatus therefor |
| US4875313A (en) * | 1987-11-17 | 1989-10-24 | Shimizu Construction Co., Ltd. | Device for suppressing vibration of structure |
| US4873798A (en) * | 1987-11-17 | 1989-10-17 | Shimizu Construction Co., Ltd. | Apparatus for suppressing vibration of structure |
| US4922671A (en) * | 1987-11-17 | 1990-05-08 | Shimizu Construction Co., Ltd. | Method for effectively restraining response of a structure to outside disturbances and apparatus therefor |
| GB2212593A (en) * | 1987-11-17 | 1989-07-26 | Shimizu Construction Co Ltd | Suppressing vibrations of a structure |
| GB2212593B (en) * | 1987-11-17 | 1992-04-15 | Shimizu Construction Co Ltd | Apparatus for suppressing vibration of structure |
| GB2212592B (en) * | 1987-11-17 | 1991-05-22 | Shimizu Construction Co Ltd | Device for suppressing vibration of structure |
| GB2212592A (en) * | 1987-11-17 | 1989-07-26 | Shimizu Construction Co Ltd | Suppressing vibration of a structure |
| FR2623226A1 (en) * | 1987-11-17 | 1989-05-19 | Shimizu Construction Co Ltd | APPARATUS FOR MITIGATING VIBRATION OF A STRUCTURE |
| US4987710A (en) * | 1987-12-01 | 1991-01-29 | Mitsui Kensetsu Kabushiki Kaisha | Damping device in a structure and damping construction and damping method using those devices |
| US4972636A (en) * | 1987-12-01 | 1990-11-27 | Mitsui Kensetsu Kabushiki Kaisha | Damping device in a structure |
| US5074086A (en) * | 1987-12-01 | 1991-12-24 | Mitsui Kensetsu Kabushiki Kaisha | Damping device in a structure and damping construction and damping method using those devices |
| US4951441A (en) * | 1987-12-01 | 1990-08-28 | Mitshi Kensetsu Kabushiki Kaisha | Damping device in a structure and damping construction and damping method using those devices |
| EP1471303A2 (en) * | 2003-04-24 | 2004-10-27 | Maass, Christian | Device for extending the life expenditure of lighting means |
| EP1471303A3 (en) * | 2003-04-24 | 2008-02-27 | Maass, Christian | Device for extending the life expenditure of lighting means |
| US7881420B2 (en) | 2004-06-04 | 2011-02-01 | General Electric Company | Method and apparatus for reducing vibration in component of a nuclear reactor |
| CN105672514A (en) * | 2016-03-10 | 2016-06-15 | 苏州科技学院 | Vortex vibration energy consumption type tuned liquid damper |
| CN105672514B (en) * | 2016-03-10 | 2017-11-28 | 苏州科技学院 | Whirlpool shakes consuming type tuned liquid damper, TLD, tuned sloshing damper |
| US11124984B2 (en) | 2019-08-26 | 2021-09-21 | Turris Corp. | System and method of damping vibrations of tower structures |
| US20210372155A1 (en) * | 2019-08-26 | 2021-12-02 | Turris Corp. | System and method of damping vibrations of tower structures |
| US11459783B2 (en) * | 2019-08-26 | 2022-10-04 | Turris Corp. | System and method of damping vibrations of tower structures |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |