CN103572853B - Ocean platform shock mitigation system - Google Patents
Ocean platform shock mitigation system Download PDFInfo
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- CN103572853B CN103572853B CN201210256212.7A CN201210256212A CN103572853B CN 103572853 B CN103572853 B CN 103572853B CN 201210256212 A CN201210256212 A CN 201210256212A CN 103572853 B CN103572853 B CN 103572853B
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Abstract
The present invention relates to a kind of shock mitigation system, particularly relate to a kind of shock mitigation system be applied on ocean platform.Ocean platform shock mitigation system of the present invention, comprises support platform (1), and support platform (1) is connected with damping device; Described damping device comprises cross struts I (2), cross struts I (2) is fixedly connected with support platform (1), the two ends hinged vertical strut I (4) respectively of cross struts I (2), vertical strut I (4) is provided with damper I (3), and damper I (3) is hinged and vertical strut I (4) is divided into upper and lower two parts with vertical strut I (4).The ability that shock mitigation system of the present invention can make Offshore platform jacket structure entirety resist external loads increases, greatly increase and resist ice loading, unrestrained load, wind load and seismic load, the ability even resisting tsunami also strengthens greatly, offshore platform structure will be caused to destroy because of the destruction of local rod member.
Description
Technical field
The present invention relates to a kind of shock mitigation system, particularly relate to a kind of shock mitigation system be applied on ocean platform.
Background technology
Ocean platform is a kind of constructional device of ocean engineering, and it is the place that the development and utilization of marine resources provides operation on the sea and life.The economic development in the whole world more and more needs the development and utilization of marine resources, and ocean platform is as exploitative infrastructure, is in severe complicated bad border, can be subject to the effect of various load.Cause ocean platform to vibrate and destroy load mainly contains earthquake, ice carries, machine and equipment on wave, wind-force and platform.Wherein the damage capability of geological process is huge, and has unpredictability.The vibration of ocean platform can allow workman produce Psychological phobia, even can cause the fatigue failure of structure, the major disaster such as cause that platform collapses, and finally can produce great economic loss, even cause serious casualties.
China is the multiple country of an earthquake, and most offshore area is all in the strong continental plate edge of seismic activity, and the event that ocean platform destroys occurred repeatedly.In order to improve reliability and the safety of platform, Platform Vibration controls the heat subject becoming the technician of ocean engineering.
Vibration isolation technique, injects elastic vibration isolation body between vibration source and damping body, relies on its distortion to alleviate the excitation of vibration source to damping body.Basis vibration isolation is placed between structure and basis by vibration isolator, as resiliency supported, reached the object of vibration damping by rational Selecting parameter.In ocean platform vibration reducing measure, basis vibration isolation is mainly for seismic vibration, be the effective ways that restriction seismic energy enters platform upper structure, its basic skills is bottom Platform Deck and adds isolation mounting between jacket end cap, as rubber pad, damper etc.
Passive energy dissipation technology, passive energy dissipation the energy of vibration source input structure is guided into the special dissipative cell arranged absorbed and dissipate, to protect the safety of main body.This mode is obviously more much better than than the mode of traditional dissipation energy of dependence structure own.
Material damping vibration damping, the characteristic that the stress-strain plasticity hysteresis of material is mainly applied in material damping carries out the consumption of vibrational energy.In a Cyclic Stress process, the energy that during loading duration outer bound pair material institute work is greater than unloading, material is released, material converts heat energy to part energy and consumes.In general, the metal damping capacity of high strength is very low, and on the contrary, the material that damping capacity is good, usually intensity is low and expensive.Meanwhile, the damping of material is very large by the impact of temperature and vibration frequency.Therefore, should the material of choose reasonable each several part when design platform structure.
Damper vibration damping, damper vibration damping measure is in parallel on platform original structure or a series connection damper thus obtain the Damping work effect had close to bilinearity hysteretic characteristic.Conventional damper comprises frcition damper, mild steel and alloy damper, lead damper, Effects of Viscous Fluid Damper, viscoelastic damper etc.These dampers can utilize common material manufacture, and structure is relative with processing technology simple, is adapted at using in multilayer and high-rise civil engineering structure.Frcition damper itself does not have auto-reset function, and the rigidity of structure itself can only be relied on to reset.Because its coupling mechanism force immobilizes, therefore effectiveness in vibration suppression can only be played to narrower vibration frequency.
TMD and TLD system, tuned mass damper (TMD) and tuned liquid damper (TLD) are the elements utilizing the vibrational energy of electrical secondary system absorption agent structure and make agent structure vibration damping.For the vibration control theory of ocean platform and application study very active, and achieve obvious effectiveness in vibration suppression.
At present in Vibration Control of Offshore Platform, the measure that existing achievement in research mainly adopts vibration isolation and vibration isolation to combine with damper.
Vibration isolation technique arranges vibration isolator in the structure, destroys integrality and the integral rigidity of structure itself.Wind load and tsunami effect etc. are all act on whole platform structure, when loading ratio is larger, structure may be caused to be caused toppling of structure in vibration isolation place by cutting off; Again, also there is vibration source in inside configuration, namely on platform plant equipment and device vibration caused by continuous, respond lastingly.
Add damper or anti-buckling support also can play certain effectiveness in vibration suppression in inside configuration, but DeGrain, still together will play a role in conjunction with vibration isolation technique, and platform structure is inner does not have more greatly suitable position to add damper due to rigidity.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, provides a kind of ocean platform shock mitigation system, and it adds damper in ocean platform outside, realizes the shake control of ocean platform better.
For achieving the above object, the present invention adopts following technical scheme: it comprises support platform, and support platform is connected with damping device; Described damping device comprises cross struts I, cross struts I is fixedly connected with support platform, the two ends of cross struts I are hinged vertical strut I respectively, and vertical strut I is provided with damper I, and damper I is hinged and vertical strut I is divided into upper and lower two parts with vertical strut I.
Described support platform is connected on damping device, realizes the relatively described support platform of damping device by articulated structure and swing within the scope of set angle.By the setting of damper, having release destructive power, allow the function reversed, is a kind of safe and reliable, economic and practical, easy construction, simply constructed ocean platform shock mitigation system.
Damper adds the damping ratio of damping device, decrease support platform in horizontal external, dynamic response particularly under seismic force effects, damper can strengthen the energy dissipation capacity of offshore platform structure, simultaneously, the acceleration of offshore platform structure can be made obviously to diminish, to ensure the comfort level of living area staff.
Damper I is vertically arranged.
Damping device also comprises cross struts II, one end of cross struts II is fixedly connected with support platform top, the other end and vertical strut II hinged, cross struts II is provided with damper II, and damper II is hinged and cross struts II is divided into left and right two parts with cross struts II; Bottom and the cross struts I of vertical strut II are hinged.Damper II horizontally set.
Damper I and damper II adopt marmem damper or viscous damper or viscoelastic damper or frcition damper or anti-buckling supporting damping device.
Marmem (SMA), as one of intellectual material, is widely used as far back as delicate tip fields such as Aero-Space, robot, medical treatment.In recent years, due to the process technology of material and the raising of suitability for industrialized production ability, the research and apply of SMA in field of civil engineering there has also been and develop faster.Due to this material have recoverable deformation large, very large driving force can be produced when limited reply, high damping properties, anti-fatigue performance are good, and various deformation form can be realized, be easy to the advantages such as the materials such as same concrete, steel combine and day by day come into one's own, lot of domestic and foreign scholar has carried out theory and the experimental study of system to the application of SMA in field of civil engineering.Super-elasticity is one of important mechanical property of SMA, and it refers to when alloy is subject to stress, martensite reverse transformation occurs, produces the strain much larger than its superelastic, the phenomenon that strain recovers automatically when unloading.Utilize the super-elasticity of SMA and high damping characteristic can make SMA earthquake damping and isolating mechanism, suppress the response of structure under seismic loading, produce simultaneously enough restoring forces make structure recovery arrive distortion before state, thus reach the object of damper.
The principle of anti-buckling support is: the responsive to axial force that braced structures is born under geological process is all born by the core of centre of support, core surrenders power consumption under pulling force and pressure effect, and concrete in peripheral steel pipe and sleeve pipe or the bending restriction of mortar lifting supply core, flexing when avoiding core pressurized.Due to poisson effect, core can expand when pressurized, between core and mortar, be therefore provided with one deck non-cohesive material or very narrow and small air layer, avoids core to contact with tied mechanism and the frictional force caused forces constraint mechanism to bear axial force.Anti-buckling can reaching when being supported on tension and pressurized is surrendered and flexing is not occurred, more traditional is supported with more stable mechanical property, anti-buckling support through appropriate design has high rigidity and good hysteretic energy ability, therefore, buckling-restrained energy-dissipation has the advantage of common support and hysteresis type dissipative cell, has good using value.Anti-buckling support bar comprises sleeve pipe and is arranged on the central layer in sleeve pipe.Buckling restrained brace is also known as undonded prestressed concrete, that a kind of new steel structure supports, also be a kind of energy dissipation brace, the center of buckling restrained brace is central layer, complete buckling during for avoiding central layer pressurized, namely can reach surrender when tension and pressurized, central layer is placed in a sleeve pipe, then perfusion mortar in sleeve pipe.In order to reduce or eliminate central layer by the power passing to mortar during axle power, and due to poisson effect, central layer can expand in pressurized situation, and therefore heap sand pulp layer between sleeve pipe and central layer, arranges air space or non-cohesive material layer between screed and central layer.Like this, also can reach when this is supported on pressurized and surrender completely, make support compression bearing suitable with tensile capacity, overcome the defect of traditional support compressive buckling, improve support bearing ability.
The ability that shock mitigation system of the present invention can make Offshore platform jacket structure entirety resist external loads increases, greatly increase and resist ice loading, unrestrained load, wind load and seismic load, the ability even resisting tsunami also strengthens greatly, offshore platform structure will be caused to destroy because of the destruction of local rod member.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention 1 structural representations;
Fig. 2 is embodiments of the invention 2 structural representations;
Fig. 3 is the schematic diagram of embodiments of the invention 3 damper;
Fig. 4 is the schematic diagram of embodiments of the invention 4 damper;
Fig. 5 is the schematic diagram of embodiments of the invention 5 damper;
Fig. 6 is the schematic diagram of embodiments of the invention 6 damper.
In figure: 1. support platform; 2. cross struts I; 3. damper I; 4. vertical strut I; 5. cross struts II; 6. damper II; 7. oil cylinder; 8. piston rod; 9. piston; 10. outer steel plate; 11. viscoelastic layers; 12. brass backing plates; 13. middle steel plates; 14. central layers; 15. sleeve pipes; 16. screeds; 17. vertical struts II.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, ocean platform shock mitigation system of the present invention comprises support platform 1, and support platform 1 is connected with damping device; Described damping device comprises cross struts I 2, cross struts I 2 is fixedly connected with support platform 1, the two ends hinged vertical strut I 4 respectively of cross struts I 2, vertical strut I 4 is provided with damper I 3, and damper I 3 is hinged and vertical strut I 4 is divided into upper and lower two parts with vertical strut I 4.
Damper I 3 is vertically arranged, and damper I 3 adopts marmem damper.
Interpretation of result under it tunami effect: monitoring node is set in ocean platform shock mitigation system.
The displacement of each node under table 1 day tunami effect:
The acceleration of each node under table 2 day tunami effect
From table 1, table 2, under sky tunami effect, the displacement and the acceleration that add each node after damper obviously reduce, and the reduction amplitude of especially displacement is very large, and illustrate that new structural system serves good control action to sky tunami, damping effect is more satisfactory.
Interpretation of result under the effect of pressure ice power:
The displacement of each node under the effect of table 3 pressure ice power
The acceleration of each node under the effect of table 4 pressure ice power
From table 3, table 4, under the effect of pressure ice power, the displacement and the acceleration that add each node after damper obviously reduce, especially the reduction amplitude of displacement is very large, all more than 90%, illustrate that new structural system serves good control action to pressure ice power, damping effect is more satisfactory.
Embodiment 2
As shown in Figure 2, damping device also comprises cross struts II 5, one end of cross struts II 5 is fixedly connected with support platform 1 top, the other end and vertical strut II 7 hinged, cross struts II 5 is provided with damper II 6, and damper II 6 is hinged and cross struts II 5 is divided into left and right two parts with cross struts II 5; Bottom and the cross struts I 2 of vertical strut II 7 are hinged.Damper II 6 horizontally set.
Damper I 3 and damper II 6 all adopt marmem damper.
The other the same as in Example 1.
Embodiment 3
As shown in Figure 3, damper I 3 adopts viscous damper, and viscous damper comprises oil cylinder 7, is provided with piston 9 in oil cylinder 7, and the two ends of piston 9 connect piston rod 8.
The other the same as in Example 1.
Embodiment 4
As shown in Figure 4, damper I 3 and damper II 6 all adopt viscoelastic damper, and viscoelastic damper comprises outer steel plate 10, are provided with viscoelastic layer in outer steel plate 10.
The other the same as in Example 2.
Embodiment 5
As shown in Figure 5, damper I 3 adopts frcition damper, and frcition damper brass backing plate 12, is provided with middle steel plate 13 in brass backing plate 12.
The other the same as in Example 1.
Embodiment 6
As shown in Figure 6, damper I 3 adopts anti-buckling supporting damping device, and comprise sleeve pipe 15 and be arranged on the central layer 14 in sleeve pipe 15, central layer 14 is cross.Heap sand pulp layer 16 between sleeve pipe 15 and central layer 14.
The other the same as in Example 1.
Claims (6)
1. an ocean platform shock mitigation system, comprises support platform (1), it is characterized in that, support platform (1) is connected with damping device; Described damping device comprises cross struts I (2), cross struts I (2) is fixedly connected with support platform (1), the two ends hinged vertical strut I (4) respectively of cross struts I (2), vertical strut I (4) is provided with damper I (3), and damper I (3) is hinged and vertical strut I (4) is divided into upper and lower two parts with vertical strut I (4).
2. ocean platform shock mitigation system according to claim 1, is characterized in that, damper I (3) is vertically arranged.
3. ocean platform shock mitigation system according to claim 2, is characterized in that, damper I (3) adopts marmem damper or viscous damper or viscoelastic damper or frcition damper or anti-buckling supporting damping device.
4. ocean platform shock mitigation system according to claim 2, it is characterized in that, damping device also comprises cross struts II (5), one end of cross struts II (5) is fixedly connected with support platform (1) top, the other end and vertical strut II (17) hinged, cross struts II (5) is provided with damper II (6), and damper II (6) is hinged and cross struts II (5) is divided into left and right two parts with cross struts II (5); Bottom and the cross struts I (2) of vertical strut II (17) are hinged.
5. ocean platform shock mitigation system according to claim 4, is characterized in that, damper II (6) horizontally set.
6. ocean platform shock mitigation system according to claim 5, is characterized in that, damper II (6) adopts marmem damper or viscous damper or viscoelastic damper or frcition damper or anti-buckling supporting damping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210256212.7A CN103572853B (en) | 2012-07-23 | 2012-07-23 | Ocean platform shock mitigation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210256212.7A CN103572853B (en) | 2012-07-23 | 2012-07-23 | Ocean platform shock mitigation system |
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| Publication Number | Publication Date |
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| CN103572853A CN103572853A (en) | 2014-02-12 |
| CN103572853B true CN103572853B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210256212.7A Expired - Fee Related CN103572853B (en) | 2012-07-23 | 2012-07-23 | Ocean platform shock mitigation system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281307A (en) * | 2018-11-10 | 2019-01-29 | 重庆大学 | A kind of offshore jacket platforms anti-seismic structure new system containing buckling restrained brace |
| CN109455273B (en) * | 2018-11-30 | 2020-08-11 | 河海大学 | Ultra-large floating body with draft adjusting and intelligent vibration damping device |
| CN114017463B (en) * | 2021-11-09 | 2022-06-10 | 应急管理部国家自然灾害防治研究院 | Viscoelastic energy dissipater for ice vibration control of marine structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4389141A (en) * | 1980-12-31 | 1983-06-21 | Mobil Oil Corporation | Marine structure having a deck or work platform supported by absorbing mechanisms |
| CN102162231A (en) * | 2010-12-03 | 2011-08-24 | 道达(上海)风电投资有限公司 | Self-balancing platform system |
| CN202830902U (en) * | 2012-07-23 | 2013-03-27 | 青岛理工大学 | Shock mitigation system of offshore platform |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9203617A (en) * | 1992-09-16 | 1994-03-22 | Petroleo Brasileiro Sa | RETICULATED STRUCTURE WITH WIDE BASE FOR OFFSHORE PLATFORM SUPPORT |
| US5775846A (en) * | 1994-12-20 | 1998-07-07 | Seahorse Equipment Corporation | Offshore production platform and method of installing the same |
| CN102116055B (en) * | 2009-12-31 | 2012-07-04 | 上海维固工程实业有限公司 | Energy dissipation and shock absorption mechanism |
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2012
- 2012-07-23 CN CN201210256212.7A patent/CN103572853B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4389141A (en) * | 1980-12-31 | 1983-06-21 | Mobil Oil Corporation | Marine structure having a deck or work platform supported by absorbing mechanisms |
| CN102162231A (en) * | 2010-12-03 | 2011-08-24 | 道达(上海)风电投资有限公司 | Self-balancing platform system |
| CN202830902U (en) * | 2012-07-23 | 2013-03-27 | 青岛理工大学 | Shock mitigation system of offshore platform |
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Granted publication date: 20151223 Termination date: 20170723 |