CN103572853A - Ocean platform damping system - Google Patents
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- CN103572853A CN103572853A CN201210256212.7A CN201210256212A CN103572853A CN 103572853 A CN103572853 A CN 103572853A CN 201210256212 A CN201210256212 A CN 201210256212A CN 103572853 A CN103572853 A CN 103572853A
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- 238000013016 damping Methods 0.000 title claims abstract description 36
- 230000035939 shock Effects 0.000 claims abstract description 20
- 239000006096 absorbing agent Substances 0.000 claims abstract 4
- 238000010521 absorption reaction Methods 0.000 claims 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims 2
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- 230000000694 effects Effects 0.000 description 19
- 239000000463 material Substances 0.000 description 16
- 238000002955 isolation Methods 0.000 description 10
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- 238000000034 method Methods 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 4
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- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
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- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
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- 229910000734 martensite Inorganic materials 0.000 description 1
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Abstract
本发明涉及一种减震系统，尤其涉及一种应用在海洋平台上的减震系统。本发明的海洋平台减震系统，包括支撑平台（1），支撑平台（1）与减震装置连接；所述的减震装置包括横向撑杆Ⅰ（2），横向撑杆Ⅰ（2）与支撑平台（1）固定连接，横向撑杆Ⅰ（2）的两端分别铰接竖向撑杆Ⅰ（4），竖向撑杆Ⅰ（4）上设有阻尼器Ⅰ（3），阻尼器Ⅰ（3）与竖向撑杆Ⅰ（4）铰接且将竖向撑杆Ⅰ（4）分成上下两部分。本发明的减震系统可使导管架式海洋平台结构整体抵御外部荷载的能力增加，大大增加抵御冰荷载、浪荷载、风荷载以及地震荷载，甚至抵御海啸的能力也大大增强，不会因局部杆件的破坏而导致海洋平台结构破坏。
The invention relates to a shock absorbing system, in particular to a shock absorbing system applied on an ocean platform. The offshore platform damping system of the present invention includes a support platform (1), and the support platform (1) is connected with a shock absorber; the shock absorber includes a transverse strut I (2), a transverse strut I (2) and The supporting platform (1) is fixedly connected, and the two ends of the horizontal strut I (2) are respectively hinged to the vertical strut I (4). The vertical strut I (4) is provided with a damper I (3), and the damper I (3) It is hinged with the vertical strut I (4) and divides the vertical strut I (4) into upper and lower parts. The shock absorbing system of the present invention can increase the overall ability of the jacket type offshore platform structure to resist external loads, greatly increase the ability to resist ice loads, wave loads, wind loads, and earthquake loads, and even greatly enhance the ability to resist tsunamis without local damage. The damage of the rods leads to the structural damage of the offshore platform.
Description
Technical field
The present invention relates to a kind of shock mitigation system, relate in particular to a kind of shock mitigation system being applied on ocean platform.
Background technology
Ocean platform is a kind of constructional device of ocean engineering, and the development and utilization that it is marine resources provides the place of 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, in the bad border in severe complexity, can be subject to the effect of various loads.Cause that ocean platform vibration and the load destroying mainly contain that earthquake, ice are carried, the 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, and the major disaster such as cause that platform collapses finally can produce great economic loss, even causes serious casualties.
China is a country that earthquake is multiple, and most offshore areas are 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 is controlled the technician's who becomes ocean engineering heat subject.
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 that vibration isolator is placed between structure and basis, as resiliency supported, selects to reach the object of vibration damping by rational parameter.In ocean platform vibration reducing measure, basis vibration isolation is mainly for seismic vibration, be that restriction seismic energy enters the effective ways of platform superstructure, its basic skills is to add isolation mounting between Platform Deck bottom and jacket end cap, as rubber pad, damper etc.
Passive energy dissipation technology, passive energy dissipation is that the dissipative cell of guiding the energy of vibration source input structure into special setting is absorbed and dissipates, 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, material damping is mainly that the characteristic of the stress-strain plasticity hysteresis of application material is carried out the consumption of vibrational energy.In a Cyclic Stress process, the outer bound pair material of loading duration institute work is greater than the energy that material is emitted during unloading, and material consumes part energy energy transform into heat energy.In general, high-intensity metal damping capacity is very low, on the contrary, the material that damping capacity is good, usually intensity is low and expensive.Meanwhile, the damping of material is subject to the impact of temperature and vibration frequency very large.Therefore material that, should choose reasonable each several part when design platform structure.
Damper vibration damping, thus damper vibration damping measure is in parallel on platform original structure or the damper acquisition of connecting has the Damping work effect that approaches 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, are adapted at using in multilayer and high-rise civil engineering structure.Itself does not have auto-reset function frcition damper, can only rely on the rigidity of structure itself to reset.Because its coupling mechanism force immobilizes, therefore can only play effectiveness in vibration suppression to narrower vibration frequency.
TMD and TLD system, tuned mass damper (TMD) and tuned liquid damper (TLD) are to utilize electrical secondary system to absorb the vibrational energy of agent structure and the element that makes agent structure vibration damping.Vibration control theory and application study for ocean platform are very active, and have obtained obvious effectiveness in vibration suppression.
In Vibration Control of Offshore Platform, existing achievement in research is mainly the measure that adopts vibration isolation and vibration isolation to combine with damper at present.
Vibration isolation technique is that vibration isolator is set in structure, has destroyed integrality and the integral rigidity of structure itself.Wind load and tsunami effect etc. are all to act on whole platform structure, when loading ratio is larger, may cause structure cut off and cause toppling of structure in vibration isolation place; Again, also there is vibration source in inside configuration, i.e. caused continuously, the response lastingly of plant equipment and device vibration on platform.
In inside configuration, add damper or anti-buckling support also can be played certain effectiveness in vibration suppression, but DeGrain still will together play a role in conjunction with vibration isolation technique, and damper because having more greatly suitable position, rigidity is added in platform structure inside.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, and a kind of ocean platform shock mitigation system is provided, and it,, at the outside damper that adds of ocean platform, is realized better the vibrations of ocean platform and control.
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 and vertical strut I are hinged and vertical strut I is divided into upper and lower two parts.
Described support platform is connected on damping device, by articulated structure, realizes the relatively described support platform of damping device and swing within the scope of set angle.By the setting of damper, there is release destructive power, the function of allow reversing, is a kind of safe and reliable, economic and practical, easy construction, simply constructed ocean platform shock mitigation system.
Damper has increased the damping ratio of damping device, reduced support platform in horizontal external, the dynamic response under seismic force effects particularly, damper can strengthen the energy dissipation capacity of offshore platform structure, simultaneously, can make the acceleration of offshore platform structure obviously diminish, to guarantee living area staff's comfort level.
Damper I vertically arranges.
Damping device also comprises cross struts II, one end of cross struts II is fixedly connected with support platform top, the other end is hinged with vertical strut II, and cross struts II is provided with damper II, and damper II and cross struts II are hinged and cross struts II is divided into left and right two parts; 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 accurate leading-edge fields such as Aero-Space, robot, medical treatment.In recent years, due to the raising of process technology and the suitability for industrialized production ability of material, the research of SMA in field of civil engineering has also had development faster with application.Because this material has, recoverable deformation is large, to produce very large driving force, high damping properties, anti-fatigue performance when the limited reply good, and can realize various deformation form, 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 to SMA the application in field of civil engineering carried out theory and the experimental study of system.Super-elasticity is one of important mechanical property of SMA, and it refers to when alloy is subject to stress, and martensite reverse transformation occurs, and produces the strain much larger than its super-elasticity limit, the phenomenon that strain recovers automatically when unloading.Utilize super-elasticity and the high damping characteristic of SMA can make SMA earthquake damping and isolating mechanism, suppress the response of structure under seismic loading, produce enough restoring forces simultaneously and make structure recovery arrive the state before distortion, thereby 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 is surrendered power consumption under pulling force and pressure-acting, and concrete in peripheral steel pipe and sleeve pipe or mortar lifting are supplied with the crooked restriction of core, flexing while avoiding core pressurized.Due to poisson effect, core can expand the in the situation that of pressurized, therefore between core and mortar, is 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 that causes forces constraint mechanism to bear axial force.Anti-bucklingly can reach surrender while being supported on tension and pressurized and flexing does not occur, more traditional be 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 advantages 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 claims again to support without bonding, that a kind of new steel structure supports, also be that a kind of power consumption is supported, the center of buckling restrained brace is central layer, complete buckling when avoiding central layer pressurized, when tension and pressurized, can reach surrender, central layer is placed in a sleeve pipe, then perfusion mortar in sleeve pipe.In order to reduce or to eliminate the power of passing to mortar when central layer is subject to axle power, and due to poisson effect, central layer can expand in pressurized situation, therefore between sleeve pipe and central layer, fills screed, and airspace layer or non-cohesive material layer are set between screed and central layer.Like this, when this is supported on pressurized, also can reach completely surrender, make to support compression bearing and tensile capacity is suitable, overcome the defect of traditional support pressurized flexing, improve support bearing ability.
The ability that shock mitigation system of the present invention can make jacket offshore platform structural entity resist external loads increases, greatly increase and resist ice loading, unrestrained load, wind load and seismic load, the ability of even resisting tsunami also strengthens greatly, can not cause because of the destruction of local rod member offshore platform structure to destroy.
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 dampers;
Fig. 4 is the schematic diagram of embodiments of the invention 4 dampers;
Fig. 5 is the schematic diagram of embodiments of the invention 5 dampers;
Fig. 6 is the schematic diagram of embodiments of the invention 6 dampers.
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 strut II.
The specific embodiment
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 of cross struts I 2 are hinged vertical strut I 4 respectively, vertical strut I 4 is provided with damper I 3, and damper I 3 and vertical strut I 4 are hinged and vertical strut I 4 is divided into upper and lower two parts.
Damper I 3 vertically arranges, and damper I 3 adopts marmem damper.
Interpretation of result under it tunami effect: in ocean platform shock mitigation system, monitoring node is set.
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, after interpolation damper, displacement and the acceleration of each node obviously reduce, and especially the amplitude that reduces of displacement is very large, illustrates that new structural system has played good control action to sky tunami, and 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, after interpolation damper, displacement and the acceleration of each node obviously reduce, especially the amplitude that reduces of displacement is very large, all, more than 90%, illustrate that new structural system has played good control action to pressure ice power, damping effect is more satisfactory.
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 is hinged with vertical strut II 7, cross struts II 5 is provided with damper II 6, and damper II 6 and cross struts II 5 are hinged and cross struts II 5 is divided into left and right two parts; Bottom and the cross struts I 2 of vertical strut II 7 are hinged.Damper II 6 horizontally sets.
Damper I 3 and damper II 6 all adopt marmem damper.
The other the same as in Example 1.
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.
As shown in Figure 4, damper I 3 and damper II 6 all adopt viscoelastic damper, and viscoelastic damper comprises outer steel plate 10, in outer steel plate 10, are provided with viscoelastic layer.
The other the same as in Example 2.
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.
As shown in Figure 6, damper I 3 adopts anti-buckling supporting damping device, comprises sleeve pipe 15 and is arranged on the central layer 14 in sleeve pipe 15, and central layer 14 is cross.Between sleeve pipe 15 and central layer 14, fill screed 16.
The other the same as in Example 1.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210256212.7A CN103572853B (en) | 2012-07-23 | 2012-07-23 | Ocean platform damping system |
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| CN201210256212.7A CN103572853B (en) | 2012-07-23 | 2012-07-23 | Ocean platform damping system |
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| CN103572853A true CN103572853A (en) | 2014-02-12 |
| CN103572853B CN103572853B (en) | 2015-12-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281307A (en) * | 2018-11-10 | 2019-01-29 | 重庆大学 | A new seismic structure system of jacket offshore platform with buckling restraint support |
| CN109455273A (en) * | 2018-11-30 | 2019-03-12 | 河海大学 | A kind of Very large floating structure of configuration drinking water adjusting and intelligent vibration absorber |
| CN112281791A (en) * | 2020-11-20 | 2021-01-29 | 大连理工大学 | Underwater energy dissipation and shock absorption device with horizontally symmetrical double umbrella covers |
| CN114017463A (en) * | 2021-11-09 | 2022-02-08 | 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 |
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| 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 |
| CN1084923A (en) * | 1992-09-16 | 1994-04-06 | 巴西石油公司 | The band that supports ocean platform is widened the jacket structure of base |
| EP0795648A2 (en) * | 1996-03-11 | 1997-09-17 | Seahorse Equipment Corporation | Offshore production platform |
| CN102116055A (en) * | 2009-12-31 | 2011-07-06 | 上海维固工程实业有限公司 | Energy dissipation and shock absorption mechanism |
| 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 | Ocean platform damping system |
-
2012
- 2012-07-23 CN CN201210256212.7A patent/CN103572853B/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| CN1084923A (en) * | 1992-09-16 | 1994-04-06 | 巴西石油公司 | The band that supports ocean platform is widened the jacket structure of base |
| EP0795648A2 (en) * | 1996-03-11 | 1997-09-17 | Seahorse Equipment Corporation | Offshore production platform |
| CN102116055A (en) * | 2009-12-31 | 2011-07-06 | 上海维固工程实业有限公司 | Energy dissipation and shock absorption mechanism |
| 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 | Ocean platform damping system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109281307A (en) * | 2018-11-10 | 2019-01-29 | 重庆大学 | A new seismic structure system of jacket offshore platform with buckling restraint support |
| CN109455273A (en) * | 2018-11-30 | 2019-03-12 | 河海大学 | A kind of Very large floating structure of configuration drinking water adjusting and intelligent vibration absorber |
| CN112281791A (en) * | 2020-11-20 | 2021-01-29 | 大连理工大学 | Underwater energy dissipation and shock absorption device with horizontally symmetrical double umbrella covers |
| CN114017463A (en) * | 2021-11-09 | 2022-02-08 | 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 |
| 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 |
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