机动式高架栈桥在风浪耦合作用下的位移响应
|
摘要
针对机动式高架栈桥的特点,采用分离涡方法模拟湍流,基于任意拉格朗日-欧拉方法(ALE ArbitraryLagrangian Eulerian)求解流固耦合,对栈桥系统的风浪耦合位移响应过程进行了三维数值模拟分析。结果表明:风浪耦合作用下高架栈桥的运动以平动为主,传统的简单叠加算法会产生较大误差;波浪频率若接近高架栈桥的固有频率,可引起强烈的共振效应,此时结构在风浪耦合作用下的位移响应远大于仅受波浪荷载时的响应;若波浪频率与高架栈桥固有频率相差较大,则结构在风浪耦合作用下的线位移响应小于两种荷载单独作用下的线位移响应之和,但对角位移影响不大。
In order to investigate the property of flexible overhead trestle bridge,the detached eddy simulation method was employed to simulate turbulence,and ALE(arbitrary Lagrangian Eulerian) method was adopted to solve fluid structure interaction.The 3D displacement responding process of trestle bridge system subjected to wind and wave was simulated.The results show that the angular movement of trestle bridge is very small and can be ignored.The traditional simple superposition method,which is used to compute displacement response of trestle bridge,may lead to big error.If wave frequency is close to trestle bridge's natural frequency,strong sympathetic vibration will be induced and the displacement response of trestle bridge subjected to coupling of the two loads is much bigger than only to wave load.In contrast,if wave frequency is quite different from trestle bridge's natural frequency,then the linear displacement response subjected to the coupling of the two loads is smaller than the summation of responses to each of the two single loads,but the amplitude of angular displacement response is almost the same whether considering coupling of wind and wave or not.
In order to investigate the property of flexible overhead trestle bridge,the detached eddy simulation method was employed to simulate turbulence,and ALE(arbitrary Lagrangian Eulerian) method was adopted to solve fluid structure interaction.The 3D displacement responding process of trestle bridge system subjected to wind and wave was simulated.The results show that the angular movement of trestle bridge is very small and can be ignored.The traditional simple superposition method,which is used to compute displacement response of trestle bridge,may lead to big error.If wave frequency is close to trestle bridge's natural frequency,strong sympathetic vibration will be induced and the displacement response of trestle bridge subjected to coupling of the two loads is much bigger than only to wave load.In contrast,if wave frequency is quite different from trestle bridge's natural frequency,then the linear displacement response subjected to the coupling of the two loads is smaller than the summation of responses to each of the two single loads,but the amplitude of angular displacement response is almost the same whether considering coupling of wind and wave or not.
引文
[1]尹洪波.风浪耦合作用下高架栈桥动态响应研究[D].南京:解放军理工大学,2009.
[2]徐万海,曾晓辉,吴应湘,等.深水张力腿平台与系泊系统的耦合动力响应[J].振动与冲击,2009,28(2):145-150.
[3]Bisht R S,Jain A K.Wind and wave induced behaviour ofoffshore guyed tower platforms[J].Ocean Engineering,1998,25(7):501-519.
[4]Datta T K,Jain A K.Response of articulated tower platformsto random wind and wave forces[J].Computers andStructures,1990,34(l):137-144.
[5]钱景峰.随机风浪作用下结构的动力响应分析方法研究[D].大连:大连理工大学,2010.
[6]刘高,吴宏波,黄李骥,等.长大桥梁关键技术综述[J].公路,2009,5:53-64.
[7]Spalart P R,Jou W H,Strelets M,et al.Comments on thefeasibility of LES for wings and on hybrid RANS/LESapproach.∥Advances in DNS/LES,First AFOSRInternational Conference on DNS and LES[C].Ruston,LA,USA,1997.
[8]Saric S,et a1.A periodically perturbed backward-facing stepflow by means of LES,DES and T-RANS:an example of flowseparation control[J].Journal of Fluids Engineering,2005,127(5):879-887.
[9]Aroon K V,Danesh K T.Detached eddy simulation ofturbulent flow and heat transfer in a ribbed duct[J].Journalof Fluids Engineering,2005,27:888-896.
[10]Claus M P,Morton S A,Cummings R M,et al.DESturbulence modeling on the C-130 comparison betweencomputational and experimental results[R].AIAA 2005-884,2005.
[11]陈国兴,席仁强,王志华.考虑流固耦合的桥墩地震反应方法[J].防灾减灾工程学报,2010,30(1):1-9.
[12]方平治,杜明侠,顾明.两自由度椭圆柱体涡激振动的数值模拟[J].振动与冲击,2009,28(1):51-55.
[13]Menter F R.Zonal two equation k-ωturbulence models foraerodynamic flow[R].AIAA,93-2906,1993.
[14]Tamura T,Itoh Y.Three-dimensional vortical flows around abluff cylinder in unstable oscillation[J].J.Wind Eng.Indus.Aerodyn.,1997,67-68:141-154.
[15]孙芦忠,尹洪波,李霞,等.基于大涡模拟的高架栈桥断面风载分析[J].港工技术,2008,184(6):5-9.
[2]徐万海,曾晓辉,吴应湘,等.深水张力腿平台与系泊系统的耦合动力响应[J].振动与冲击,2009,28(2):145-150.
[3]Bisht R S,Jain A K.Wind and wave induced behaviour ofoffshore guyed tower platforms[J].Ocean Engineering,1998,25(7):501-519.
[4]Datta T K,Jain A K.Response of articulated tower platformsto random wind and wave forces[J].Computers andStructures,1990,34(l):137-144.
[5]钱景峰.随机风浪作用下结构的动力响应分析方法研究[D].大连:大连理工大学,2010.
[6]刘高,吴宏波,黄李骥,等.长大桥梁关键技术综述[J].公路,2009,5:53-64.
[7]Spalart P R,Jou W H,Strelets M,et al.Comments on thefeasibility of LES for wings and on hybrid RANS/LESapproach.∥Advances in DNS/LES,First AFOSRInternational Conference on DNS and LES[C].Ruston,LA,USA,1997.
[8]Saric S,et a1.A periodically perturbed backward-facing stepflow by means of LES,DES and T-RANS:an example of flowseparation control[J].Journal of Fluids Engineering,2005,127(5):879-887.
[9]Aroon K V,Danesh K T.Detached eddy simulation ofturbulent flow and heat transfer in a ribbed duct[J].Journalof Fluids Engineering,2005,27:888-896.
[10]Claus M P,Morton S A,Cummings R M,et al.DESturbulence modeling on the C-130 comparison betweencomputational and experimental results[R].AIAA 2005-884,2005.
[11]陈国兴,席仁强,王志华.考虑流固耦合的桥墩地震反应方法[J].防灾减灾工程学报,2010,30(1):1-9.
[12]方平治,杜明侠,顾明.两自由度椭圆柱体涡激振动的数值模拟[J].振动与冲击,2009,28(1):51-55.
[13]Menter F R.Zonal two equation k-ωturbulence models foraerodynamic flow[R].AIAA,93-2906,1993.
[14]Tamura T,Itoh Y.Three-dimensional vortical flows around abluff cylinder in unstable oscillation[J].J.Wind Eng.Indus.Aerodyn.,1997,67-68:141-154.
[15]孙芦忠,尹洪波,李霞,等.基于大涡模拟的高架栈桥断面风载分析[J].港工技术,2008,184(6):5-9.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心