乌江悬索桥抖振响应时域分析
摘要
乌江特大桥是一座大跨度、高柔的悬索桥结构,对风荷载的作用十分敏感,需要进行抗风分析。文章采用大型通用有限元软件ANSYS建立了乌江特大悬索桥的三维有限元模型,运用Matlab科学计算软件自编程序模拟脉动风速时程,然后根据准定常理论计算抖振力时程,最后根据时域内的时程分析方法求得抖振时域分析的结果。分析结果为乌江悬索桥的抗风设计提供了依据,可作为设计的参考。
引文
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[2] G.Deodatis.Simulation of ergodic multivariate stochastic processes.J.Engineering Mechanics,ASCE,1996,122(8):778,787
[3] M.Shinozuka,C.B.Yun,H.Seya.Stochastic methods in wind engineering.J.Wind Engineering and Industrial Aerodynamics.1990(36):829,843
[4] N.N.Minth,T.Miyata,H,Yamada,Y.Sanada.Numerical simulation of wind turb-ulence and buffeting analysis of long-span bridges.J.Wind Engineering and IndustrialAero dynamics,1990,83:301-315
[5] JTG/T D60-01-2004 公路桥梁抗风设计规范[S].北京:人民交通出版社,2004.
[6] R.H.Scanlan.The action of flexible bridges under wind.Ⅱ:buffeting theory.J.Sound and Vibration,1978,60(2):201-211.
[7] X,Z,Chen,M.Matsumoto,A.Kareem.Aerodynamic coupling effects on flutter and buffeting of bridges,J,Engng.Mech,2000,126(1):17-26.