风场中长单索结构流固耦合效应的动力学分析  

Dynamical Analysis of Fluid-structure Interaction for Long Single Cable Structures in Wind

作　　者：王春江[1] 陈锋[1] 周岱[1] 

机构地区：[1]上海交通大学土木工程系,上海200240

出　　处：《力学季刊》2010年第2期213-219,共7页Chinese Quarterly of Mechanics

基　　金：高等学校博士学科点专项科研基金项目(200802480056)

摘　　要：本文介绍了长单索结构的风致振动现象及传统单索动力计算方法,分析了进行流固耦合计算的必要性。详细阐述了流固耦合的基本理论和方法,并介绍了有限元软件ANSYS的流固耦合计算流程。根据两种工况下的流固耦合算例分析,给出了长单索结构跨中节点的位移、应力以及索表面风压等物理量的时程曲线,通过对不同工况以及不同流场模型的模拟和分析比较,探讨了基于流固耦合分析的长单索结构风致振动响应的特点,对长单索结构的风致振动分析和设计具有参考意义。The wind-induced vibration of long single cable structures and the traditional dynamic analysis methods were introduced,and the necessary condition of fluid-structure interaction（FSI） analysis was given for long single cable structures.The basic theories and methods of FSI were discussed in details and the FSI analysis procedure of ANSYS was presented.Some examples of FSI analysis for long single cable structures in two working conditions were discussed,and also the time-history curves of displacement,stress and pressure distribution of mid-span of single cable were given and analysized comparatively.The characteristics of wind-induced vibration for long cable structures based on FSI analysis were studied.The discussion is useful to the wind-induced vibration analysis and design for long single cable structures.

关 键 词：索结构 风致振动 流固耦合 湍流模型 

分 类 号：TU311[建筑科学—结构工程] O35[理学—流体力学]