势流体和Housner模型动力研究比较  

Comparative study on dynamic behaviors of potential model and Housner model

作　　者：丁晓唐[1] 刘广 王姗姗 蒋勇[1] 

机构地区：[1]河海大学土木与交通学院,南京210098 [2]中国市政工程中南设计研究总院,武汉430010 [3]江河水利水电咨询中心,北京100120

出　　处：《水力发电学报》2011年第6期57-61,共5页Journal of Hydroelectric Engineering

摘　　要：势流体假设流体无黏、无旋、无热转换、不可压缩且流体域的边界运动很小,计算中仅包括未知量—速度势;Housner模型采用等效弹簧质量系统来模拟流体对结构的压力作用;两种模型在流-固耦合中都偏重流体对结构的作用研究。三维渡槽体系流-固耦合模态分析表明,两种模型的振动都是从流体开始的;结构前五阶动力特性是一致的,Housner模型的振动频率偏低;动力时程分析可知,Housner模型结构动力响应偏大,结果较安全。The potential fluid model assumes that fluid is incompressible and has no viscosity,no whirling and no heat transfer,and that fluid velocity near a boundary is small.For this model,the unknown variable to be calculated is velocity potential only.Housner model uses equivalent spring mass system to simulate the effects of fluid pressure on the structure.In analysis of fluid-solid coupling,actually both models focus more on the effect of fluid acting on the structure.A 3-D dynamic analysis of fluid-solid coupling of an aqueduct system suggests that fluid vibration in the calculations by the two models appears earlier than the actual case.The first five modes of structure dynamics simulated by the two models are the same,while vibration frequencies of Housner model are lower.The structure dynamic responses of Housner model are stronger,and thus the resulting decision would be safer.

关 键 词：振动与波 动力分析 流固耦合 势流体 Housner模型 渡槽 

分 类 号：TV312[水利工程—水工结构工程]