模拟范围对水电站机组支承结构动力特性的影响研究  

Study on influence of simulation range on dynamical character of hydraulic machine supporting structure

作　　者：秦亮[1] 练继建[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《武汉大学学报（工学版）》2005年第6期58-61,76,共5页Engineering Journal of Wuhan University

基　　金：高等学校博士学科点专项科研基金项目(20020056029)资助

摘　　要：对于水电站机组支承结构而言,模拟范围愈大,计算出的自振频率愈低.为了确定合理的模拟范围,根据工程实例,针对机组段之间分缝的坝后式厂房,分别从有限元计算和结构动力学推导两个方面分析了模拟范围对机组支承结构动力特性的计算结果的影响,指出常规模拟方式存在的问题和合理的结构模型应包括的范围.In calculation of dynamical character of supporting structure in the powerhouse of hydropower station, the simulation range is larger and the value of the natural vibration frequency is less. To determine the simulation range for getting the correct result, this paper deals with the influence of simulation range on dynamical character of supporting structure from the aspects of FEM and structural dynamics basing on the practical project; and points out the problems that existed in the normal simulation method and the reasonable simulation range.

关 键 词：水电站 支承结构 模拟范围 动力特性 自振频率 

分 类 号：TV7[水利工程—水利水电工程]