黏弹性Winkler地基梁的振动特性分析  

Analysis of vibrations of beams on viscoelastic winkler foundations

作　　者：彭丽[1] 陈春霞[1] 

机构地区：[1]上海师范大学建筑工程学院,上海201418

出　　处：《上海师范大学学报（自然科学版）》2012年第6期586-589,共4页Journal of Shanghai Normal University(Natural Sciences)

基　　金：上海师范大学青年教师基金(SK200875)

摘　　要：运用复模态分析研究了有限长黏弹性Winkler地基梁的振动特性,得出简支边界条件下的复频率方程和复模态函数表达式.通过具体算例,分析了黏弹性Winkler地基梁的固有频率和模态函数的特征,以及梁的刚度系数和地基黏性系数对固有频率和模态函数的影响.The complex modal analysis is applied to investigate vibrations of finite beams on viscoelastic Winkler foundations. The complex frequency equations and modal functions are obtained under simply supported boundary conditions. The characteris- tics of natural frequencies and mode functions of the viscoelastic Winkler foundation beams, as well as the impact of the beam stiffness coefficient and the foundation viscosity on natural frequencies and mode functions are analyzed through specific numerical examples.

关 键 词：黏弹性 地基梁 固有频率 模态函数 复模态分析法 

分 类 号：O32[理学—一般力学与力学基础]