具有区间参数的智能桁架结构自振特性分析  

FREE VIBRATION ANALYSIS OF INTERVAL PARAMETER INTELLIGENT TRUSS STRUCTURES

作　　者：林立广[1] 陈建军[1] 马娟[1] 张耀强[1] 

机构地区：[1]西安电子科技大学机电工程学院,西安710071

出　　处：《工程力学》2008年第12期189-193,共5页Engineering Mechanics

基　　金：国家863高技术研究发展计划项目(2006AA04Z402)

摘　　要：研究了具有区间参数压电智能桁架结构的动力特性分析问题,在压电主动杆和被动杆的物理参数和几何尺寸同时为区间变量时,利用区间因子法建立了结构的刚度矩阵和质量矩阵;从结构振动的Rayleigh商表达式出发,利用区间运算推导出结构特征值不确定变量的计算表达式。通过算例分析了不确定性智能桁架结构参数的区间分散性对其动力特性的影响,并获得了一些有意义的结论。The dynamic characteristic analysis of interval the interval variation of physical parameters of structural intelligent truss structures is presented. Considering materials, geometric dimensions of active bars and passive bars simultaneously, the structural stiffness matrix and mass matrix are constructed using interval factor method. From the Rayleigh quotient of structural vibration, the computation expression in terms of interval variables of structural characteristic is obtained on the basis of interval operation principles. The influence of structural parameters of interval intelligent truss on structural dynamic characteristics is inspected by an engineering example and some significant conclusions are drawn.

关 键 词：区间智能桁架结构 区间变量 区间运算 区间因子 自振特性 

分 类 号：O324[理学—一般力学与力学基础]