不同截面形式钢桁架结构动力特性分析

摘要

为了研究不同截面形式下钢桁架结构的动力特性差异，根据重力相等原则，运用有限元计算软件 ANSYS 对空心矩形、空心圆形以及工字形三种不同截面形式的钢桁架结构建立了三维有限元计算模型，并通过模态分析得到了结构的动力特性参数，分析结果表明，相同模态阶数下，工字形截面的钢桁架结构频率较其他截面高。%In order to under different section forms of steel truss structure dynamic characteristic difference using gravity equal principle,using finite element software ANSYS of hollow rectangular and circular hollow and I-beam shaped three different section forms of steel truss structure three-dimensional finite element calculation model is established,and its modal analysis is performed to get the dynamic characteristic parameters of the structure. The analysis results show that the frequency of the steel truss with the same mode is higher than that of other sections.