大跨张弦梁结构动力特性分析

摘要

The 3-D finite element model of a beam string structure with the ANSYS program was built,and then the dynamic characteristics of the structure were obtained. The results show that the modes of the beam string structure are very complicated,and the local modes appear in the first several modes,the vertical frequencies are small,and the vertical stiffness is weak. The outputs will be useful for the further investigation on the mechanical characteristics of this type structures.%基于 ANSYS 有限元分析程序，建立某张弦梁结构三维有限元模型，获得结构动力特性，结果表明：张弦梁结构模态复杂，局部模态在前几阶表现突出；竖向自振频率小、竖向刚度较弱，该结果为进一步研究类似结构的受力特性提供了参考。