平板网架结构的静动力特性分析

以正放四角锥双层平板网架为例，利用大型通用有限元分析软件ANSYS进行建模、加载、前处理及后处理，并对其进行了静动力特性分析以及模态分析，得到对网架变形和内力有重要贡献的振动模态频率和振型，确定了网架在地震波作用下关键节点的时程响应曲线，所得结果对网架结构的地震效应分析具有一定现实意义，其结论可供同类工程借鉴。

STATIC AND DYNAMIC CHARACTERISTICS ANALYSIS OF THE FLAT GRID STRUCTURE

This paper takes double layer flat orthogonal square pyramid grids for example, and using finite element analysis software ANSYS for modeling. The static analysis and modal analysis were conducted to obtain the mode of vibration and the vibration modal frequency which has an important contribution to the grid deformation and internal force. The time history response of the key nodes when the flat lattice truss is under the action of seismic waves was determined, which has certain realistic meanings to the seismic effect analysis of grid structure, its conclusions also can be taken as the practical reference for similar projects.