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大型复杂结构都是由多个子结构组合而成的,其连接刚度会显著影响整体结构的动力学特性.本文已简单搭接板为例,采用有限元方法建立了连接刚度的体单元、加厚板单元、多点约束单元等有限元分析模型,获得了不同建模方式下,搭接板在外载荷作用下的静力学响应和无阻尼自由振动的动力学特性参数,对比分析了不同建模方式对结构动力学特性的影响。
Large and complex structures are composed of a combination of multiple sub-structures, the connection stiffness will significantly affect the dynamics of the overall structure.In this paper, a simple lapped plate as an example, using the finite element method to establish the connection stiffness of the body unit, thickening Plate element, multi-point restraint element and other finite element analysis models, the dynamic response of undamped free vibration and the static response of the lapped plate under external load are obtained under different modeling methods, and the different modeling methods Effect on structural dynamics.