电动振动台动圈的结构动态特性分析

摘要

In order to improve the performances of the electrodynamic shaker armature, the finite element model of the armature was established and the boundary conditions were defined. By means of computing the armature modes of different orders, its dynamic characteristics. With the aid of the modals analysis, the first axial modal of the armature were obtained, and the validity were analyzed, so that its first-order axial resonance frequency was obtained and verified by test. The result showed that the structure and material of the armature would decide the magnitude of that resonance frequency, and the larger the specific rigidity of the armature material. This could be done by adding reinforcing ribs to the armature.%为了提高电动振动台的工作性能,建立电动振动台动圈的有限元模型,确立其边界条件,通过计算动圈的各阶模态,分柝其动态特性,获得动圈的一阶轴向共振频率并进行实验验证.结果表明,动圈的结构及材料决定动圈一阶轴向共振频率的高低,动圈所选材料的比刚度越大越好;加强筋可以增强动圈的刚性.