变刚度复合材料夹芯板设计及模态分析

为提高卫星主承力结构刚度,本文基于定曲率圆弧曲线及平移法对变刚度夹芯板蒙皮进行设计,利用ABAQUS二次开发方法及响应面法对不同起始角/终止角组合的夹芯板进行等效建模、模态分析和模态基频优化。数值计算结果表明,变刚度设计的夹芯板由于曲线铺放提升夹芯板模态基频,蜂窝板的模态基频随起始角先增大后减小,随终止角增大而增大,基频最大提升12.33%,可以减小蜂窝基本承力结构与设备的动态耦合效应。

Design and modal analysis of sandwich plates with variable stiffness

In order to improve the stiffness of satellite main load-bearing structure, the variable stiffness sandwich panel skin is designed based on the constant curvature arc curve and translation method. The equivalent modeling, modal analysis and modal fundamental frequency optimization of sandwich panel with different initial / ending angle combinations are carried out by using ABAQUS secondary development method and response surface method. The numerical results show that the modal fundamental frequency of the sandwich panel with variable stiffness design increases first and then decreases with the increase of the initial angle and then decreases, and increases with the increase of the ending angle. The maximum lifting percentage of the fundamental frequency is 12.33%, which can reduce the dynamic coupling effect between the honeycomb basic bearing structure and the equipment.