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    某机载设备安装架轻量化设计与分析

    Lightweight Design and Analysis of an Installation Rack of Airborne Equipment

    • 摘要: 机载设备对质量有着极高的要求。文中以有限元分析方法为主要研究手段,开展了某机载电子设备安装架的拓扑优化和结构构型设计,对比分析了该安装架轻量化设计后的质量指标、模态频率及随机振动条件下的应力响应值。经拓扑优化后该安装架质量减轻了21.23%,基频降低了5.66%,安装孔处随机振动最大应力响应值增大了2%,但最大应力值仍低于对应材料的屈服极限,具备足够的强度裕度。分析结果证明了该轻量化设计方法的可行性。

       

      Abstract: Airborne equipment has extremely high weight requirement. The topology optimization and structural configuration design of an installation rack of airborne electronic equipment are carried out by finite element analysis method in this paper. The weight index, modal frequency and stress response values under random vibration conditions of the installation rack after the lightweight design are compared and analyzed. After topology optimization, the weight of the installation rack has reduced by 21.23%, the fundamental frequency has reduced by 5.66%, and the maximum stress response value of random vibration at the installation hole has increased by 2%. However, the maximum stress value is still lower than the yield limit of the corresponding material, which has sufficient strength margin. The analysis results have proven the feasibility of this lightweight design method.

       

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