优良的结构形式可以减轻机载电子设备在飞机飞行过程中受到的振动,有效保护设备内部精密的电子元器件,从而保证机载设备长期稳定工作。强度高、质量轻的电子单元机箱正在成为机载电子设备设计的趋势,组合式机箱以成本低、变形小、尺寸稳定性好、设计空间丰富等诸多特征在机载产品中应用广泛。文中以某机载组合式机箱为研究对象,运用有限元仿真方法,对单元组合式机箱关键承力零件进行拓扑减重设计及尺寸优化设计。根据最终优化结果,进行整体组合式机箱动力学强度校核。研究结果证明:优化后的组合式机箱结构既减轻了质量,又满足结构设计强度要求。

The excellent structural form can reduce the mechanical vibration that the airborne equipment withstands during working and protect the precision electronic components in the structure effectively so to keep longterm stable work for airborne equipment. High-strength and light-weight equipment mounting racks are becoming an trend for the design of airborne sub-equipment. The modular chassis is widely used in airborne products with many features such as low cost, small deformation, good dimensional stability, rich design space and so on. With finite element simulation, an airborne modular case is taken as the research object to design weight and size by taking topological optimization method. The research result prove that the optimized combined chassis structure not only reduces the weight, but also meets the structural desigh strength requirements.

TN959.73