某机载雷达静压腔应力仿真与多目标优化

某机载雷达正常工作时，应力仿真结果显示其静压腔焊缝位置的最大应力为133.62 MPa，不满足强度要求，需要对其结构进行优化。综合比较构造拱形结构和局部加强这两种常见优化方案，选择在静压腔前后两面各增加一条加强筋。借助ANSYS WorkBench求解加强筋的最优宽度和厚度时，依据各位置强度要求之间的关系，建立一个直接描述优化效果的输出参数，用于定义优化模型，开展多目标优化。优化后，静压腔焊缝位置的最大应力为82.821 MPa，其余位置的最大应力为59.921 MPa，均满足强度要求。结构的不同位置通常具有不同的指标要求，文中据此建立输出参数进而求解优化模型的处理方法在此类问题中具有借鉴意义。

Stress Simulation and Multi-objective Optimization of Static Pressure Cavity in an Airborne Radar

The stress simulation results show that the maximum stress on the weld of static pressure cavity is 133.62 MPa when the airborne radar is working, which does not meet the strength requirement. Structure optimization for the static pressure cavity is needed. Building arch structure and local reinforce are two common structure optimization schemes. After comparing these two schemes, the scheme of adding a stiffener on each of the front and back sides of the static pressure cavity is adopted. When solving the optimal width and thickness of the stiffener with the aid of ANSYS Workbench, an output parameter directly describing the optimization effect is created according to the relationship between the strength requirements of different locations. And the parameter is used to define the model of the multipurpose optimization. After optimization, the maximum stress on the weld of static pressure cavity is 82.821 MPa and the maximum stress in other locations is 59.921 MPa, both of which meet the strength requirement. Different locations usually have different strength requirements, according to which a new output parameter is created to solve the optimization model. This method has reference value for similar problems.