星箭分离减冲击环结构优化设计

In view of the process of satellite rocket separation, a structural model of shock isolation ring is established, and its working principle is analyzed. By using the time domain synthesis algorithm of the shock response spectrum, the frequency domain shock load is converted into time domain shock load, which is then used as the input load condition of the dynamic model in the structural optimization design. The structural optimization design model of the shock isolation ring is established with six structural parameters, namely, the number of the continuous layers, the number of single layer support blocks, the height of the continuous layers, the height of the support blocks, the inner and outer radius of the ring as design variables, the shock isolation effect, structural strength and stiffness as constraints, and the lightest mass as the goal. This is a hybrid optimization problem involving discrete and continuous design variables. In order to solve the hybrid optimization problem under cross platform, the surrogate model strategy and adaptive simulated annealing algorithm are used to solve the problem. The sensitivity calculation of structural performance to design variables is carried out at the optimal point, and the calculation results are analyzed and evaluated. The proposed design has certain guiding significance for the analysis and design of spacecraft structure under strong shock dynamics environment.