大推力捆绑运载火箭传力路径优化设计

以新一代大推力捆绑火箭捆绑装置设计为研究背景,开展助推器传力路径优化设计研究。在方案初步优选的基础上,基于i SIGHT建立大推力捆绑火箭传力路径优化平台,针对现有优化方法的不足,选用多岛遗传(Multi-Island Genetic Algorithm,MIGA)+二次规划(Sequential Quadratic Programming,SQP)组合优化算法进行传力路径优化设计,从而大幅优化了捆绑联接结构载荷。该方法可为大推力捆绑运载火箭方案设计提供参考和依据。

An Optimization Design for the Force Transmission Path on the High-thrust Strap-on Launch Vehicle

On the background of the engineering problem that the strap-on linkage equipment of the launch vehicles on active duty can't satisfy the load design requirements of the new generation high-thrust strap-on launch vehicle and thus the research and development of new linkage equipment technology is needed. This essay studies the force transmission path optimization and designs two hyper-static categories of force transmission path schemes. Through the finite element analysis of the initial configuration of the high-thrust launch vehicle, a optimal scheme of the force transmission path is selected. Design the combinatorial optimization strategy of the force transmission path of high-thrust strap-on launch vehicle based on the iSIGHT platform: Firstly, use multi-island genetic algorithm to explore the region where the globally optimal solution lies and then approach the exact optimal solution by sequential quadratic programming. The computational results of the structure force and natural frequency suggest the new scheme of force transmission path can substantially optimize the load of strap-on linkage equipment and also satisfy the requirements of the attitude control design.