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为提高多学科设计优化的寻优效率,以离心式压气机为对象,开展了耦合松弛多学科设计优化方法的研究。针对松散耦合方法建立的离心式压气机的流-热-固耦合分析模型,为了避免反复迭代导致的分析、优化时间过长,构建了分层次的离心式压气机耦合松弛优化设计系统。在气动优化中采用全局寻优算法探索系统最优气动设计方案;在耦合优化阶段,综合考虑学科间耦合及相互作用,在气动优化的基础上局部寻优校验气动优化结果并得到最终设计方案。这种不同复杂层次模型的优化设计有效缩减了系统优化设计周期。
In order to improve the optimization efficiency of multidisciplinary design optimization, a centrifugal multi-disciplinary design optimization method is studied. In order to avoid the analysis and optimization time caused by iterative iteration, a centrifugal-compressor coupled relaxation optimization design system with multi-level centrifugal compressor is constructed for the centrifugal compressor established by loose coupling method. In the aerodynamic optimization, the global optimization algorithm is used to explore the optimal aerodynamic design scheme. In the coupling optimization stage, considering the interdisciplinary coupling and interaction, the aerodynamic optimization results are optimized locally and the final design scheme is obtained . The optimization design of this different complex level model effectively reduces the system optimization design cycle.