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针对以往的多学科优化设计(MDO)中未能考虑高精度的耦合分析,开展了涉及耦合分析的多学科优化方法研究。以涡轮叶片为研究对象,兼顾优化效率和精度,提出了涉及耦合的涡轮叶片多学科优化策略。该策略以协同优化(CO)策略作为框架,将可变复杂度建模方法(VCM)和3种精度(高、中、低)模型嵌入其中。其中,通过两点式标度函数和周期更新方法提高可变复杂度建模方法管理3种精度模型的能力。3种精度模型包括涡轮叶片的流固耦合分析、单学科分析和响应面近似方程。最终解决了涡轮叶片多学科优化设计精度和效率的难题,得到可行的最优化结果。
Aiming at the failure to consider high-precision coupling analysis in MDO, a multidisciplinary optimization approach involving coupling analysis has been developed. Taking the turbine blade as the research object, taking into account the optimization efficiency and accuracy, a multi-disciplinary optimization strategy of the turbine blade with coupling is proposed. The strategy uses a collaborative optimization (CO) strategy as a framework to embed a variable complexity modeling approach (VCM) and three precision (high, medium and low) models. Among them, the ability of variable complexity modeling method to manage three kinds of accuracy models is improved by two-point scaling function and periodic updating method. The three accuracy models include the fluid-structure interaction analysis of turbine blades, the single-discipline analysis and the response surface approximation equation. Finally solve the multi-disciplinary turbine blade design optimization and efficiency of the problem, to be feasible to optimize the results.