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建立了包含高压涡轮(HPT)机匣基本结构在内的轴对称参数化模型,基于热固耦合变形和结构参数灵敏度分析结果,选择了灵敏度高的12个关键结构参数作为优化设计变量,采用第2代非劣排序遗传算法(NSGA-Ⅱ),开展了以机匣等效质量和挂钩处径向平均位移为目标函数的多目标优化。优化结果表明:机匣加强肋结构朝着有利换热的方向发展,其他结构朝着机匣质量减轻的方向发展;优化后模型质量及径向位移量均有所减小。
The axisymmetric parametric model including the basic structure of high pressure turbine (HPT) receiver was established. Based on the results of thermomechanical coupling deformation and structural parameter sensitivity analysis, 12 key structural parameters with high sensitivity were selected as optimization design variables. The second generation non-inferior rank genetic algorithm (NSGA-Ⅱ) is developed for multi-objective optimization with the equivalent mass of the receiver and the radial average displacement at the hook as the objective function. The optimization results show that the structure of the receiver rib enhances toward the direction of favorable heat transfer, while the other structures develop towards the reduction of the receiver mass. The optimized model quality and the radial displacement decrease.