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建立了一个涡轮榫头/榫槽的一体化结构设计优化系统.在此优化系统中,采用榫头/榫槽间隙配合的参数化建模方法.利用ANSYS对结构进行非线性接触分析,基于二次开发实现了目标函数以及其他相关结果的自动提取.采用多岛遗传及二次序列规划算法对优化空间进行寻优,在满足几何约束和强度约束的条件下,优化降低了最大拉应力值和当量应力值.实例分析结果表明,一体化优化设计使涡轮叶片、叶盘性能得到明显的提高,所建系统稳定、高效,具有应用于工程实践的可行性和可靠性.
An integrated structural design optimization system of turbine tenon / mortise is established.In this optimization system, a parametric modeling method of tenon / mortise gap coordination is adopted.Nonlinear contact analysis of the structure is carried out by ANSYS, based on the secondary development The objective function and other related results are automatically extracted.Using multi-island genetic algorithm and quadratic sequence programming algorithm to optimize the optimal space, under the condition of satisfying the geometric constraint and the strength constraint, the optimal tensile stress and equivalent stress are reduced The results of example analysis show that the integrated optimization design can obviously improve the performance of turbine blade and impeller, the system is stable and efficient, and has the feasibility and reliability of engineering practice.