【摘要】 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.更多还原

【Abstract】 An integrated optimization design system for turbine tenon/mortise has been set up.In this system,contact clearance was used for parametric modeling of turbine tenon/mortise.Nonlinear contact method was used for analysis of finite element by the strong commercial software of ANSYS which could get objective and other stresses by secondary development of language.Meanwhile,multi-island genetic algorithm and sequential quadratic programming were used for optimization in specified space.As a result,the maximal first principal stress and von mises stress decreased obviously under the condition of meeting the geometry and strength requirements.The system exhibits higher stability,feasibility and efficiency for engineering applications.更多还原