基于坐标关联法的榫连接结构优化设计

为解决结构优化设计过程中由于几何尺寸干涉而导致的优化过程中断问题,提出并建立一种适于优化设计的结构建模方法——坐标关联法.将该方法应用于航空发动机榫连接结构的优化设计,整个优化过程顺畅,连续完成几何建模790次,未出现由于几何尺寸改变而发生的结构模型无法生成的问题.优化设计结果表明:优化前后的榫连接结构形状虽然变化不大,但最大应力点——榫槽喉部最大应力降幅达19.1%,应力水平降低明显,且结构造型符合工程要求. 

Optimization design of tenon connection structure based on coordinate correlation method

To solve the problem about the design optimization process interruption due to geometric dimensional interference in the process of structure optimization design, a method(coordinate correlation method) was established, making suitable for optimization design of structure modeling. This method was applied to aeroengine tenon connection structure optimization design; the process was smooth, and structural modeling of 790 times was completed without any problems due to geometric changes. The optimization design results show that the maximum stress on the groove throat area drops by 19.1% though the changes before and after optimization of tenon connection structure shape are not big. The stress levels are significantly lower, and the structure model meets the engineering requirements.