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鼠笼式弹性支座是飞机发动机转子系统内的关键支撑构件,其设计结果直接影响到转子-支承系统的静动特性.开展了鼠笼式弹性支座的槽孔形状优化设计研究,通过阐明三维曲面上孔形优化设计的难点以及现存形状优化设计方法的不足,提出了基于曲线-曲面方程的几何设计变量参数化映射定义的新方法.根据形状优化设计问题设计变量少、约束多的特点,采用遗传算法建立了满足弹性支座减重与强度刚度设计要求的自动优化设计流程.以两个鼠笼式弹性支座槽孔形状优化设计为例,实现了单对称形、双对称形和椭圆形周期分布槽孔的优化设计,发现槽孔优化形状均具有两头窄、中间宽的纺锤形特点,说明纺锤形槽孔是鼠笼式弹性支座的一种新型有效的槽孔设计形状.
The squirrel-cage elastic bearing is the key supporting component in the rotor system of aircraft engine, the design result of which directly affects the static and dynamic characteristics of the rotor-bearing system.The optimization design of the slot shape of the squirrel-cage elastic bearing is carried out, Aiming at the difficulty of hole shape optimization design on three-dimensional surface and the shortage of existing shape optimization design methods, a new method of parametric mapping definition of geometric design variables based on curve-surface equation is proposed. According to the shape optimization design problem, , An automatic optimization design flow was established to meet the design requirements of weight loss and strength stiffness of elastic bearings by using genetic algorithm.Taking the shape optimization design of two squirrel cage elastic supports as an example, single symmetrical shape, double symmetrical shape and The optimal design of slots with elliptical periodic distributions shows that the optimal shape of the slots has a two-headed narrow middle spindle shape, which indicates that the spindle-shaped slot is a new and effective slot design shape of the squirrel-cage elastic support.