压气机超速制造过程的数值仿真研究

Numerical simulation on manufacturing process of overspeed compressor

为配合压气机叶轮超速制造工艺的施行,根据我国现行增压器压气机叶轮的设计数据及使用要求,采用由参变量变分原理导出的有限元参数二次规划法对某增压器压气机进行了加载、卸载再加载的弹塑性变形全过程的数值模拟,针对不同的超速转速进行了大量计算,研究压气机叶轮在不同超速转速下,超速预过载处理后在工作状态下压气机叶轮应力、位移的大小及相应分布规律。结果表明随着超速转速的增加,超速预过载处理后的叶轮残余最大应力和最大位移值增加。超速转速大于33000r/min时,最大轴向、径向位移随超速转速的增大而迅速增大。

In order to facilitate the execution of manufacturing process for overspeed impeller of a compressor,a numerical simulation on elastic-plastic deforming process from load,unload and reload of the booster is carried out by adopting FE Parametric Quadratic Programming（PQP）method derived from the Parametric Variational Principle（PVP）according to national design data and application requirement for impeller of compressor of the booster.A large number of calculation is carried out specific to different overspeed velocity and the stress,displacement and distributing law of the impeller with different overspeed velocity is studied under working status after pre-overload of overspeed being processed,which result demonstrates that the maximum residual stress and residual displacement of impeller shall increase with the increase of the overspeeds.As the overspeed is more than 33000r/min,the maximum axial and radial displacement of impeller increase rapidly.