基于正交实验的压气叶轮应力优化分析  

Optimization Analysis of Compressor Impeller Stress Based on Orthogonal Experiment

作　　者：柳晓鹏 LIU Xiao-peng(Chongqing Second Military Representative Office of Navy,Chongqing 402260,China)

机构地区：[1]海军驻重庆第二军事代表室,重庆402260

出　　处：《内燃机与配件》2020年第2期46-51,共6页Internal Combustion Engine & Parts

摘　　要：压气叶轮是压缩机的主要部件,工作状态下主要受离心力载荷的影响。叶轮通常被设计成某一特定形式,以减少轮毂的应力峰值。针对不同去重因素对压气叶轮强度影响,使用去重优化方法和正交试验设计,给出一组具有不同几何尺寸的高压比压气叶轮,并且使用MSC.PATRAN有限元计算软件对这些叶轮的强度性能进行了计算。结果表明叶轮轮背去重比不去重的强度要好,但去重的形状及位置对应力峰值的影响非常大,不恰当的去重将导致峰值应力恶化,根据正交试验的结果确定了最优方案。这些工作为叶轮的多学科优化设计提供了良好的基础。Impeller is one of the most important parts of compressor what’s mainly affected by centrifugal force at its working state. In order to reduce the peak stress of the impeller disk profile, impeller is usually designed to be a particular structure. According to the influence of different deweighting factors on the strength of compressed-air impeller, an optimized deweighting method and orthogonal experimental design are used to get a set of high pressure ratio compressor impellers with different geometric size. And the strength of these impellers has been calculated through the finite element software(MSC.PATRAN). The results show that the impellers have a lighter weight is better than the original. But the effect of the shape and the location on the peak stress is very large. If the shape or the location is inappropriate, the peak stress will deteriorate. According to the results of the orthogonal experiment, the optimal scheme is determined. All these conclusions can be the foundation of multidisciplinary optimization of impeller.

关 键 词：压气叶轮 离心力 优化 正交试验设计 MSC.PATRAN 

分 类 号：TH45[机械工程—机械制造及自动化]