文档介绍：振动与冲击筇31卷第S期 VIBRATION AND SHOCK 2012 基于模型的转子裂纹在线检测技术研究★狄远,张启迪,刘长利,周绍萍(华东理t大学机械与动力工程学院承压系统安全教育部重点实验室,.I-海200237) 摘要:研究转轴裂纹位置识别方法,采用有限单元泫建讧裂纹转了有限元模型,获得裂纹争元刚度矩阵,利用摹于模型的方法在时域.}:,分析比较J,两种识别方法对于裂纹位置识别的结果。本文对转了裂纹在线诊断技术有实际参考价值。关键词:转予裂纹:识别;基于模型;时域;频域中图分类号:0322;TK267 文献标识码:A Research onModel—based Identification Methods ofCracks inRotating Shafts DIYuan,ZmNG g-di,LIU Chang-li,zHoU Shao-ping (School ofMeehanical Engineering,Key Lab ofSafety Science ofPressurized system,Mmistw ChilIaUniversity of Science andTechnology,Slam曲ai 200237,China) Abstract:Two main identificationapproaches Wel'epresented forcracks cracked rotor system WaSestablishedby on the approach ofstrainenergy release rate,the stiffness matrixofthecrackelement WaS modelbased crack identificationmethods time domain and frequeney domain were deprived two methods we∞ utilized toidentify thelocation of acrack On were verified simulating conditions and uracy andconvenience oftwo approaches wel"eanalyzed pared with each Key words:rotor,crack,identification,model baSedmethod,timedomain,frequency domain 对jr转子裂纹的识别的研究在最近几十年得到了很大的发展。Semold和Weinert?提出了在转动机械中基jJ:振动测罩裂纹的位置。这个方法是使用时域识别算法:也就是EKF。设计了许多EKF来实现定位, 每一个EKF都被调整到不同的损伤假设:比如特定的裂纹位置。通过计算不|一假设的特性,裂纹可以定位和确定深度。lshida等【2j'p1对转动裂纹