涡轮增压器涡轮叶轮有意失谐强迫振动特性研究  

Characteristics of Forced Oscillation for Turbocharger Turbine Impeller under Intentional Mistuning

作　　者：王智慧[1,2] 马朝臣[1] 黄智[1] WANG Zhihui;MA Chaochen;HUANG Zhi(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;School of Mechanical,Jinzhong University,Jinzhong 030619,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]晋中学院机械学院,山西晋中030619

出　　处：《车用发动机》2020年第1期55-61,共7页Vehicle Engine

基　　金：晋中学院“1331工程”创客团队建设计划资助(jzxycktd2017001)

摘　　要：通常希望增压器涡轮叶轮的每个叶片都制造得完全相同,形成严格的循环对称结构,但由于制造误差和工作磨损等因素会造成涡轮叶轮存在失谐。为了在设计中降低叶轮对随机失谐的敏感性,以某型号涡轮增压器涡轮叶轮为研究对象,使用CMM缩减模型和加速Monte Carlo模拟,对使用3种有意失谐方案设计的涡轮随机失谐的敏感性进行了分析。研究表明,方案Ⅰ的叶轮强迫振动敏感性曲线仍然具有峰值特征,但振动响应幅值得到一定程度的降低。方案Ⅱ的叶轮强迫振动敏感性曲线的响应峰值不再明显,最大响应幅值放大系数相比谐调叶轮由1.86降到1.58。方案Ⅲ的叶轮强迫振动敏感性曲线上的响应峰值有较大下降,最大响应幅值放大系数为1.49,微小失谐时响应值较低,对失谐不敏感。All turbine rotor blades are expected to be manufactured uniformly so as to form a strict circular symmetric structure,but the mistuning of turbine impeller always exists due to some factors such as the machining tolerance and running wear.In order to reduce the sensitivity of impeller to random mistuning in design,the random mistuning sensitivities of impeller designed according to three intentional mistuning patterns were analyzed based on the CMM reduced-order model and accelerated Monte Carlo simulation.The results show that the forced response sensitivity curve of pattern Ⅰ still exhibits a peak characteristic but with a decreased amplitude.The peak response amplitude of pattern Ⅱ is no longer obvious and the amplification factor of its maximal amplitude decreases from 1.86 to 1.58 when compared with the tuned turbine.The designed pattern Ⅲ results in a dramatic decrease of response amplitude and the amplification factor is only 1.49.The response amplitude of pattern Ⅲ is small for slight mistuning and thus not susceptible to mistuning.

关 键 词：涡轮增压器 涡轮 有意失谐 强迫振动 响应敏感性 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]