尾流激振情况下叶片振动应力预估方法  

Method to Predict the Blade Vibration Stress Induced by Wake Influence

作　　者：邱睿[1] 郝艳华[1] 

机构地区：[1]华侨大学机电及自动化学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2009年第5期492-495,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省科技重大专项项目(2006HZ02040038);福建省自然科学基金资助项目(E0510020);华侨大学高层次人才科研启动项目(03BS204)

摘　　要：针对叶片强迫响应问题,提出采用谐响应分析方法,将计算得到的叶片S1流面压力场引入动力学分析中.由进口导叶尾迹速度亏损计算出激振因子,把S1流面压力场转化为谐响应分析中的载荷压力场,初步建立S1流面压力场与叶片动应力的数值关系,以及在进口导叶尾流激振情况下叶片振动应力的预估方法.利用模态叠加法,研究进口导流叶片尾流亏损产生的不均匀来流对第一级转子叶片振动的影响.The calculated S1 stream-face field of the blades used by harmonic response analysis is introduced into dynamic analysis for the forcing response problem of the blades. The exciting factor is calculated from the inlet guide vane wake velocity deficit, and the S1 stream-face pressure field is converted into load pressure field in harmonic response analysis so that the numerical relations between the S1 stream-face pressure field and the dynamic stress of the blades could be established and prediction method for the excitation stress of the blades under the condition of the inlet guide vane wake influence could be obtained. Mode superposition method can be used to investigate the influence of the unsteady floe induced by inlet guide vane wake deficit on the vibration of the first-stage rotor blades.

关 键 词：叶片 激振 尾迹 S1流面 模态叠加法 振动应力 

分 类 号：V215.34[航空宇航科学与技术—航空宇航推进理论与工程]