薄壁旋转叶片热屈曲失稳与损伤应用研究  

Application of thermal buckling instability and damage of thin-walled rotating blades

作　　者：庄奇凯 门秀花[1] 宋宝强 张昊 杨锋 ZHUANG Qikai;MEN Xiuhua;SONG Baoqiang;ZHANG Hao;YANG Feng(Department of Mechanical Engineering,University of Jinan,Jinan 250022,CHN;Shandong Zibo Daya Metal Tetal Technology Co.,Ltd.,Zibo 255318,CHN)

机构地区：[1]济南大学机械工程学院,山东济南250022 [2]山东淄博大亚金属科技股份有限公司,山东淄博255318

出　　处：《制造技术与机床》2024年第12期79-84,共6页Manufacturing Technology & Machine Tool

基　　金：山东省自然科学基金面上项目(ZR2021ME179)。

摘　　要：作为发动机中最重要的部件之一,旋转叶片的结构特性和工作状态直接影响到航空发动机的正常运行。以应用于航空发动机中高速旋转叶片为研究对象,对其屈曲失稳响应进行研究。建立旋转叶片结构热屈曲分析模型,对比揭示温度场下约束叶片的线性与非线性热屈曲响应的失稳特性。通过对比线性/非线性热屈曲响应,发现了非线性屈曲失稳特性更接近真实损伤工况,分析出屈曲应力最大的部位位于叶根并与试验对比一致,由此获得了叶片的临界载荷及其失稳条件,这对降低热-结构耦合振动对叶片的损伤具有重要的意义。As one of the most important components in the engine,the structural characteristics and working condition of the rotary blade directly affect the normal operation of the aero-engine.The high-speed rotary blade applied in the aero-engine is taken as the research object,and its buckling instability response is investigated.An analytical model of thermal buckling of rotary blade structure is established to compare and reveal the instability characteristics of linear and nonlinear thermal buckling response of the constrained blade under the temperature field.Comparing the linear/nonlinear thermal buckling response,the nonlinear buckling instability characteristics are found to be closer to the real damage conditions,and the part with the largest buckling stress is analyzed to be located at the root of the blade and is consistent with the experimental comparison,thus obtaining the critical load and its instability conditions of the blade,which is of great significance to reduce the damage of the blade caused by the thermal-structural coupling vibration.

关 键 词：旋转叶片 有限元分析 热屈曲 失稳损伤 

分 类 号：TH114[机械工程—机械设计及理论] V232.4[航空宇航科学与技术—航空宇航推进理论与工程]