典型宽体民用飞机发动机吊挂振动特性分析  

Vibration Characteristics Analysis of the Engine Pylon of Typical Wide-Body Civil Aircraft

作　　者：孙斌[1] 牟清源[1] 杨盛德 SUN Bin;MU Qing-yuan;YANG Sheng-de(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《计算机仿真》2020年第9期36-40,共5页Computer Simulation

基　　金：中央高校基本科研业务费中国民航大学专项资助项目(3122016D013)。

摘　　要：针对典型宽体民用飞机A330的Trent 700三转子涡扇发动机吊挂,采用ANSYS Workbench软件建立了吊挂有限元数值模型,结合工程实际中该发动机在慢车、起飞以及巡航阶段的特征频率进行吊挂部段的振动模态分析。根据计算获取的前六阶吊挂模态振型图,分析最大位移出现的位置,在此基础上研究了吊挂部段模型振动特性优化设计方法。通过对吊挂结构局部构型及安装点选材进行优化设计,借助数值分析验证了模型优化的合理性。对该优化模型开展谐响应分析,获得了不同外部激励下吊挂最大位移响应面的幅值变化规律。所提方法可为宽体民用飞机发动机吊挂减振设计的合理性验证提供重要参考。Aiming at the pylon of Trent 700 three-rotor turbofan engine of typical wide-body civil aircraft A330,the finite element analysis model of pylon was established by using ANSYS Workbench,and combing with engineering practice,the vibration modal analysis of pylon section was carried out according to the characteristic frequencies of the engine in the idling,take-off and cruise phases.According to the first six-order modal shapes of pylon,the position of maximum displacement was analyzed,based on which the optimal design methods of pylon section model vibration characteristics were studied.By optimizing the local configuration of pylon structure and material selection of fitting points,the rationality of the optimization model was verified through numerical analysis.The harmonic response analy⁃sis of the optimization model was made,and the amplitude variation law of the maximum displacement response sur⁃face of pylon under different external excitations was obtained.The research method in this paper can provide impor⁃tant reference for the rationality verification of engine pylon vibration reduction design of wide-body civil aircraft.

关 键 词：宽体民用飞机 吊挂 振动特性 谐响应分析 优化设计 

分 类 号：V228.4[航空宇航科学与技术—飞行器设计]