基于流固耦合的航空导叶作动筒振动特性分析  

Vibration characteristics analysis of aero-guide vane actuating cylinder based on fluid-structure coupling

作　　者：曹洋 王泽坤 刘鹏举 赵振 孔祥龙 满春雷 姚静[2] CAO Yang;WANG Zekun;LIU Pengju;ZHAO Zhen;KONG Xianglong;MAN Chunlei;YAO Jing(AECC Changchun Control Technology Co.Ltd.,Changchun,Jilin 130102,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;Hebei Innovation Center for Equipment Lightweight Design and Manufacturing,Qinhuangdao,Hebei 066004,China;Air Force Armament Department Military Representative Office in Changchun,Changchun,Jilin 130102,China)

机构地区：[1]中国航发长春控制科技有限公司,吉林长春130102 [2]燕山大学机械工程学院,河北秦皇岛066004 [3]燕山大学河北省轻质结构装备设计与工艺工程技术创新中心,河北秦皇岛066004 [4]空装驻长春地区军事代表室,吉林长春130102

出　　处：《燕山大学学报》2023年第4期289-297,共9页Journal of Yanshan University

基　　金：国家科技重大专项资助项目(2017-V-0015-0067);中央引导地方科技发展资金资助项目(226Z1901G)。

摘　　要：针对航空发动机高压压气机导叶作动筒在剧烈振动工作环境中的易损问题,确定导叶作动筒在振动过程中的固有频率与相关振型,获取关键结构件在标准功率谱下的动态响应,通过有限元法建立了考虑流固耦合的非线性模态分析仿真模型。通过单一变量法利用仿真模型研究接触刚度、活塞位于不同行程位置对相关固有频率与振型的影响机制,发现关键接触位置的接触刚度因子取0.8能保证仿真准确度并满足接触刚度,工作过程中活塞在行程上的位置发生变化,对第二、三阶的固有频率影响较大。完成共振检查试验,实测固有频率与仿真结果对应良好,验证了有限元分析模型的准确性。基于模态结果,根据航空标准建立随机振动仿真模型,得到关键结构件在3σ下的应力及变形响应,为导叶作动筒结构优化设计提供依据。Aiming at the vulnerability of guide vane actuating cylinder of a high-pressure compressor in an aero-engine under severe vibration working environment in order to determine the natural frequency and related modal shapes of guide vane actuating cylinder and obtain the dynamic response of key structural components under the standard power spectrum a nonlinear modal analysis simulation model considering fluid-structure coupling was established by finite element method.The influence mechanism of contact stiffness and piston location at different stroke positions on related natural frequencies and modal shapes was studied by using simulation model with single variable method.The results show that the contact stiffness factor of key contact positions is 0.8 which can ensure the simulation accuracy and satisfy the contact stiffness.The piston′s position on the stroke changes which has a great influence on the second and third order natural frequency during the working process.The resonance inspection test was completed and the measured natural frequencies corresponded well with the simulation results which verified the accuracy of the finite element analysis model.Based on the modal results a random vibration simulation model was established according to aviation standards.The stress and deformation responses of key structural components under 3σwere obtained which provided a basis for structural optimization design of guide vane actuating cylinder.

关 键 词：导叶作动筒 流固耦合 接触刚度 非线性模态 共振检查试验 随机振动 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]