摘要
附件系统是航空发动机的重要组成部分,发动机过度振动常常会造成附件结构的局部破坏。针对某航空发动机具有多个安装结构支撑的滑油箱系统,开展不同飞行状态(空中慢车、巡航以及最大工作转速状态)下滑油箱振动传递路径分析(TPA)。首先,基于TPA基本原理,建立了多支撑滑油箱系统TPA有限元模型,并验证了模型的有效性。然后,基于某发动机实测滑油箱振动载荷谱,仿真分析了滑油箱多个目标点的振动响应。进一步地,基于仿真TPA方法,比较研究了不同飞行状态下安装结构对滑油箱振动响应的贡献量大小。结果表明,在N1、N2及2N1处,滑油箱振动响应相对较大;在空中慢车和巡航状态,安装结构不同振动传递方向对目标点振动响应贡献量排序为Y>X>Z;在最大工作转速状态,不同安装结构Y向和X向振动传递方向对目标点振动响应贡献量相对较大。最后,通过降低主要传递路径的传递函数和工况载荷,滑油箱振动响应分别下降了1.5、2.8 dB。本文所使用的TPA分析方法可用于指导航空发动机复杂多支撑外部附件系统的动力学设计。
The accessory system is an important component in aero-engines,and excessive engine vibration often causes local damage to the accessory structure.Aiming at an aero-engine lubricating oil tank system supported by multiple mounting pedestals,we perform the vibration Transfer Path Analysis(TPA)of the oil tank under different flight conditions(idle,cruise,and maximum operating speed states).Firstly,based on the basic principle of the TPA,the TPA Finite Element(FE)model of the lubricating oil tank system is established,and the TPA model validity is verified.Then,based on the measured vibration load spectrum of an aero-engine lubricating oil tank,the vibration responses of multiple target points of the oil tank are simulated and analyzed.Furthermore,based on the simulation TPA method,the contribution of the mounting pedestals to vibration response of the oil tank under different flight conditions is com⁃pared and discussed.The results show that the vibration response of the oil tank is relatively large at N1,N2 and 2N1.In the idle and cruise states,the contribution of different vibration transfer directions of the mounting pedestals to the target point vibration response is Y>X>Z.At the maximum operation speed,the Y and X vibration transfer directions of different mounting pedestals have relatively large contributions to the vibration response of the target point.Finally,af⁃ter reducing the transfer function and operated load of the main transfer path,the vibration response of the oil tank is reduced by 1.5 dB and 2.8 dB,respectively.The TPA analysis method used in this paper can provide guide for the dynamic design of aeroengine complex external accessory systems with multiple supports.
作者
朱清玉
韩清凯
王维民
江志农
ZHU Qingyu;HAN Qingkai;WANG Weimin;JIANG Zhinong(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China;School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2024年第4期51-66,共16页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(12072069)。
关键词
附件系统
传递路径分析
仿真TPA
传递函数
逆矩阵法
动力学设计
accessory system
Transfer Path Analysis(TPA)
simulation TPA
transfer function
inverse matrix method
dynamic design
