Vibration transfer path analysis of aeroengine multi-support accessory system

被引：0
作者：
Zhu Q. [1 ]
Han Q. [1 ,2 ]
Wang W. [3 ]
Jiang Z. [3 ]
机构：
[1] School of Mechanical Engineering, Dalian University of Technology, Dalian
[2] School of Mechanical Engineering and Automation, Northeastern University, Shenyang
[3] College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2024年 / 45卷 / 04期
基金：
中国国家自然科学基金;
关键词：
accessory system; dynamic design; inverse matrix method; simulation TPA; transfer function; Transfer Path Analysis（TPA）;
D O I：
10.7527/S1000-6893.2023.28303
中图分类号：
学科分类号：
摘要：
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，after 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. © 2024 Chinese Society of Astronautics. All rights reserved.
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