### 基于ANSYS Workbench的压接修理民机液压管路振动特性分析

1. 中国民航大学 航空工程学院, 天津 300300
• 收稿日期:2018-12-03 修回日期:2019-03-20 出版日期:2019-09-15 发布日期:2019-06-14
• 通讯作者: 于灵杰 E-mail:15510928918@163.com
• 基金资助:
中国民航局重大专项（MHRD20160105）；民机专项（MJ-2016-Y-73）

### Vibration characteristics analysis of pressurized repair hydraulic pipe of civil aircraft based on ANSYS Workbench

JIA Baohui, YU Lingjie, LU Xiang

1. Faculty of Aerospace Engineering, Civil Aviation University of China, Tianjin 300300, China
• Received:2018-12-03 Revised:2019-03-20 Online:2019-09-15 Published:2019-06-14
• Supported by:
Major Project of China Civil Aviation Administration (MHRD20160105); Special Project of Civil Aircraft (MJ-2016-Y-73)

Abstract: This paper explores the optimum repairing dimension of hydraulic straight pipes of civil aircraft with diameter of 1/4 in vibration environment. Firstly, the finite element model for hydraulic straight pipe and fluid of civil aircraft is established, and the first six natural frequencies are obtained by the finite element simulation analysis in ANSYS Workbench. Then the first six natural frequencies of the hydraulic straight pipe of civil aircraft are obtained by sweeping frequency vibration test with three comprehensive vibration test benches.The comparison of the average of the test results with the simulation results shows that the error is small with good curve fitting, which verifies the rationality of the simulation analysis. Finally, the stress analysis of the pressure-joint repair pipeline is carried out, and the natural frequency, the maximum stress, and the maximum displacement response along the Y and Z axes of the pressure-joint repair civil aircraft hydraulic straight pipe are analyzed with the tolerance of the pressure area and the length of the pressure-joint as variables. The results show that when the tolerance of pressing zone is 4 mm and the length of pressing joint is 39 mm, the natural frequency of the pipeline is relatively large and the response of stress and displacement is relatively small. At this time, the maximum stress and displacement response are concentrated at the joint, which is consistent with the results of stress analysis.