Volume 36, Number 3, June 2018
|Page(s)||487 - 495|
|Published online||08 October 2018|
Frequency Response Analysis of Fluid-Structure Interaction Vibration in Aircraft Bending Hydraulic Pipe
Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004, China
2 Nanjing Engineering Institute of Aircraft System Jincheng AVIC, Nanjing 210000, China
3 Key Laboratory of Advanced Forging & Stamping Technology and Science, Ministry of Education of China(Yanshan University), Qinhuangdao 066004, China
For the aviation bending pipe, the fluid-structure interaction 14-equation model is established, and the Laplace transform is used to solve the problem in the frequency domain. For the pipeline with a single elbow, the influence of bending parameters on the frequency response of the pipeline in the frequency domain is analyzed by using the 14-equation. At the same time, for pipelines containing two elbows, we analyze the influence of bending parameters on the natural frequency of the pipeline in different spans. In the end, the accuracy of the simulation is verified by the modal knocking test. Through the above analysis, we reach the following conclusion:the bending angle of the pipeline is greatly influenced by inherent characteristics, the smaller the bending angle, the higher the pipeline’s inherent frequency domain. However, the effect of bending radius will cause the change in length. Usually, the increase of bending radius leads to pipe length increasing, resulting in its inherent frequency decreasing.
Key words: fluid transmission and control / frequency domain vibration response / fluid-structure interaction vibration / bending hydraulic pipeline / aircraft
关键字 : 流体传动与控制 / 频域振动响应 / 流固耦合振动 / 弯曲液压管路 / 国产大飞机
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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