Frequency-domain analysis of fluid-structure interaction in aircraft hydraulic pipeline systems: numerical and experimental studies  

作　　者：Yang DENG Zongxia JIAO Yuanzhi XU 

机构地区：[1]School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,China [2]Research Institute for Frontier Science,Beihang University,Beijing 100191,China [3]Key Laboratory of Advanced Airborne Systems,Beihang University,Beijing 100191,China [4]Ningbo Institute of Technology,Beihang University,Ningbo 315800,China [5]Tianmushan Laboratory,Hangzhou 310023,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2024年第8期605-617,共13页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Natural Science Foundation of China(Nos.51975025 and 51890822);the Young Elite Scientists Sponsorship Program by China Association for Science and Technology(No.2016QNRC001);the National Key Research and Development Program of China(No.2019YFB2004500)。

摘　　要：The fluid-structure interaction(FSI)in aircraft hydraulic pipeline systems is of great concern because of the damage it causes.To accurately predict the vibration characteristic of long hydraulic pipelines with curved segments,we studied the frequency-domain modeling and solution method for FSI in these pipeline systems.Fourteen partial differential equations(PDEs)are utilized to model the pipeline FSI,considering both frequency-dependent friction and bending-flexibility modification.To address the numerical instability encountered by the traditional transfer matrix method(TMM)in solving relatively complex pipelines,an improved TMM is proposed for solving the PDEs in the frequency domain,based on the matrix-stacking strategy and matrix representation of boundary conditions.The proposed FSI model and improved solution method are validated by numerical cases and experiments.An experimental rig of a practical hydraulic system,consisting of an aircraft engine-driven pump,a Z-shaped aero-hydraulic pipeline,and a throttle valve,was constructed for testing.The magnitude ratio of acceleration to pressure is introduced to evaluate the theoretical and experimental results,which indicate that the proposed model and solution method are effective in practical applications.The methodology presented in this paper can be used as an efficient approach for the vibrational design of aircraft hydraulic pipeline systems.

关 键 词：Fluid-structure interaction(FSI) Frequency-domain analysis Aircraft hydraulic pipeline Pipeline vibration Transfer matrix method(TMM) 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程]