Analysis of the discrete model of the aerial pipeline block and its influence on the vibration characteristics of the pipe system
WANG Hongxin1, QUAN Lingxiao2
(1.Shanghai Aircraft Design and Research Institute, Shanghai 201210, China; 2. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)
 

Abstract: Aiming at the increasingly serious problem of the resonance instability in the development trend of high speed and high pressure of the aviation hydraulic pipeline, studies on the inherent characteristics of pipeline vibration caused by the change of the support parameters of the aviation hydraulic pipeline were carried out.The constraint function of the supporting element which was common in the multi support aviation hydraulic pipe system was discreted. The discrete model of pipeline support was established, and further the finite element model of the hydraulic pipe line was founded in the ANSYS software platform. The number of support, support position, support stiffness and preload were changed, to analyze the impact on the vibration characteristics of the pipe system with the parameters changed, the effect of support parameters on the vibration characteristics of the pipe system. In addition, the effect of the support parameters on the vibration characteristics of the pipe system was obtained. The research results show that the influence of support parameters on the inherent characteristics of the pipeline vibration has a certain rule, and it is feasible and effective to avoid the resonance instability by changing the parameters of the support parameters.
Key words: big airplanes；multi support aviation hydraulic pipeline；supporting element; vibration characteristic analysis