航空管路块卡离散化模型分析及其对管系振动特性的影响研究

针对航空液压管路在高速高压化发展趋势下谐振失稳现象日益严重的问题,对航空液压管路支撑参数变化引起的管路振动固有特性改变进行了研究。针对多支撑航空液压管系中常见的P卡及块卡等支撑元件,将其对管路的约束作用进行了离散,建立了管路支撑的离散化模型,进一步在ANSYS软件平台中搭建了一段航空液压管系的有限元模型,分别改变支撑数量、支撑位置、支撑刚度和预紧力,分析了参数变化对管系振动特性的影响,得到了支撑参数对管系振动特性的作用规律。研究结果表明,支撑参数对管路振动固有特性的影响具有一定规律,通过改变支撑参数从而避免管路谐振失稳的方法是可行、有效的。

Analysis of the discrete model of the aerial pipeline block and its influence on the vibration characteristics of the pipe system

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. ABSTRACT FROM AUTHOR]