客车空气悬架互联管路的U型弯管模态分析

Modal Analysis of U-bend of Air Suspension Interconnecting Pipeline of Bus

某互联空气悬架系统的互联管路由于高速气流的冲击,极为容易出现共振,从而造成异响,损坏管路系统。其中U型管由于出现两次折弯,最容易形成气流冲击,出现共振的可能性最大。为了研究U型弯管不同壁厚的特性,基于Siemens NX对U型管进行建模,并进行了模态分析,从分析结果看,若U型管的固有频率较高,则发生共振的可能性较小。此外,为了研究壁厚对U型弯管动态特性的影响,分别对0.8mm和0.3mm两种壁厚的弯管进行了模态分析。结果表明,壁厚对弯管的动态特性影响显著。

Due to the impact of high-speed air flow,the interconnection pipeline of an interconnected air suspension system is very prone to resonance,resulting in abnormal noise and damage to the pipeline system. Among them,the U-tube is most prone to air shock due to its double bending,and the possibility of resonance is the greatest. In order to study the characteristics of different wall thicknesses of u-bend tubes,modeling of U-bend tubes was carried out based on Siemens NX,and modal analysis was conducted. According to the analysis results,the natural frequency of U-bend tubes was relatively high,and the possibility of resonance was relatively small. In addition,in order to study the influence of the wall thickness ratio on the dynamic characteristics of U-bend pipes,modal analysis was conducted for two types of bending pipes with wall thickness of 0.8 mm and 0.3 mm respectively. Results the dynamic characteristics of the curved pipe were obviously affected by the surface and wall thickness.