摘 要: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。
关键词:空气悬架;互联管路;模态分析
中图分类号:U463.33 文献标识码:A 文章编号:2096-4706(2019)19-0167-04
Modal Analysis of U-bend of Air Suspension Interconnecting Pipeline of Bus
XIANG Feifei
(School of Automotive Engineering,Jiangxi University of Technology,Nanchang 330098,China)
Abstract: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 0.8mm and 0.3mm respectively. Results the dynamic characteristics of the curved pipe were obviously affected by the surface and wall thickness.
Keywords:air suspension;interconnection pipeline;modal analysis
基金项目:江西省科技计划项目:空气悬架结构件疲劳耐久性设计关键技术研究(项目编号:20161BBE50053);江西省教育厅科技技术研究项目:基于低载强化的悬架疲劳加速试验方法研究(项目编号:GJJ180976);江西省汽车服务工程及产业升级协同创新中心开放基金资助项目:汽车悬架耐久性试验载荷谱的优化研究(项目编号:18XTKFYB03)。
参考文献:
[1] WOLFMONHEIM F,S CHUMACHER M,FRANTZEN M,et al. Interlinked air suspension systems -the influence on ride comfort in testing and simulation [J].ATZ Auto Technology,2009,9(3):58-61.
[2] 李仲兴,管晓星,郭子权,等. 横向互联空气悬架互联管路模态分析 [J]. 广西大学学报(自然科学版),2017,42(6):2008-2014.
[3] 王斌华,吕彭民. 五节臂混凝土泵车的有限元建模与模态分析 [J]. 广西大学学报(自然科学版),2011,36(5):735-739.
[4] J I A N G H,Q I A N K,J U L,e t a l . S imu l a t i o n a n d Experimental Study on Static and Dynamic Characteristics of Laterally Interconnected Air Suspension [J].Applied Mechanics and Materials 2014,577:273-276.
[5] 黄志超,程俊,管昌海,等. 汽车扭力梁后悬架模态分析 [J]. 机械设计与研究,2018,34(1):107-112.
[6] 杜平,胡夏夏. 管路系统的模态分析 [J]. 轻工机械,2012,30(3):29-31+35.
[7] 洪如瑾,陆海燕.NX CAE 高级仿真流程 [M]. 北京:电子工业出版社,2012.
作者简介:项菲菲(1988-),女,汉族,江西宜春人,讲师,硕士,研究方向:汽车安全技术。