基于某非承载式白车身的模态性能分析

Modal Performance Analysis Based on a Non-loaded Body-in-white

文章所用车身为某车厂开发的一款新型商用车,车身结构为非承载式车身,相较于承载式车身而言,非承载式车身多了底盘大梁架,在遇到碰撞或者冲击时,车架的振动通过弹性单元传到车身,可以削减大部分冲击力,车身的安全性得以保证,在恶劣道路上,可以保证其稳定性和舒适性,车内噪声和振动也较小。车身主要包括了白车身、车门、座椅、中控、内外饰等主要总成。车身主体大部分都是钣金类零部件,文章所述的车身钣金件有624个,文章完成了车身钣金件的网格划分和属性赋予,并对白车身整体进行了网格质量的验证,并完成了车身模态从1阶到6阶的校核,证明了白车身模态的合理性。

The body used in this article is a new commercial vehicle developed by a car manufacturer.The body structure is a non-loaded body.Compared with the load-bearing body,the non-loaded body has more chassis girder.When encountering collision or impact,the car The vibration of the frame is transmitted to the vehicle body through the elastic unit,which can reduce most impact forces,ensure the safety of the body,ensure stability and comfort on the bad roads,and reduce noise and vibration inside the car.The body mainly includes main assembly such as body-in-white,door,seat,central control,interior and exterior decoration.Most of the body parts are sheet metal parts.There are 624 body sheet metal parts described in this paper.This paper has completed the mesh division and attribute assignment of the body sheet metal parts,and verified the grid quality of the body body as a whole.And completed the calibration of the body mode from 1 st to 6 th,which proved the rationality of the body-in-white mode.