摘要
使用DrivAer简化模型,采用双向流固耦合方法对外后视镜的风致振特性进行研究,在STAR-CCM+中进行流场计算、采用Abaqus进行固体仿真,在协同仿真平台交换数据.仿真对比研究了后视镜固定与振动以及有无侧风时的尾流结构和振动特性.研究结果表明,受车身影响,后视镜边缘脱落的旋涡在尾流中未充分发展,涡激振动作用很小,镜面振动主要受风速主导,振动频率锁定于27.8 Hz不变,振幅随风速的提高而增强;当存在侧风时,流场对后视镜的作用力紊乱,低频区不再显示主频作用,且镜面振动加剧,此时涡脱在尾流中充分发展,恢复了较强的约164.5 Hz的高频涡激振动作用.
The wind-induced vibration of the car rearview mirror blurs the image,which brings great danger to driving safety.The method of two-way FSI(Fluid-Structure Interaction)was applied to the numerical simulation on the vibration problem of rearview mirror caused by airflow around the Driver model.STAR-CCM+and Abaqus were used for co-simulation.According to the comparison and analysis of the vibration characteristics of fixed rearview mirror as well as the rearview mirror with wind-induced vibration at different flow velocity and under the condition of side wind,the conclusion can be drawn as follows:as it is affected by the vehicle body,the vortex falling from the edge of mirror is difficult to develop in the wake,which limits the vortex-induced vibration.The mirror vibration is dominated by the wind speed,the vibration frequency is maintained at 27.8 Hz,and the higher wind speed results in the larger amplitude.When there is crosswind,force of the flow field on the rearview mirror is disordered,dominant frequency disappears in the low frequency area,and the vibration intensifies.In this situation,the vortex is fully developed in the wake,which induces the strong vibration of about 164.5 Hz.
作者
兰巍
和生泰
胡兴军
郭峰
王泽伟
LAN Wei;HE Shengtai;HU Xingjun;GUO Feng;WANG Zewei(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun130022,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第10期10-18,共9页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50805062)~~
关键词
外后视镜
风振特性
双向流固耦合
汽车空气动力学
流场
车辆工程
exterior rear view mirror
wind vibration characteristics
bidirectional fluid-solid interaction
automobile aerodynamics
flow field
vehicle engineering
