吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (6): 1669-1676.doi: 10.13229/j.cnki.jdxbgxb201706001

• Orginal Article •     Next Articles

Fluid-induced vibration and flow mechanism of automotive external rearview mirror

WANG Jing-yu1, YU Xu-tao2, HU Xing-jun1, GUO Peng2, XIN Li2, GUO Feng2, ZHANG Yang-hui2   

  1. 1.State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China;
    2.College of Automotive Engineering,Jilin University,Changchun 130022,China
  • Received:2016-08-04 Online:2017-11-20 Published:2017-11-20

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Abstract: Based on fluid-solid interaction method, simulation analysis of the flow around the external rearview mirror was carried out to investigate the mechanism of fluid-induced vibration, and the main vibration forms were described. First, the rigid external rearview mirror model was investigated to get the drag coefficient Cd, and lift coefficient Cl, which provide a comparison basis for the study of fluid-induced vibration and verify the feasibility of the simulation program. Then, the flow around the external rearview mirror was simulated by numerical method to investigate the vibration characteristics of the mirror under different velocities. The changes of the drag and lift coefficients, vibration amplitude, frequency of vortex shedding and other parameters with the velocity were obtained. Results show that strong vibration of the mirror occurs when the vertex shedding frequency is approach to the structural natural frequency of the external rearview mirror, and the vibration strength is far greater than the impact strength of the wind.

Key words: vehicle engineering, rearview mirror, fluid-solid interaction, vehicle aerodynamics, vortex-induced vibration, finite element method

CLC Number: 

  • U461.1
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