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LU: Peng-min, YOU Jin-min, HE Li-mei. Vehicle dynamic load property resulted from road random roughness[J]. Journal of Traffic and Transportation Engineering, 2007, 7(6): 55-58.
Citation: LU: Peng-min, YOU Jin-min, HE Li-mei. Vehicle dynamic load property resulted from road random roughness[J]. Journal of Traffic and Transportation Engineering, 2007, 7(6): 55-58.
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Vehicle dynamic load property resulted from road random roughness

  • 1.

    Key Laboratory of Highway Construction Technology and Equipment of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

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  • Author Bio:

    Lu Peng-min(1957-), male, professor, + 86-29-82334322, lpmin@chd.edu.cn

  • Received Date: 2007-06-12
  • Publish Date: 2007-12-25
    Abstract
  • Road random roughness was simulated by using inverse fast Fourier transform(IFFT) in time domain, a half-vehicle dynamics model was established, the effects of road grade, vehicle velocity, loading capacity and vehicle parameters on vehicle dynamic load were studied by Runge-Kutta method, and the rules of vehicle dynamic load caused by road roughness were studied.Simulation result indicates that vehicle dynamic load increases obviously with the intensification of road roughness; vehicle dynamic load and the dynamic load coefficient increase with the increase of vehicle speed, their peak values appear nearby inherent frequency; dynamic load coefficient decreases and vehicle dynamic load increases with the increase of loading capacity, so overload phenomena is strictly limited; increasing tire stiffness and decreasing suspension damping can lead to the increase of vehicle dynamic load and dynamic load coefficient, so the use of high pressure tire should be limited and the selection of suspension damping should be reasonable.

     

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