Volume 15 Issue 3
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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2015  >  15(3): 109-117
JIANG Kang, ZHANG Meng-ya, CHEN Yi-kai. Driving safety analysis of semi-trailer train at circular curve section in mountain area[J]. Journal of Traffic and Transportation Engineering, 2015, 15(3): 109-117. doi: 10.19818/j.cnki.1671-1637.2015.03.013
Citation: JIANG Kang, ZHANG Meng-ya, CHEN Yi-kai. Driving safety analysis of semi-trailer train at circular curve section in mountain area[J]. Journal of Traffic and Transportation Engineering, 2015, 15(3): 109-117. doi: 10.19818/j.cnki.1671-1637.2015.03.013
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Driving safety analysis of semi-trailer train at circular curve section in mountain area

doi: 10.19818/j.cnki.1671-1637.2015.03.013

  • School of Transportation Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

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  • Author Bio:

    JIANG Kang(1974-), male, associate professor, PhD, +86-551-63831825, kangj@hfut.edu.cn

  • Received Date: 2015-01-09
  • Publish Date: 2015-06-20
    Abstract
  • According to the characteristics of circular curve section for mountain area, the stress and deformation conditions of tire were analyzed, and the dynamics coupling model of semi-trailer train and the circular curve section in mountain area was established. The tire slip angles and articulation angle of tractor and semi-trailer were taken as indexes, the influences of the radius, superelevation and sliding adhesion coefficient of circular curve section on the driving safety of semi-trailer train under various speeds were analyzed by using the proposed dynamics simulation method, and the calculation results among running speed method, theoretic limit speed method and dynamics simulation method were compared. Simulation result shows that when the circular curve radius is 125 m, the superelevation is 2 %, the sliding adhesion coefficients are 0. 20, 0. 35, 0. 50 and 0.80 respectively, the critical safe speeds are 20, 35, 55, 72 km · h-1 by using dynamics simulation method, all the critical safe speeds are 50 km · h-1 by using running speed method, and the critical safe speeds are 20, 35, 55, 72 km· h-1 by using theoretic limit speed method respectively. When the circular curve radius is 250 m, the sliding adhesion coefficient is 0. 35, the superelevation are O, 2%, 40/40 and 6% respectively, the critical safe speeds are 35, 38, 25, 20 km · h-1 by using dynamics simulation method respectively, all the critical safe speeds are 60 km · h-1 by using running speed method, and the critical safe speeds are 30, 31, 32, 33 km · h-1 by using theoretic limit speed method respectively. When the superelevation is 6%, the sliding adhesion coefficient is O. 50, the circular curve radii are 125, 250, 400, 650 m respectively, the critical safe speeds are 58, 62, 70, 72 km ~ h-~ by using dynamics simulation method respectively, the critical safe speeds are 50, 60, 68, 71 km ·h-1 by using running speed method respectively, and the critical safe speeds are 28, 37, 48, 60 km · h-1 by using theoretic limit speed method respectively. In the proposed dynamics simulation method, the vehicle suspension dynamics characteristic, weather and road conditions are considered, and the running state of semi-trailer train can be described accurately.

     

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