吉林大学学报(工学版) ›› 2004, Vol. ›› Issue (3): 367-372.

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Theoretical analysis and numerical calculation for driving stability of articulated-frame vehicles

LIU Gang1, ZHANG Zi-da2   

  1. 1. Department of Foundation, The Second Aeronautical Institute of the Airforce, Changchun 130022, China;
    2. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2003-11-15 Online:2004-07-01

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Abstract: In order to obtain critical speed when articutaled-frame vehicles(AFV) drive stability, the driving stability of AFV with hydraulic steering system moving along a straight or a small curvature road was studied.Idealized into a model composed of a front and rear body,taking both the elastic characteristics of hydraulic steering system and tire ride slip behavior into account, a linear dynamic equation system for the driving stability of AFV was established.Two methods of judging the driving stability of AFV were presented:the eigenvalue method and the method of steady response under constant input,and the expressions of stability factor and critical vehicle speed were derived.Two forms of instability of AFV were shown.The frequency response characteristics were discussed preliminarily.Two methods on sensitivity analysis for dynamic correction of AFV critical speed were suggested,i.e. direct derivation method based on the steady response and eigenvalue method based on complex eigenvalue analysis.Finally,the critical speed of the ZL10 loader was calculated as an example.

Key words: vehicle engineering, articulated-frame vehicle, driving stability, tire side slip characteristics, hydraulic steering system, critical speed

CLC Number: 

  • U467
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