中文摘要：

基于双横臂独立悬架运动特性,推导出三种不同形式扭杆安装方式对应的悬架线刚度计算公式.以某校车前双横臂独立悬架为例,依据公式中扭杆刚度与悬架线刚度的关系,分别计算并设计出满足要求的扭杆.创建三种形式扭杆安装方式对应的前悬架动力学模型并进行仿真实验,研究车轮跳动时悬架各定位参数的变化,结果表明双联扭杆弹簧独立悬架能够较好地控制车辆的操纵特性.弹簧的刚度和导向机构的形式共同决定悬架线刚度的非线性特性,不同的非线性特性对车辆的操纵性和行驶平顺性产生的影响不同.

英文摘要：

Suspension＇s linear stiffness computational formulas were derived based on the movement characteristic of double wishbone independent suspension with three different kinds of installation of torsion bar spring.Took the double wishbone front independent suspension of a school-bus as example,needed torsion bars were established depending on the relationship between torsion＇s stiffness and suspension＇s linear stiffness.Dynamics models were established and simulations were carried out to study the variation of suspension parameters against wheel travel.The outcomes prove that twin torsion bar independent suspension has better handling characteristics.The form of spring stiffness and steering mechanism jointly determine the characteristics of suspension nonlinear lines stiffness,and different nonlinear characteristics exert different influence on vehicle maneuverability and the riding comfort.