【车辆自激振动机理与试验研究】葛剑敏.pdf

Ph.D.Dissertation MechanismandExperimentStudyontheSelf-Excited Vibration inVehicle Ph.D.Ge Jianmin Adviser:Prof.Zheng Lianzhu Prof.Wang Dengfeng Academic Degree Applied for:Doctor of Engineering Major:Vehicle Engineering Date of Submission:November10,1998 Date of Defence:January 11,1999 Unit an

吉林工业大学博士学位论文量了滚动状态下轮胎的垂直和切向动态刚度与阻尼,回归出轮胎动态径向和切向刚度与阻尼的半经验公式。得出了随着轮胎滚动速度的增加,轮胎的径向和切向动态刚度与阻尼逐渐减小的结论。推导出轮胎附着系数的计算公式,求出了最大附着系数对应的滑转率,计算出的附着特性曲线与试验测得的附着特性曲线基本吻合,说明所建轮胎模型是正确的.6、研究了车辆动力传动系配合件的摩擦扭矩和轴的内摩擦扭矩产生的机理及其变化规律。由Stribeck曲线可知:随着牵引负荷的增加,传动系扭转振动的幅值增大,传动系配合件的表面润滑条件恶化,由正常的混合润滑状态(或液体润滑状态)转化为边界润滑状态,使传

PH.DDissertation andinputtothesystemby adhesionforce andcoupledforceareestablishedandtherelationship curves ofvibration energyandthe amplitude of theself-excitedvibrationaredrawn.The controlling(restraining)partof theself-excitedvibrationisfoundandverifiedbytheexperimental result,whichhinderstheampl