【作者】 王大伟；

【导师】 林柏忠；

【作者基本信息】 吉林大学 ， 车辆工程， 2014， 硕士

【摘要】 轮胎力学特性是车辆动力学研究的基础，长久以来，人们通过不同的轮胎建模方式来研究轮胎的力学特性。已有的建模工作多集中于轮胎稳态特性，对非稳态特性研究也仅限于单一运动方向下轮胎与路面假设附着时线性区特性的讨论；主流的轮胎模型多采用半经验方法将基于线性区推导得到的微分方程推广到非线性区，利用稳态模型来计算轮胎的非稳态非线性特性，这种方法使得轮胎复杂运动下非稳态特性的建立过程没有合理的理论基础。于此同时，随着轮胎运动输入、路面摩擦特性、轮胎接地印迹形状以及压力分布复杂性的提升，使得理论模型的推导变得异常困难，这也限制了它的理论指导作用。基于以上原因，结合以往离散仿真模型的建模思路，本文主要开展了以下研究工作：1、不考虑胎宽的侧偏纵滑离散仿真模型建模。首先从简单的建模方式出发，不考虑胎宽因素的影响，假定轮胎接地印迹区为一条直线，认为轮胎在胎宽方向上具有相同的压力分布和变形，推导出在侧偏纵滑复合滑移工况下，所建不考虑胎宽的离散仿真模型对轮胎纵向力、侧向力以及回正力矩的表达公式。同时确定该工况下离散仿真模型的迭代求解方法和收敛条件，为进一步考虑复杂因素的侧偏纵滑精细离散仿真模型奠定基础。2、考虑复杂因素的侧偏纵滑精细离散仿真模型建模。考虑轮胎的宽度、接地印迹形状的变化以及接地印迹区的压力分布形式这三个因素对印迹区力学特性的影响，确保所建离散仿真模型能在定性表达的基础上实现对相关力学特性的定量表达。3、典型复合滑移非稳态工况的模型仿真验证。基于建立的离散仿真模型以及相关轮胎非稳态试验数据进行模型的仿真验证，以对其定性表达能力有直观的判定。更多还原

【Abstract】 The tire mechanic characteristic is the fundamental of vehicle dynamics. Peopleapproach to study the mechanical properties of the tire with different tire modeling methodfor a long time. The modeling work has been more focused on the steady-statecharacteristics of the tire. The study of unsteady characteristics is limited to a singledirection of movement of the tire and the linear region characteristics of road adhesion.Most of tire model extended the result based on the linear region to nonlinear zone in thesemi-empirical method. Make use of the steady-state model to calculate the unsteadynonlinear characteristics of tire. This approach makes the tire unsteady characteristics builtunder the complex sports have no reasonable theoretical foundation. Meanwhile, as thetire movement input, the road surface friction characteristics, the tire contact patch shapeand pressure distribution become more complex, derivation of the theoretical modelbecomes extremely difficult, the theoretical guidance is also limited. Based on the abovereasons, combining modeling discrete simulation models, this article about the researchwork are carried out as below:1. Discrete simulation modeling without considering the wide of the tire. First,starting from simple modeling and the tire width is not a considered factor. The tirecontact patch area is assumed as a straight line. Consider a tire having the same pressureand deformation distribution in the tire width direction. Under cornering composited withlongitudinal sliding condition, equation of discrete simulation models for lateral force,longitudinal force and aligning torque are deduced, meanwhile, tease out an iterativemethod for solving the model. This also lays the foundation for fine discrete simulationmodels with further consideration of complex factors. At the same time, it can be acomparison model to analyze the influence of different factors on the expression of themechanical properties of the tire.2. Fine discrete simulation modeling considering complex factors. Considering theeffects of tire width, shape change, and pressure distribution in contact patch area acted on the mechanical properties to improve the ability of the model to express the differentconditions of the mechanical properties of the tire and provide a basis for the developmentof physical models with high precision.3. Typical tire steady and non-steady state conditions simulation. Based on discretesimulation model and the associated tire steady and unsteady test data,make theverification of the model.更多还原