【作者】 杨磊；

【导师】 韩善灵；

【作者基本信息】 山东科技大学 ， 车辆工程， 2011， 硕士

【摘要】 汽车轮毂是汽车上的重要部件,不仅影响汽车行驶的安全性、舒适性,还直接影响汽车的外观效果。目前,汽车轻量化已经成为汽车工业发展的趋势。镁合金作为最轻的工程金属材料之一,具有比强度高,阻尼减震性好,散热性好以及可回收利用等性能特点,非常适合用作汽车轮毂的轻量化材料。有限元法是工程分析的重要手段,为汽车轮毂的静态强度分析和动态疲劳分析提供了强有力的工具。本文采用质量功能展开和TRIZ理论两种设计方法对汽车轮毂进行了轻量化设计。结合国家标准中对汽车轮辋的规定和相关行业规范,设计了一个八辐板式的13英寸小型镁合金汽车轮毂。利用三维设计软件UG NX 7.0建立了三维数字模型。在此基础上,运用有限元方法,对所设计的镁合金汽车轮毂进行了静态结构分析。结果表明,应力较大的部位主要分布在辐板与轮辋相交区域和螺栓孔区域,最大应力小于镁合金的屈服强度。汽车轮毂不仅受到静态载荷的作用,还受到交变载荷的作用。根据国家标准GB/T5334-2005中对汽车轻合金车轮的性能要求和试验方法的规定,以及汽车轮毂在工作状态受循环载荷的特点,运用有限元方法对所设计的镁合金汽车轮毂进行了动态弯曲疲劳分析和动态径向疲劳分析。分析结果表明,所设计的镁合金汽车轮毂的疲劳强度满足试验中的要求,同时还预测了镁合金汽车轮毂的疲劳寿命。更多还原

【Abstract】 The automobile wheel is an important part of the automobile. It not only affects the safety and comfort of the moving automobile, but also affects the appearance of the automobile. Now automobile lightweight has become the development trend of the automotive industry. Magnesium alloys have the properties of high relative strength, good shock absorption capability, good heat dissipation and recycling use as one of the lightest engineering metal material. It is very suitable for the lightweight materials of automobile wheel. The finite element analysis is an important method for the engineering analysis. It is also a useful tool for the static strength analysis and dynamic fatigue analysis of the automobile wheel.Lightweight design of the automobile wheel has been carried out by using quality function deployment and TRIZ. A small-sized magnesium alloy automobile wheel with eight spokes is designed based on the national standard about automobile wheel rim and relevant industry standards. And the digital model is established by the three-dimensional design software UG NX. The static structural analysis of the magnesium alloy automobile wheel has been simulated with the advanced simulation module of UG NX. The result shows that the high stress distributes mainly in the region of bolt holes and the transitional region between the wheel rim and spokes. The maximum stress is less than the yield strength of magnesium alloy.The automobile wheels usually suffer the static and cyclic loading. Dynamic bending fatigue analysis and radial fatigue analysis of the designed magnesium alloy automobile wheel have been simulated based on the national standard GB/T 5334-2005 about the performance requires and test method of the automobile light alloy wheel. The result shows that the fatigue strength of the designed magnesium alloy automobile wheel satisfies the test require. The fatigue life of the magnesium alloy automobile wheel has been predicted.更多还原