Modal Analysis And Optimization Design Of Vehicle Aluminum Alloy Wheel

With the development of economy and society, better saloon car is required by people. Thus it is of key importance to improve the operational performance of the wheel. The wheel not only needs to have good static characteristics, but also good structural dynamic characteristics. By implementing the structural modal analysis using the finite element method, the structural dynamic characteristics of the wheel can be obtained. Due to the complexity of the wheel, it is very difficult to implement the wheel optimization design. A typical wheel optimization design was exploringly studied, and the results show that through the wheel structural optimization design, the weight of the wheel may be reduced further. The benefits are material saving and improving of the vehicles'driving quality. It has vital significance to reduce the cost of the wheel.The FEM model, modal computing, rigidity computing, bending analysis and optimization design were systematically studied for a typical wheel. The FEA software ANSYS was used to establish the three-dimensional geometric model of the wheel. The three dimensional solid element was used to carry out the discretization processing and obtain the finite element model of the wheel. Subsequently, on the basis of simplifying the structure and boundary condition, the FEM models of the wheel's felloe rigidity computing, the wheel modal computing and the wheel bending analysis were built separately.By applying the FE method to carry out the FE modal computing for a Aluminium wheel, the wheel's natural frequency and natural vibration model were obtained. On the basis of finite element theory, the wheel's driving speed was taken into consideration. The wheel's felloe rigidity, natural frequency and the spoke bending stress was taken into consideration in this thesis to carry outthe optimization design of a 17 inch wheel, more reasonable structural parameter of the wheel was obtained.