The Optimization Of Rubber Spring Of Heavy-duty Truck

With the quick development of heavy truck industry, the customer becomes more and more concerned about the quality of suspension. The rubber suspension draws people’s attention for its better quality. However, the rubber suspension cannot perform good enough for the reason that the traditional design method of parts of rubber suspension is backward. This article using the finite element method and optimization method analyze a rubber spring. According to its rigidity, optimization method is applied to change the parameters of the rubber spring aimed at the design scheme.This article introduces the models of rubber, and research the relationship between the strain and stress. Several frequently used rubber models are introduced, and the traditional method to obtain the parameters of models is introduced. Meanwhile, another quick method is studied to build the Mooney-Rivlin model. Compared the old method, the method based on hardness is quicker and more convenient.The rubber buffer is selected to verify the correction of the new method. The finite element model of the rubber buffer is built. Through the comparison between the rigidity line obtained from computation with the experiment data, it is obvious that the two lines are very close, so it is identified that the new method is valid and useful.The ANSYS software is introduced and the nonlinear finite element method of rubber is studied. Moreover, the key techniques of building the model of rubber parts are described carefully. Using the method based on hardness, the parameters of Mooney-Rivlin model is obtained, and the half finite element model of rubber spring is built which lay a solid foundation for the optimization of rubber spring.This article studies the basic concepts of Taguchi method. Aimed at the difficulties of design, the Taguchi method is applied to the design of rubber spring. The orthogonal table L25is determined, and the optimal parameters are obtained by using a few of orthogonal experiments which can save a lot of cost of design and improve the efficiency of design. With the optimization of four parameters including the size of the loading facet the horizontal abscissa of supporting facet, the height of the cone of rubber spring, and the vertical abscissa of supporting fact, the influence of these parameters are studied which reduce the difficulty of design the rubber spring. Meanwhile, this article verifies the effectiveness of Taguchi method and provides model and experience for other design and optimization for other rubber parts.