Motorcycle Tire Experimental Modal Analysis And Modeling Of Vertical Features

The motorcycle tire is the support and transmission unit between the motorcycle and road, its static and dynamic characteristic is one of the most important factors that influence the motorcycle running performance. Today in the world, the research of automobile tire and how to build the model of tire dynamics are gradually perfect, but the study for motorcycle tire is few. According to the thought of using modal parameters of the tire to build tire model, this paper have studied the motorcycle tire of type YX—P27 and obtained the modal parameters. Then the motorcycle vacuum rear tire model for static vertical properties is built by using the experimental modal parameters. The different characteristics of deformation of the carcass and the crown, and their roles in the produce of contact patch are discussed. The iterative algorithm is adopted to solve the equation of the tire mode. Finally, this paper discusses the dynamic vertical properties by using the modal parameters. The chief research of the paper is as follows:1. In this paper, the modal experiments of the motorcycle vacuum rear tire are carried out with the excitation in radial and tangential direction while the responses both in radial and tangential directions are measured, and also the modal parameters have been obtained successfully.2. This paper has built a model for the motorcycle vacuum rear tire by using modal parameters and also developed a method for researching vertical properties of motorcycle vacuum rear tire.3. The model experiment platform was built by the virtual instrument measurement technology where the hardware is composed by Lance sensor; signal conditioning instruments and NI data acquisition cards, and the software is N-modal 3.0 developed by NUAA. The actual application showed that the experiment platform is successful.