A coupled tire structure/acoustic cavity model |
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| Institution: | 1. Vibration and Acoustics Laboratories, Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Office 12-B Randolph Hall, Blacksburg, VA 24061-0238, USA;2. Michelin North America, Inc., Noise and Vibration Team, 515 Michelin Rd., Greenville, SC 29062-198, USA;1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. Western Superconductor Technology, Co. Ltd, Xi’an 710018, China;1. School of Power and Energy, Jiangsu University of Science and Technology, No. 2 Mengxi Road, Zhenjiang, 212000, PR China;2. College of Energy and Power Engineering, Harbin Engineering University, 145 Nantong Road, Harbin, 150001, PR China;3. Faculty of Maritime and Transportation, Ningbo University, Ningbo 315000, PR China;1. Naval Surface Warfare Center, Carderock Division, Bethesda, MD 20817, United States;2. MIT-Lincoln Laboratory, Lexington, MA 02420, United States |
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| Abstract: | The dynamic characteristic of the tires is a key factor in the road-induced interior noise in passenger vehicles. The tire acoustic cavity is a very important factor in the tire dynamics and it must be considered in analyses. This paper describes a closed form analytical model for tire-wheel structures. In order to incorporate the dynamics of the cavity on the tire response, the tire acoustic-structure coupled problem is solved simultaneously. The tire is modeled as an annular cylindrical shell where only the outside shell is flexible, i.e. tire sidewalls and wheel are assumed rigid. From the analytical solution of the eigenproblems, both the tire structure and cavity acoustic responses are expanded in terms of their eigenfunctions. The main objective of the model is to have an efficient tool to investigate the physical coupling mechanisms between the acoustic cavity and the tire structure without the need of complicated numerical model such as finite elements. The result shows that the proposed model captures the main mechanisms of the effect of the tire air acoustic on the tire dynamics. |
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