Ride dynamics mathematical model for a single station representation of tracked vehicle |
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| Institution: | 1. Center for Engineering Analysis and Design, Combat Vehicles R&D Establishment, DRDO, Chennai 600054, India;2. Department of Engineering Design, Indian Institute of Technology, Madras, Chennai 600036, India;1. Department of Civil and Environmental Engineering, Louisiana State University, 3240K Patrick F. Taylor, Baton Rouge, LA 70803, USA;2. Upper Great Plains Transportation Institute, North Dakota State University, 1340 Administration Ave., Fargo, ND 58108, USA;3. Computer Science and Engineering Division, School of Electrical Engineering and Computer Science, Louisiana State University, 102F Electrical Engineering Building, Baton Rouge, LA 70803, USA;1. College of Engineering, China Agricultural University, Beijing 100083, China;2. College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;3. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123, USA;1. Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan;2. Faculty of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan |
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| Abstract: | Tracked vehicles are exposed to severe ride environment due to dynamic terrain-vehicle interactions. Hence it is essential to understand the vibration levels transmitted to the vehicle, as it negotiates different types of terrains at different speeds. The present study is focused on the development of single station representation of tracked vehicles with trailing arm hydro-gas suspension systems, simulating the ride dynamics. The kinematics of hydro-gas suspension system have been derived in order to determine the non-linear stiffness characteristics at various charging pressures. Then, incorporating the actual suspension kinematics, non-linear governing equations of motion have been derived for the sprung and unsprung masses and solved by coding in Matlab. Effect of suspension non-linear dynamics on the single station ride vibrations have been analyzed and validated with a multi-body dynamics model developed using MSC.ADAMS. The above mathematical models would help in estimating the ride vibration levels of the tracked vehicle, negotiating different types of terrains at various speeds and also enable the designers to fine-tune the suspension characteristics such that the ride vibrations are within acceptable limits. The mathematical ride model would also assist in development of non-linear ride vibration model of full tracked vehicle and estimate the sprung mass dynamics. |
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| Keywords: | Tracked vehicle Hydro-gas suspension Trailing-arm suspension Multi-body dynamics Ride dynamics |
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