Numerical analysis on tractive performance of off-road wheel steering on sand using discrete element method |
| |
| Institution: | 1. State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China;2. Mechanical Engineering, University of Michigan, Ann Arbor 48105, USA;1. Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775-5905, United States;2. Department of Mining and Geological Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775-5800, United States;1. Advanced Vehicle Dynamics Laboratory (AVDL), Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States;2. Center for Tire Research (CenTiRe), Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States;1. Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, USA;2. U.S. Army TARDEC, MI, 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;1. Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS 39762, USA;2. Dept. of Civil and Environmental Engineering, Mississippi State University, Mississippi State, MS 39762, USA;3. U.S. Army Engineer Research and Development Center (ERDC), 3909 Halls Ferry Road, Vicksburg, MS 39180. USA |
| |
| Abstract: | This paper presents a numerical analysis on steering performance including tractive parameters and lug effects. To explore the difference between the turning and straight conditions of steering, a numerical sand model for steering is designed and appropriately established by the discrete element method on the basis of triaxial tests. From the point of mean values and variation, steering traction tests are conducted to analyze the tractive parameters including sinkage, torque and drawbar pull and the lug effects resulting from type, intersection and central angle. Analysis indicates that steering motion has less influence on the sinkage and torque. When the slip ratio exceeds 20%, the steering drawbar pull becomes increasingly smaller than in the straight condition, and the increase of steering radius contributes to a decline in mean values and a rise in variation. The lug effect of central angle is less influenced by the steering motion, but the lug intersection is able to significantly increase the steering drawbar pull along with the variation reduced. However, the lug inclination reduces the steering drawbar pull along with the variation raised in different degrees. |
| |
| Keywords: | Steering Off-road wheel Tractive parameter Lug effects Discrete element method |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
