Evaluation of the off-road suspension efficiency for all-wheel-drive vehicles
DOI:
https://doi.org/10.31734/agroengineering2023.27.096Keywords:
suspension failure, vertical vibration accelerations, military wheeled vehicles, simulation model, support surface, elastic-damping characteristicsAbstract
Armed conflicts, especially the Russian-Ukrainian war, have emphasized the importance of high mobility for military vehicles. This requirement increases the need for off-road vehicle designs, especially regarding suspension systems. The maximum speed limitations are determined based on the vibration loads experienced by the driver and crew, caused by irregularities, micro-profile of the terrain, and the respective transmission functions of the suspension and tires.
This article focuses on determining the influence of suspension travel on the speed of movement for a highly mobile multi-purpose wheeled transport vehicle, using the American HMMWV vehicles as an example, which are currently used by the Ukrainian Armed Forces. The study took into account the suspension characteristics, tire properties, and oscillation system of the vehicle. Results show that a larger suspension travel avoids suspension failure within the speed range of 10-60 km/h and provides the necessary mobility and operational lifespan of the suspension system in off-road conditions. The study also obtained recommendations concerning the required values of suspension travel to ensure the necessary mobility of wheeled vehicles, which is crucial during the design phase and the establishment of corresponding legislative regulations, particularly for heavy automotive vehicles. The methodology presented for evaluating suspension efficiency during obstacle traversal allows for quantitatively assessing the maximum speed with consideration of the kinematics of specific vehicle designs.
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