Relative ride performance analysis of a torsio-elastic suspension applied to front, rear and both axles of an off-road vehicle
by Mu Chai; Subhash Rakheja; Wen-Bin Shangguan
International Journal of Heavy Vehicle Systems (IJHVS), Vol. 26, No. 6, 2019

Abstract: Relative ride performance potentials of a torsio-elastic suspension applied to front or rear or both axles of an off-road vehicle are investigated. A three-dimensional vehicle model, incorporating a torsio-elastic suspension, is used to evaluate relative ride responses with different suspension arrangements. The model validity is demonstrated using the reported field-measured responses of a rear-suspended forestry vehicle. The optimal parameters of the suspension configurations are identified by minimising the vector sum of a_v and frequency-weighted rotational vibration. Relative ride performance potentials of different suspensions are subsequently investigated for the loaded and unloaded vehicle in terms of frequency-weighted rms accelerations. The results show that the torsio-elastic suspension is relatively insensitive to variations in vehicle load. It is shown that the suspension applied to axle of the vehicle unit supporting driver cabin is more effective in limiting driver vibration, while preserving effective roll stiffness. The fully-suspended vehicle, however, yields most effective vibration attenuation.

Online publication date: Wed, 02-Oct-2019

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