Title: Damping requirement of a suspension seat subject to low frequency vehicle vibration and shock

Authors: Xiao Qing Ma, Subhash Rakheja, Chun-Yi Su

Addresses: CONCAVE Research Centre, Concordia University, 1455 de Maissoneuve West, Montreal H3G 1M8, Canada. ' CONCAVE Research Centre, Concordia University, 1455 de Maissoneuve West, Montreal H3G 1M8, Canada. ' CONCAVE Research Centre, Concordia University, 1455 de Maissoneuve West, Montreal H3G 1M8, Canada

Abstract: Vibration attenuation performance characteristics of a suspension seat are investigated under excitations arising from different road and off-road vehicles. A Two-Degrees-of-Freedom (2-DOF) model of the suspension seat is formulated upon integration of component models, and consideration of the end-stop impacts and potential body-hop motions. Validated analytical model is applied to identify the desirable damping parameters, to achieve improved attenuation of continuous and transient vibration of varying intensities. The results, suggest that a suspension design with relatively higher compression and rebound mode damping would be desirable for realising improved shock and vibration isolation performance for vehicles with predominantly low frequency ride vibration.

Keywords: suspension seat; shock isolation; vibration isolation; performance measures; damping role; nonlinear damping; cushion model; urban buses; construction vehicles; snowploughs; end-stop impacts; vibration attenuation; vehicle design; vehicle vibration; low frequency ride vibration; off-road vehicles; heavy vehicles.

DOI: 10.1504/IJVD.2008.020884

International Journal of Vehicle Design, 2008 Vol.47 No.1/2/3/4, pp.133 - 156

Available online: 22 Oct 2008 *

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