Abstract
Ride comfort plays important role in designing the vehicle seat and it can be affected by both statics and dynamic factors. The comfort of a seat is mainly contributed by the seat cushion foam and nowadays, the common material used as seat cushion is open celled polyurethane foam. Under dynamic condition, seat dynamic behaviour can be evaluated by measuring it’s dynamic stiffness. The purpose of this study in this paper was to investigate the seat dynamic stiffness of three different seats from different car models to provide better understanding of how seat is designed and selected. The seats were tested using indenter testing rig at different preloads of 200N, 400N and 600N and subjected to random vibration from 1Hz to 80Hz at 0.4ms-2, 0.8ms-2 and 1.2ms-2 root means square (r.m.s). It can be observed that the stiffness and damping did not change much with the variation of vibration magnitude. However, the seat stiffness and damping exhibited significant changed as preload increased. The result of this work can provide an insight for engineers and seat designers on how the preload and vibration magnitude can affect the comfort of seat under vibration.
Citation:
Hassan, A., Rezali, K., Jalil, N., As’Arry, A., & Azizan, M. (2022). Effects of preload and vibration magnitude on the dynamic stiffness of vehicle seat. In International Institute of Acoustics and Vibration (Ed.), Proceedings of the 28th International Congress on Sound and Vibration (ICSV28), Singapore, 24–28 July 2022 (pp. 2544–2551). Curran Associates, Inc.
Hassan, A., K. Rezali, N. Jalil, A. As’Arry, and M. Azizan. “Effects of Preload and Vibration Magnitude on the Dynamic Stiffness of Vehicle Seat.” Proceedings of the 28th International Congress on Sound and Vibration (ICSV28), 24–28 July 2022, Singapore. Curran Associates, Inc., 2023, pp. 2544–2551.
A. Hassan, K. Rezali, N. Jalil, A. As’Arry, and M. Azizan, “Effects of preload and vibration magnitude on the dynamic stiffness of vehicle seat,” in Proc. 28th Int. Congr. Sound Vib. (ICSV28), Singapore, Jul. 24–28, 2022, pp. 2544–2551.