Samenvatting
A recent trend in vehicle seating design is the change in structure from a spring/foam composite to a foam and dead pan structure. For a composite design, the seat vibrational characteristics are tuned for the vehicle by adjusting the spring stiffness. In a dead pan design, however, foam dynamics solely dictate seat vibrational characteristics. Foam vibrational transmissivities measured by a laboratory test are compared with transmissivities measured with human subjects and road profiles. The in-vehicle vibrational performance of the foam has been quantified using the Seat Effective Amplitude Transmissibility (SEAT) method for several vehicle categories. The role of foam dynamics has been quantified for full foam seats. (A)