In this study the ride values of passenger cars are investigated for Korean subjects based on the vibration of the human bodies. When three subjects are excited by driving a vehicle on the road, their responses of acceleration are measured at 12 points on their bodies according to Griffin's 12 axis system: 3 translational axes on a seat surface, 3 rotational axes on a seat surface, 3 translational axes at the seat back, and the 3 translational axes at the feet. Since one of the most important parameters for ride comfort is the level and duration of the root mean square acceleration experienced, the following ride values are evaluated for four different vehicles: the seat effective amplitude transmissibility (SEAT), the component ride value, and the overall ride value based on acceleration root mean square. For this purpose, frequency weighing functions and axis multiplying factors are used. The ride indices are also studied considering the seat dynamic characteristics with subjects. (A)
Samenvatting