PREDICTION OF SEAT VIBRATION WITH A SEATED HUMAN SUBJECT USING A SUBSTRUCTURE SYNTHESIS METHOD. IN: HUMAN FACTORS IN DRIVING AND TELEMATICS, AND SEATING COMFORT

The paper describes a method of predicting seat vibration transmissibilities with a seated human subject from acceleration data measured for the seat assembly with and without a rigid mass. This prediction method takes into account the nonlinearity of seat vibration and ease of measurement. It can be easily applied to experiments involving cars because it does not require measurement of reaction forces. The use of the human body in the prediction appeared to improve the accuracy of the prediction by using the driving point apparent masses in the lateral direction, transfer apparent masses of the buttocks in the vertical direction, and those of the backrest in the fore-and-aft direction, which were calculated from the transmissibilities of actual vehicle seats with human subjects.