Abstract
The seats for high speed railway vehicle have vibration characteristics which induce high frequency and torsional vibration. That has a possibility to disturb the ride comfort. To analyze the vibrations mechanisms and to obtain useful information for seat design considering ride comfort, the seat model which has nine-degree-of-freedom is suggested. Backrest and seat base of the seat were modeled by the model, which includes out-of-plane and vertical displacement components of backrest, vertical, longitudinal, pitch, roll and yaw motions of seat base. It can describe the vibration characteristics of the seat against the floor acceleration input. By using the model, the relationship between model parameters and vibration characteristics of the seat was investigated.
