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Development of Simulation System on Vehicle-Occupant Dynamic Interaction Shuji NISHIYAMA My first report detailed a theoretical analysis and verification of a simulation system for vehicle-occupant dynamic interaction. This simulation system can be used as a tool to investigate the effects of physical variables that influence automobile ride comfort. In former reports，the effects of sitting posture of seat system for occupants and parameter of seat/occupant system on human dynamic behavior were investigated. This paper presents the effects of seat positions of occupant system on human dynamic behavior. Both frequency response in the frequency range of 1 to 30Hz and transient response considering the surface roughness of irregularity at the speed of 40, 80，and 160km/h for different seat positions are investigated．As a result, it is found that seat positions of occupant seat system exert a serious influence upon human vibration. Key Word : Simulation, Coupled Vibration, Human Engineering, Aautomobile, Seat Ride Comfort, Vehicle Dynamics, Seat Position, Parameter Study |
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