TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C · 1993 · 26 citations · 2 references
EngineeringAutomotive EngineeringSystems EngineeringStructural DynamicsSystem DynamicsVehicle DynamicsOccupant KinematicsRide ComfortRide DynamicsVehicle ModelingVehicle VibrationHighway EngineeringOccupant InteractionOccupant Interaction ModelingRide Comfort AnalysisSeat Ride ComfortSystem VerificationVehicle Dynamics SimulationVehicle Oscillation Analysis
Vehicle movement critically affects ride comfort, requiring reliable analysis and simulation systems that treat the vehicle and occupant as a dynamically coupled oscillation. This study develops and verifies a simulation system for vehicle‑occupant dynamic interaction to investigate how physical variables influence automobile seat ride comfort. The system employs a 12‑degree‑of‑freedom model—four‑mass vehicle and four‑mass hinged‑beam occupant—incorporating actual highway roughness to analyze seat characteristics, posture stability, and engine shake effects. Simulated results closely matched experimental measurements.
Vehicle movement may critically influence ride comfort, so reliable analysis and simulation systems are needed in the design of a vehicle-occupant system. In order to predict the performance of a vehicle-occupant system, it is necessary to consider the vehicle and the occupant as a dynamically coupled oscillation. This paper is concerned with theoretical analysis and verification of the simulation system of vehicle-occupant dynamic interaction. The mathematical model has twelve degrees of freedom : a vehicle model with four masses is six degrees of freedom, and an occupant model with four masses, the hinged beam model, six degrees of freedom. The random roughness of an actual highway surface has been taken into account in the simulation system. Simulated results almost agreed with experimental values. This simulation system can be used as a tool to investigate the effects of physical variables that influence automobile seat ride comfort. The effects of seat characteristics, stable posture of seat system for passengers, and engine shake on human dynamic behavior can be investigated.
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