Multibody simulation is integral to engineering, enabling precise analysis of structural loads and dynamic behaviours in complex systems. In the context of forklifts, where tyres play a critical role due to the absence of suspension systems, accurate tyre modelling is essential. This study develops and validates a hysteretic Bouc-Wen model for the radial dynamics of solid rubber tyres to enhance simulation reliability.
Experimental tests characterized the tyres' nonlinear and hysteretic behaviours, capturing both static and frequency-induced stiffness increases. Two models were proposed: a simpler viscoelastic spring-damper model and the Bouc-Wen model, with the latter demonstrating superior accuracy in reproducing tyre hysteresis and dynamic stiffness.
Validation was performed through multibody simulations of an obstacle-crossing test using RecurDyn software. Results showed that the Bouc-Wen model achieved a lower relative error compared to the spring-damper model, accurately predicting axle accelerations and wheel dynamics, including rebound and oscillation behaviors. The study underscores the efficacy of the Bouc-Wen model in improving forklift simulation precision, offering valuable insights for vehicle dynamics analysis.
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