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Improving the reliability of multibody simulation by implementing a hysteretic tyre model for radial dynamics

Futurities Year 21 n°4
By Federico Mammini, Marco Pinelli, Michele Sgamma, Francesco Bucchi, and Francesco Frendo
University of Pisa
Improving the reliability of multibody simulation by implementing a hysteretic tyre model for radial dynamics
Improving the reliability of multibody simulation by implementing a hysteretic tyre model for radial dynamics

Abstract

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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