The dynamic behaviour of a tyre tread block is described by a modularly arranged model with a high numerical efficiency. Special emphasis is laid on the interaction between structural dynamics and contact mechanics. Furthermore, the model includes the rolling process of the tyre: The tread block follows a trajectory which is obtained from the deformation of the tyre belt. The results from simulations with a single tread block provide a deeper insight into highly dynamic processes that occur in the contact patch such as tyre squeal, run-in or snap-out effects. The presented model covers the dynamics of a tyre tread block with a focus on numerical efficiency. The computational time for one passage of the contact zone on a standard personal computer is about 30 seconds including backward transformation of the reduced degrees of freedom into the original finite element degrees of freedom. The modularly arranged model considers structural effects, the local friction characteristic, the nonlinear contact stiffness and wear effects. To include the rolling contact the tread block model follows the trajectory of a steel belt. Simulations show four different phases during passage of the contact patch: run-in, sticking, sliding and snap-out. The model simulates tyre tread block squeal effects in a certain contact parameter range which result from friction induced vibrations. The model furthermore delivers the reaction forces to the fixed support which represents the coupling to the tyre belt. The results can be used in global tyre models as excitation forces from the tread blocks without modeling them. This concept allows the realistic and numerically efficient calculation of tyre dynamics.
Efficient dynamic modeling of rolling tyre tread blocks
2009
5 Seiten, 9 Bilder, 12 Quellen
Aufsatz (Konferenz)
Englisch