Tangens hyperbolicus approximations of the spatial model of friction coupled with rolling resistance. (English) Zbl 1270.70055
Summary: For the first time, the complete set of Tangens hyperbolicus approximations of model of dry friction coupled with rolling resistance for circular contact area between interacting bodies is proposed. The developed approximations are compared with corresponding Padé approximants of the first and second order well known from the literature and with the numerical solution of the exact integral model as well. It is shown that Tangens hyperbolicus approximants are closest to the exact solution. Then the approximated models are applied to the celtic stone dynamics, however with the significant simplifying assumption of circular contact between stone and the table, presenting differences between them again. Certain specific approximations and regularizations of the friction and rolling resistance models enabling and facilitating their application to the real problem are shown. The analysis of the response dependence on initial conditions is performed by the use of a special kind of diagram.
MSC:
| 70F40 | Problems involving a system of particles with friction |
| 70E55 | Dynamics of multibody systems |
Keywords:
Coulomb-Contensou friction model; friction modeling; rolling resistance; Tangens hyperbolicus approximation; Padé approximation; wobblestone; celtReferences:
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