Adaptive Geometric Numerical Integration of Mechanical Systems

University dissertation from Matematikcentrum

Abstract: This thesis is about structure preserving numerical integration of initial value problems, i.e., so called geometric numerical integrators. In particular, we are interested in how time-step adaptivity can be achieved in conjunction with structure preserving properties without destroying the good long time integration properties which are typical for geometric integration methods. As a specific application we consider dynamic simulations of rolling bearings and rotor dynamical problems. The work is part of a research collaboration between SKF ( and the Centre of Mathematical Sciences at Lund University.

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