Simulation of engine dynamics by using MBS/FEM composite structures

The main aim in engine development is to implement new, optimized engine concepts regarding function, design space, weight and costs in very short development times. The trend towards increasing power density by means of supercharging, high speeds and downsizing leads to higher load on crank train components with a reduction of load reserves. Fail-safe design and optimization of these high-load components can be significantly promoted by the efficient use of transient simulation technologies based on MBS algorithms using elastic structures. This paper demonstrates as a primary application the dynamic analysis of an AUDI AG V8 crank train based on a run-up simulation. The aim is to demonstrate the great potential of this method by showing interesting possibilities using optimization tools (e.g. FE-Design's TOSCA) to the acoustics simulation of the complete engine-gearbox assemblies.