Idea

The development of Speedyne is aimed especially for the use in drop test simulations. At the moment the product is developed exclusively for selected industrial clients. Further areas of application are absolutely possible.

Concept

In dynamic short time analysis, like for example crash and drop tests, often explicit time integration methods are used. Compared to implicit methods these generally are faster. For the simulation time step there, however, exists a critical upper boundary where the time step method turns unstable upon transgression. This time step is decisively influence by the size of the smallest element.
Because of the rising performance of current computation hardware a trend to finer meshing exist which in turn leads to a reduction of the critical time step. By increasing the mass- and volume viscosity   the critical time step can only be increased within small limits without increasing the error of the model concerning the underlying physics.
With Speedyne DYNARDO pursued a development-prioject, which raises the critical time step by a large margin and thereby significantly speeds up the Simulation. The idea is, that by modal decomposition and model reduction the critical time step can be increased while at the same time deformation modes can be accurately reproduced even when using few variables. Modal decomposition can be imprecise if the tangent-stiffness-matrix differs from the starting stiffness caused by nonlinearities within the simulation. In many applications the largest part of the nonlinearities corresponds to rigid body rotations which can be modeled separately by superposition using a MKS solver.