RD-E: 1600 Dummy Positioning

The problem of a dummy positioning on the seat before a crash analysis is the quasi-static loading which can be resolved by either Radioss explicit or Radioss implicit solvers.

If deformation remains small, a linear analysis may be used as a simple approach to determine the position after applying gravity force. However, this method is not valid if the contact surface between the dummy and the seat is not correctly estimated before analysis. When comparing the implicit and explicit solvers, it's shown that the implicit computation enables saving time in the computation. However, the rigid body modes of the dummy must be controlled. This is not the case if the explicit solver is used.

Figure 1.