Figure 112. LS-DYNA MESSAG file diagnostics for the stable time step. Instructions.

Single flap.

The LS-DYNA time step size should not exceed 0.235E-02 to avoid contact instabilities. If the step size is bigger then scale the penalty of the offending surface.This LS-DYNA output diagnostic lists the increment number, time, time step, and action (write plot file or flush buffers).The list starts with increment 0 at time 0 and ends with increment 7603 at time 30.003.The time step ranges from 5.01E-03 to 3.33E-03.All time steps exceed the stable value of 2.35E-03.

Double flap.

The LS-DYNA time step size should not exceed 0.235E-02 to avoid contact instabilities. If the step size is bigger then scale the penalty of the offending surface. This LS-DYNA output diagnostic lists the increment number, time, time step, and action (write plot file or flush buffers).The list starts with increment 0 at time 0 and ends with increment 2350 at time 9.9974.The time step ranges from 5.01E-03 to 4.19E-03.All time steps exceed the stable value of 2.35E-03.

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FHWA-HRT-05-096