Dynamic

Implicit Dynamics System

The implicit dynamics system uses displacement as the primary variable.

Syntax

step dynamic (1) (2)
step implicitdynamic (1) (2)
# (1) int, unique step tag
# (2) double, step size

Remarks

1. Displacement control solver MPDC is automatically enabled if a displacement load is active.

2. The Newmark is automatically enabled if there is no valid integrator defined.

Explicit Dynamics System

The explicit dynamics system uses acceleration as the primary variable.

All displacement based loads/constraints cannot be not applied.

Syntax

step explicitdynamic (1) (2)
# (1) int, unique step tag
# (2) double, step size

Remarks

1. The Tchamwa with spectral radius of $0.8$ is automatically enabled if there is no valid integrator defined.