Oasys LS-DYNA Environment 8.1 VOLUME 3 ... - Oasys Software

Oasys LS-DYNA Environment: User Guide (Version 8.1)
LS-DYNA Manual Section: *CONTROL_DAMPING
Example of: Cantilever Beam
Example Filenames: beam_free.key
beam_damping.key
Description:
A cantilever beam is subjected to a load at the free end. The beam then vibrates relative to the
equilibrium position without damping in case 1 and with damping in case 2.
Model:
The beam measures 1000 × 100 × 10 mm 3 and is modeled by 10 Belytschko-Tsay shell elements.
A force of 10 N is applied in the z-direction at the free end. The calculation ends at 0.5 seconds.
Input for the undamped system:
The load at the free end is applied as two point forces. The size of these forces is controlled by load
curve definition number 1 (*DEFINE_CURVE, *LOAD_NODE_SET).
Input for the damped system:
The same input as in the undamped case except for a global damping constant
(*DAMPING_GLOBAL, *CONTROL_DAMPING).
Reference:
Schweizerhof, K. and Weimer, K.
Page A.55