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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › applying gravity and earthquake in z direction › Reply To: applying gravity and earthquake in z direction

April 18, 2024 at 4:39 pm
Ushnish Basu
Ansys Employee

You can use BOUNDARY_PRESCRIBED_MOTION with zero motion during the gravity initialization (set OFFA in DEFINE_CURVE to generate the initial zero portion automatically)

Alternatively, use BOUNDARY_SPC_BIRTH_DEATH to set a death time on the SPC