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Ramp Applied Force in Stationary Study
Posted Mar 16, 2011, 2:38 p.m. EDT Materials, Studies & Solvers, Structural Mechanics 3 Replies
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Hi,
I am running a stationary study where a gravitational force is being applied to a deformable geometry that is undergoing "large deformation." The nonlinear solver is having issues, and based on previous posts in this forum, I think it is partially because a large force is being applied suddenly.
Is there a way to apply a ramping force in a stationary study where there is no time variable? The ramp function seems to ramp up the force as a function of time, so I don't understand how I can use it in a stationary study. Thank you.
Austin
I am running a stationary study where a gravitational force is being applied to a deformable geometry that is undergoing "large deformation." The nonlinear solver is having issues, and based on previous posts in this forum, I think it is partially because a large force is being applied suddenly.
Is there a way to apply a ramping force in a stationary study where there is no time variable? The ramp function seems to ramp up the force as a function of time, so I don't understand how I can use it in a stationary study. Thank you.
Austin
3 Replies Last Post Mar 16, 2011, 5:17 p.m. EDT
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Posted:
1 decade ago
Hi
run a parametric sweep (i.e. stationary continuation sweep) with Param = range(0,0.1,1) and you apply your load as F0*Param. Then the load is ramped. I use this often.
Sometimes it's better NOT to start at "0", but with a small offset such as Param = {0.001 range(0.1,0.1,1)} as sometimes the "zero case" could be a singularity or it could be a biffurcation point
--
Good luck
Ivar
run a parametric sweep (i.e. stationary continuation sweep) with Param = range(0,0.1,1) and you apply your load as F0*Param. Then the load is ramped. I use this often.
Sometimes it's better NOT to start at "0", but with a small offset such as Param = {0.001 range(0.1,0.1,1)} as sometimes the "zero case" could be a singularity or it could be a biffurcation point
--
Good luck
Ivar
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Posted:
1 decade ago
Thank you Ivar. Is this in the Study Settings, under Continuation parameter?
I really appreciate all your help!
Austin
I really appreciate all your help!
Austin
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Posted:
1 decade ago
Hi
I would say so, take a look this is for a torque load applied in steps
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Good luck
Ivar
I would say so, take a look this is for a torque load applied in steps
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Good luck
Ivar
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