Displacements in a DTRAN Solution
Hi all
In a Direct Transient solution i have given a acceleration load with certain frequency and amplitude.
When icheck displacements in the location where acceleration is applied, The Displacement curve is a not oscillationg one.Instead it is keep on going.
Can any one help me in getting the oscillating displacements.
I have tried by changing all options of FORM(1) in Displacement output request.but no use.
Please help me in this .
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Could you please consider initial velocity for the base setup where you have time Vs accel.Transient initial conditions are defined using a TIC Bulk Data Entry. Initial displacements and initial velocities can be defined. This should help you to avoid drift in the displacement plot and get oscillating plot.
Sir
I really Appreciate this.
Thanks a lot for your time.
I think this is solved.
But when try to integrate the acceleration curve to get celocity i am gettion a Zero velocity. Please help me in the methodology for getting velocity.and also how did you created TIC (V).
When i go go to load type page Velocity type is Blank.
Thanks again for the support sir.
TIC V you can create from constraints panel & set the load type to TIC V.Sorry i cant provide you right now the hand calculation which we did to calculate Intial velocity, as i am away from office desk.However,I do have the math we performed in HyperGraph to crosscheck.PFA mvw file for same,
<?xml version="1.0" encoding="UTF-8"?>
Sir
I calculated Initial Velocity and applied as TIC(V).
But after the compltio of acceleration cycle displacements are cumulative.
(which mathematically may true, As Acceleration=0, Velocity which is integral of Acceleration = constant , Then Displacement is a straight line which is cumulative )
How can we make the velocity, displacement to be zero after the load (Acceleration)is removed .
Did you specify damping in your model?