[overture] Re: how to compute velocity and acceleration of a body experiencing irregular motion

  • From: Bill Henshaw <henshaw@xxxxxxxx>
  • To: overture@xxxxxxxxxxxxx
  • Date: Mon, 11 May 2009 21:09:55 -0700

Hi Yongshen,

  How is your motion defined? Is it still a rigid body motion?
The DeformingBodyMotion class uses the GridEvolution class
to keep a time history of the moving grids that can be differenced
in time to get the velocity and acceleration.

Regards,
  Bill

Yongsheng Lian wrote:
Hi,

 Did anyone have similar problem before?

 Overture uses MovingGrids.C to compute the velocity and acceleration
of a moving rigid body. If the motion has a well-defined analytical
function, the velocity and acceleration can be computed analytically
and efficiently. However, if the motion is not regular, it becomes
difficult to evaluate these variables. I recall someone posted before
that we can still compute these using the deformingBodyGrids.   I need
some directions on how to implement it in the code. Any suggestion
will be appreciated.

Thanks,
 Yongsheng



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