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RE: Dynamic analysis of Table top foundation

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OK, I'll bite. ANSYS is a Swiss Army Knife-type general purpose program. If 
you can't find a purpose-built alternative you can use it for a wide range 
of applications.

You can find an account of using ANSYS for a compressor foundation here:

LS-DYNA is a whole other story. Even if the 600hz frequencies extracted in 
the above link were significant, thats really slow for DYNA. You can make 
DYNA do quasi-static problems (not that 600hz is), but it is a real fight 
to get a set of initial conditions that don't lead to silly answers. With 
an explicit dynamics program, you can almost always get an answer, but you 
can't always get a sensible one. STRUDL,  SAP,  ANSYS, NISA , STAAD and 
other implicit FEA solvers work similar to one another. But the tricks and 
techniques that are transferable between them are not necessarily 
transferable to explicit solvers like LS-DYNA and ABAQUS Explicit.

       Chuck Ritter
      JAR Associates, Inc

On 10/17/05, Christopher Wright <chrisw(--nospam--at)> wrote:
> On Oct 17, 2005, at 9:03 AM, Bhavin Shah wrote:
> > I would like to request you all to discuss softwares such as GT STRUDL,
> > DYNA, SACS, ANSYS, RISA, SAP2000  STAAD, NISA etc. for dynamic
> > analysis of Table Top Foundation. Also, discuss manual methods you are
> > using.
> Do you have a budget for this? You're looking at enough labor hours
> (particularly the 'etc.') to keep us all busy for a couple of weeks.
> Try asking a real question--it sounds like you're fishing.
> Christopher Wright P.E. |"They couldn't hit an elephant at
> chrisw(--nospam--at)   | this distance" (last words of Gen.
> .......................................| John Sedgwick, Spotsylvania
> 1864)

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