Posted by: Anonymous
Pipe Lay - 08/31/00 11:09 AM
Can we use CAESAR II for Pipe lay
(for works during piping laying)?
Regards,
Vicente Lopez Gaona
COADE´s Dealer in Mexico
Posted by: Richard Ay
Re: Pipe Lay - 09/01/00 12:22 PM
I presume you want to evaluate the stress/strain state in the pipe during installation over un-even terrain?
Here are the steps to do this:
- Model the pipe horizontally, with continuous "+Y" supports. Each "+Y" should have a corresponding CNODE.
- Displace the CNODES in the vertical direction an amount equal to the variation in elevation, from the elevation origin.
- Run the analysis.
If you're after "strain", recall that (epsilon = sigma / elastic modulus).
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Regards,
Richard Ay (COADE, Inc.)
Posted by: Anonymous
Re: Pipe Lay - 09/04/00 11:33 AM
Sorry, in fact the works have to
do when the pipe is putting/put down
in the sea, when the pipe describes
a curve when is put down in the sea.
Posted by: Richard Ay
Re: Pipe Lay - 09/06/00 01:55 PM
No, you can't model this in CAESAR II. The pipe passes through a mandrill, which introduces some curvature. Then there is the "S" curve above the water surface.
The only way to achieve such a geometry would be to use displacements, which essentially fixes the nodes at the displaced position, which defeats the purpose of your analysis.
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Regards,
Richard Ay (COADE, Inc.)