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Subject: Re: STRUC-Substructuring for Transient
Author: Tom Davis
Date: 2002-05-22 14:40:00

Stan,

I am trying to do a Full transient. I only brought up the M because it is
mentioned together with the D command in the sample input in section 5.3 of
the manual. It is the D command that I am concerned about. If I can use
IC instead, I would no longer be concerned about changing D between
loadsteps. I do need Masters though for the superelement part of this
problem.

I'm using ANSYS version 5.6.1.

Thanks.

TWD

Thomas W. Davis, P. E.
FSI International (http://www.fsi-intl.com/)
3455 Lyman Boulevard
Mail Station 4-1035
Chaska, Minnesota 55318
PHONE 952-361-7359, FAX 952-361-7393
tom.davis@f...

|---------+---------------------------->
| | "Schwantes, Stan"|
| | | | TK.COM> |

| | 05/22/02 12:48 PM|

|---------+---------------------------->

| To: "'xansys@yahoogroups.com'"

| cc:

| Subject: RE: [xansys] STRUC-Substructuring for Transient

Tom
Which type of transient analysis are you trying? Full, reduced or modal
superposition.
Since you mention the M command, I guess you are trying to do reduced.
Can you used full transient? Then you can get initial velocities without
using the IC command.

Regards
Stan Schwantes
Alliant Integrated Defense Company LLC
Plymouth, MN 55442
763/744-5132

-----Original Message-----
Sent: Wednesday, May 22, 2002 11:14 AM
To: xansys@yahoogroups.com

I am trying to do a transient analysis with substructuring. There are two
load steps. The first load step is strictly for applying an initial
velocity which I do with D and TIME commands. As per the manual, I have to
DDELE the displacements from the first load step when I start the second
load step. HOWEVER, there is a small note in an example problem in section
5.3 of the manual that says D and M may not change between load steps.

So, how can I apply an initial velocity and then move to my second load
step without changing D? The manual also talks about using IC to specify
initial velocity. I'm not sure I understand how to do this. Do I use the
"value2" field to specify velocity? If so, could I then use IC and skip
the first load step?

Any and all suggestions appreciated.

Thanks.

TWD

Thomas W. Davis, P. E.
FSI International (http://www.fsi-intl.com/)
3455 Lyman Boulevard
Mail Station 4-1035
Chaska, Minnesota 55318
PHONE 952-361-7359, FAX 952-361-7393
tom.davis@f...

Posts possibly associated with message #37963AuthorDateScore
37948STRUC-Substructuring for TransientTom Davis2002/05/22 
37959Re: STRUC-Substructuring for TransientStan Schwantes2002/05/22 
37963Re: STRUC-Substructuring for TransientTom Davis2002/05/22 
37968Re: STRUC-Substructuring for TransientSheldon Imaoka2002/05/22 
37969Re: STRUC-Substructuring for TransientTom Davis2002/05/22