XANSYS Message: 4249 [Go back to message list]
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Subject: Re: To apply Load and then Unload
Author: Wei Wu wei.wu@
Date: 1999-08-25 23:16:00

Thanks for your response, Ernst. I am sorry I misunderstood BCs in the
text. I thought it means Boundary Conditions.

Wei

At 14:44 26/08/99 +1200, you wrote:
>From: "Hustedt, Ernst"

>Wei,

>DOF coupling is not a BC type loading, it's a 'geometric model feature'. You
>can tell by the fact that you can't define CEs or CPs in the SOLUTION
>module, only in PREP7. In short DOF coupling is not a load and therefore the
>equations are not written to the load step files. Make sure you select
>everything before writing the LS file (my favourite mistake).

>good luck

>ernst h.

>> -----Original Message-----
>> From: Wei Wu [mailto:wei.wu@t...]
>> Sent: Thursday, 26 August 1999 13:47
>> To: xansys@o...
>> Subject: Re: [xansys] To apply Load and then Unload

>> From: Wei Wu

>> Hi, Martin

>> I am back to my previous question.

>> I am wondering how to keep BCs for different load steps, if
>> BCs include
>> coupling equations and they change from one step to another?
>> I note the
>> *.s* files don't save the coupling equations. In your email
>> of 2 August Re:
>> [xansys] Physical Movement in an EMAG Analysis, you suggested trying a
>> series of SOLVE, but you suggested below using LSSOLVE rather than the
>> SOLVE command when you run multi-step jobs.

>> From your experience, is it possible to run a series of SOLVE for a
>> multi-step job, which includes changeable BCs? I'v started to
>> look at this,
>> ie rotating rotor meshes for a transient analysis.

>> Regards,

>> Wei

>> At 00:48 26/08/99 +0100, you wrote:
>> >From: Martin Liddle
>> >>In a nonlinear analysis (i.e. with various ANSYS parameters
>> set for nonlinear
>> >>solution) ANSYS will handle a succeeding load step as
>> starting from where
>> >>the previous one ended. In your example, load step 1
>> specifies the needed
>> >>BCs and load (applied in a step or ramped up). Your
>> definition of load
>> >>step 2 should keep the BCs but remove the load. When you
>> run multi-step
>> >>jobs use the lssolve command rather than the solve command.

>> >Just to clarify, load step 2 should set the load to zero not
>> delete it.

>> >Martin Liddle, Tynemouth Computer Services, 27 Garforth Close,
>> >Cramlington, Northumberland, England, NE23 6EW.
>> >Phone: 01670-712624. Fax: 01670-717324.

Posts possibly associated with message #4249AuthorDateScore
4215To apply Load and then UnloadAman Ahmed BOLAR bolar@1999/08/25 
4230Re: To apply Load and then UnloadDanny Levine1999/08/25 
4242Re: To apply Load and then UnloadMartin Liddle1999/08/25 
4244Re: To apply Load and then UnloadWei Wu wei.wu@1999/08/25 
4248Re: To apply Load and then UnloadErnst Hustedt1999/08/25 
4249Re: To apply Load and then UnloadWei Wu wei.wu@1999/08/25 
4250Re: To apply Load and then UnloadErnst Hustedt1999/08/26 
4256Re: To apply Load and then UnloadDan Militaru danielm@1999/08/26 
4260Re: To apply Load and then UnloadMartin Liddle1999/08/26 
4262Re: To apply Load and then UnloadWei Wu wei.wu@1999/08/26 
4290Re: To apply Load and then UnloadBill Bulat1999/08/27 
4291Re: To apply Load and then UnloadBill Bulat1999/08/27 
4292Re: To apply Load and then UnloadBill Bulat1999/08/27 
4302Re: To apply Load and then UnloadErnst Hustedt1999/08/30 
4317Re: To apply Load and then UnloadBill Bulat1999/08/30