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zhao xiaoxiao (zhao_xiaoxiao)
Member
Username: zhao_xiaoxiao

Post Number: 4
Registered: 10-2005
Posted on Sunday, October 23, 2005 - 09:58 am:   

I want to analyze a dam constructed by stages. both the boundary and the load are varied in each stage. I want to know how to realize the whole procedure of the construction to get the deformation and stress of each stage? Thanks.
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 479
Registered: 06-2003
Posted on Monday, October 24, 2005 - 02:11 pm:   

You can use the STAGES facility (see STAGES in the Help Index) to perform a sequence of runs with different parameters or dimensions. You can then plot summary data as a function of stage or some parameter of the stages (see VERSUS).

You cannot, however, add new components to the structure between STAGES. You may only change parameters or positions. If this was your intention, you will have to include all possible components from the start, and change parameters to minimize the effect of some components on the overall solution.
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zhao xiaoxiao (zhao_xiaoxiao)
Member
Username: zhao_xiaoxiao

Post Number: 5
Registered: 10-2005
Posted on Monday, October 24, 2005 - 09:17 pm:   

Thanks. But I want to use the results of the previous stage as the initial value of the next stage. How should I do it?
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 480
Registered: 06-2003
Posted on Tuesday, October 25, 2005 - 12:55 am:   

If the domain boundaries do not change, then the result (and mesh) of each stage is by default the starting value for the next stage.

If the domain boundaries change, then the previous result must somehow be mapped onto the new shape. Absent any information how to do that, we simply restart from the INITIAL VALUES.

In order to feed back a warped result map, you will have to break the problem into several runs. TRANSFER out the results of the first stage, then define the mapping function and read the result into the next stage.
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zhao xiaoxiao (zhao_xiaoxiao)
Member
Username: zhao_xiaoxiao

Post Number: 6
Registered: 10-2005
Posted on Wednesday, October 26, 2005 - 04:57 am:   

Thank you very much. now i want to describe my problem in detail.you can see the dam in the attachment. there are three stages. after each stage's run, it can create a transfer file,then the dam will be constructed higher to the second stage. i will import the transfer file as the initial value of the lower part of the dam.at that time, how should i define the region shape?because the lower part have distoration at the first stage. can you give me some advice?
image/bmp
1.bmp (632.9 k)
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 482
Registered: 06-2003
Posted on Wednesday, October 26, 2005 - 06:11 pm:   

Do you mean that after the first stage is constructed, it sags, so that the thickness of the second stage is variable due to first stage sag? Otherwise, you could just add the second stage to the first and re-run it.

If this is a 2D model, the following should work:

Apply a name to the bounding lines, then plot an elevation of X+deformation and Y+deformation on the boundary.

Use EXPORT and FORMAT qualifiers to format the output suitable for a boundary definition in a script (See "Examples | Misc | Import_Export | Export_format.pde" for use of FORMAT).

You can manually insert this into the second run, or you can use an #include to pull the file in automatically.
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langchong (manking)
New member
Username: manking

Post Number: 1
Registered: 11-2005
Posted on Wednesday, November 09, 2005 - 09:11 am:   

good

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