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LKZ

How to draw bolt pretension in HyperGraph

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I use the Optistruct and I have the <filename>.pret file

 

When I try to input file in Hypergraph, it can not show the time to plused force curve.

 

At here my time is 1 sec and my pretension force is 6000N.

 

image.thumb.png.590e9963dc5e7a38d97c8e8763ad9584.png

 

Here is my file ↓

 

1.pret

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As an alternate option, please request OLOAD output (along with NLOUT), then you can plot the applied forces (pretension force at the SPOINT node) from h3d file.

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@Rahul R Thanks for your reply!

 

Because it doesn't show notice so I reply lately, Sorry.

 

image.png.f7be94dd55a463a6391c3f47bdbac494.png


Here I have choose my node at HyperGraph 2D.

 

And I have set the OLOAD at my fem file.

 

But when I plot in HyperGraph 2D, it doesn't show my applied pretension force at the plot.

 

image.thumb.png.ca950516532bb4b7af1ab38591960339.png

 

Here I upload my fem file.

 

OLOAD.fem

 

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You need to plot the pretension force at the SPOINT node, only then will it give the pretension force. You can get the SPOINT node id from your pret file or out file.

SPOINT.JPG

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@Rahul R Thanks to your apply!

 

I have the same picture like you. And I use the same SPOINT with you.

 

image.thumb.png.31d712794a68d7b006b051ac45df08e3.png

 

here I can get the SPONT ID from my pret file and out file it also the same.

 

Really thanks to you.

 

image.png.3fae897072a70eb936d7193bb5a2b6f5.png

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@Rahul R Sorry I have another question about if today I want to output the force of a surface.

 

Not the pretension.

 

How can I do at the H3D file in HyperGraph

 

How Can I do? Like this photo 

 

image.png.f41072129871b52de70fb7eb80e7f57f.png

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If you want to get reaction forces using OptiStruct, then please add SPCF anf GPFORCE cards from Analysis page>> Control cards>> Global output request.

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@Rahul R Thanks to your reply!

 

I have set the SPCF and GPFORCE like this

 

image.thumb.png.1b7f7f1c863a99d6b2d9e88b47e07a32.png

 

At here I can't find GPFORCE format for h3d, but when I see help it can set in h3d

image.png.f26935f35492f088312de5d5ce148b8c.png

 

image.png.8d593aa868cf79d86de364e087fb228e.png 

 

 

image.png

 

And If I choose nodes to output the values it looks strange

 

image.thumb.png.b045927311cbe7b6d326e9f9141e215c.png

 

Here I have my h3d.file and fem.file.

 

GP.h3d

 

GP.fem

 

 

 

 

 

 

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To get the forces (for specific nodes) , can you try using the FBD tool in HV. You would need to have an op2 result file to visualize the same. You could even punch out the forces as a csv file.

 

I am attaching the relevant document FYR.

Free Body Diagrams (FBD).pdf

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@Rahul R Thanks to your reply.

 

I have opened the HyperGraph2D successfully

 

At here I can't select the sum points of circle, I just can choose one node.

 

image.png.ecd79ab0eced71fcd17104d63bdca2e4.png

 

1.thumb.JPG.98bf1add2e4ff844673275d18e88cb93.JPG

 

Can I do that?

 

image.png.662629de9116326312d4a3a27ed13657.png

 

And when I choose Apply in FBD plot it can't plot.

 

image.thumb.png.190abf55b85be7e80b7b99c1edaf4692.png

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Hi @LKZ

 

Please follow the below steps.

Capture.thumb.PNG.619488977bfcec09b019896c59a35a49.PNG

With the Pick: Elements selector active, pick the elements on which you want to plot. (for example as shown in the above image). Then, add those elements to FBD section (Click +).

Assign the system to it. then pick a node where you want the forces to be plot. Then, click apply.

image.png.3595b7d9a539a97186734c60befe1171.png

Select the load case and then, you will be able to see the FBD plots. Also, you can see the values when you click on the highlighted icon.

 

Thank you

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@Premanand Suryavanshi Thanks to your reply! 

 

Because I have tried that I can output the pretension force.

 

And it can output but I can't draw it pretension with time curve.

 

Do you know where is my wrong?

 

image.png.5291f1ec74cc0933114a59e462be773b.png     image.png.3a1f0e93b0ef87487d3ff090cd1a1049.png

 

I can export my node total force and it is the same.

 

I now have the problem because my op2 result just to show the last step result.

123.png.876be739b69b5e5bdeadf4d036fde96b.png

 

It doesn't have process so how do I show the time to pretension curve.

 

Really thanks to you.

 

 

 

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