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Miscellaneous Analysis & Methods / Re: Reading Initial Temperature from NASTRAN deck
« Last post by Brent on November 29, 2018, 09:56:51 AM »
Hi Ruben,

The reference temperatures defined on the load sets are not imported from the FEM. These values are specified by the user.

In order for HyperSizer to import the applied and initial temperature(s) defined in the FEM, the reference temperatures assigned to the HyperSizer loads sets needs to be set at room temperature (22.22222 Celsius). If there are no thermal subcases defined in the FEM, HyperSizer will not import an initial temperature "TEMPD".

Also, when more than one thermal subcase is defined in a rundeck, HyperSizer will not read the initial or applied temperatures in the FEM. Therefore, it is best practice to create unique rundecks for each thermal subcase. This way, the unique thermal case temperature dependent material properties can be updated to each FEM.

When you only need to define a single reference temperature per subcase, I recommend to modify these values for each load set in HyperSizer spreadsheet.

Hope this helps!

Brent


2
Miscellaneous Analysis & Methods / Reading Initial Temperature from NASTRAN deck
« Last post by Ruben on November 29, 2018, 06:56:56 AM »
Hello,

I'm trying to set the initial temperature in HyperSizer from the NASTRAN deck on import so that a mechanical analysis is performed using material properties at that temperature to see the effects of elevated temperature, not a thermal analysis. I thought I just needed a TEMP(INIT) = 1 in the Case Control, then a TEMPD,1,100. to set the Temperature in the Load Sets tab to 100., however it just defaults to 22.22222. How do I get HyperSizer to read the temperature for material properties from the NASTRAN deck?

Regards,
Ruben
3
Analysis Plugins / Re: UDef Buckling Analysis - Buckling Span Scaling Factor
« Last post by kobye.bodjona on November 28, 2018, 09:12:50 AM »
Hi Stephen,

Thanks for your reply. We very much look forward to having access to this variable in a future release. (For now we will have to keep performing the relevant analysis using our old tool).
Best regards,

Kobye
4
Analysis Plugins / Re: UDef Buckling Analysis - Buckling Span Scaling Factor
« Last post by Stephen on November 27, 2018, 10:33:14 AM »
Hi Dr. Bodjona,

Unforunately, this data is simply not accessible through the state variable that is passed into the plugins. I cannot think of any simple way to obtain this information, unless you implement a process that computes this factor for each component before running HyperSizer and loadcase (most likely scripted through a pre-processor), then saves it as a CSV for the plugin to read. I know that is far from ideal.

I have noted this as a desired improvement for the plugin API, however. I hope we can work this into a future release.

-Stephen
5
Analysis Plugins / UDef Buckling Analysis - Buckling Span Scaling Factor
« Last post by kobye.bodjona on November 27, 2018, 07:55:47 AM »
We have an in-house buckling analysis which we would like to incorporate into our in-house HyperSizer analysis plugin.

One thing we require for this analysis is the buckling panel loads, which are readily available in the HyperSizer object.

Another thing we require--based on how HyperSizer determines the buckling panel loads--is the scaling factor by which the buckling spans are adjusted. (Otherwise, the buckling panel loads do not produce correct results when some elements in the panel are in tension).

Where in the HyperSizer object can I access the scaling factor?

Dr. K. Bodjona, Airbus Defence & Space
6
Scripting / Re: Error Message
« Last post by Ruben on November 21, 2018, 11:13:41 AM »
Thanks for the reply, I don't think I've changed anything, but it appears to be working again!
7
Miscellaneous Software Topics / Re: Analysis Details...
« Last post by Stephen on November 13, 2018, 01:48:25 PM »
Hi Sorin,

This is a known reporting issue which was recently fixed. I am reaching out via email to follow up.

Thanks,
Stephen
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Miscellaneous Software Topics / Analysis Details...
« Last post by sorinb on November 13, 2018, 01:33:36 PM »
Hi,

I am trying to verify a negative margin of safety for a solid laminate composite. When I right click on the check that shows the negative margin and to the "Analysis Details..." option, the excel files does show the margin, the allowable, and a strain (I'm checking an OHC). The strain and the allowable, however, cannot reproduce the margin.
I could reproduce the margin using the running loads and a strain calculator, and using the bottom ply strain.
Is there a way to show both top and bottom plies strains in the Analysis Details spreadsheet in order to verify the margin of safety?

Thank you,
Sorin
9
Scripting / Re: Error Message
« Last post by August on October 19, 2018, 09:04:35 AM »
Hi Ruben,

This may not necessarily be a HyperSizer-specific error. The Remote Procedure Call (RPC) referenced in the error message is a Windows-level entity that manages COM interfaces in general. It appears that the RPC on your computer may be the source of the trouble here, since the COM works fine on your colleague's computer.

There seems to be a variety of fixes on Google for RPC failures. Or you might see what your IT people can do.

Is the database local, or on a server?

Best,
-August
10
Scripting / Error Message
« Last post by Ruben on October 19, 2018, 04:13:16 AM »
Hello,

When I use the spreadsheet utility, or use the COM interface through some Python code, I get a "HyperSizer has stopped working message the first time", with the attached messages from the spreadsheet and the command line. However if I immediately run it again, it works fine. It consistently doesn't work on the first attempt for me, but for my colleague it works first time. Any ideas what might be causing this issue for me? It seems to be the OpenDatabase part of the COM interface.

Regards,
Ruben
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