Grasshopper

algorithmic modeling for Rhino

Hi guys,

I have a question regarding the calculation of the model. Is it possible to calculate the envelope of multiple load cases? 

If i have a load that has 7 positions over a surface (see picture below). How can i calculate the envelope and not the combined load calculation?

Cheers,

Raphael

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Replies to This Discussion

I found a way by making a seperate model for each load and determining the highest vector of all the resulting forces. This is however not ideal. I'm curious if there is a better way of doing it.

Hi Raphael,

you could attribute each load to a different load-case.

Best,

Clemens

Hi Clemens,

Thanks for your response. If i do that i still need to apply my method for calculating the envelope right? Sorry i'm quite new to Karamba. 

Yes, you would have to calculate the envelope if you want to know the extreme cross section forces. In case of the cross section optimization algorithm or the determination of the NII-forces for second order theory this is already done internally.

Best,

Clemens

Thanks that clarifies it for me. I have another question regarding the extraction and visualisation of the results. I want to display the moments in x and y direction on a shell. But when i use the 'ShellVecResults' Node the directions sometimes flip for some reason. As seen in the picture below. I'm not sure if there is any other way of extracting the x and y moments. I attached my grasshopper file too.

Cheers,

Raphael

Attachments:

The direction vectors of the principal moments define only the tangents to the principal moment lines. This is the reason why they switch directions.

Use the 'Shell-Forces'-component with 'Result Type' set to local to get the numerical values with respect to the local element coordinate systems.

With the 'Orientate Element'-component you can set the local coordinate systems for a given shell. For the latter you need Karamba 1.3.0.

Best,

Clemens

Hi Clemens, i'm not sure how to set the 'Result Type' to local. Is this a Karamba 1.3.0 function aswell? 

I can't find the 1.3.0 version of karamba on the website. I have a student license, is it only for pro users?

Cheers,

Raphael

Hi Raphael,

no, version 1.3.0. will be public in the next few days.

Best,

Clemens

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