Envelope calculation of loads/load cases

Replies to This Discussion

Permalink Reply by RaphaelKilsdonk on February 27, 2018 at 1:12am

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.

Permalink Reply by Karamba3D on February 27, 2018 at 1:55pm

Hi Raphael,

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

Best,

Clemens

Permalink Reply by RaphaelKilsdonk on March 2, 2018 at 1:12am

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. 

Permalink Reply by Karamba3D on March 5, 2018 at 1:26am

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

Permalink Reply by RaphaelKilsdonk on March 6, 2018 at 1:41am

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:

• Shellopbedding.gh, 401 KB

Permalink Reply by Karamba3D on March 7, 2018 at 9:00am

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

Permalink Reply by RaphaelKilsdonk on March 9, 2018 at 12:59am

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

Permalink Reply by Karamba3D on March 9, 2018 at 8:21am

Hi Raphael,

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

Best,

Clemens