Displacement definition

I'm using Karamba to analyze a gridshell. The Analyze component gives me the displacements ("Maximum displacement of each loadcase of the model at end points and mid-points of elements") and the manual specifies these displacements as the "local peak values".

I'm unsure of these definitions so I made this crude drawing (attached) to get it explained.

What is the displacement in Karamba? Is it d1 or d2 in the drawing? Or something else?

I hope the question (and the drawing) makes sense.

- Lasse

Attachments:

IMG_3337.jpg, 1.3 MB

Replies to This Discussion

Permalink Reply by Karamba3D on April 5, 2018 at 1:29pm

Hi Lasse,

the displacement in Karamba3d is meassured from the initial position (like d2 in your drawing).

Best,

Clemens

Permalink Reply by Lasse Bøgel Jensen on April 8, 2018 at 2:47am

Hi Clemens

Thank you for your reply

Any ideas on how to obtain the d1 (from drawing) displacement? Where d1 is the movement of the beam compared to (the initial beam) a line between the start and end node.

Lasse

Permalink Reply by Karamba3D on April 10, 2018 at 1:09pm

Hi Lasse,

calculate the rigid body movement at the point in question by linearly interpolating the displacement of the end-points of the beam. Then subtract it from the d2.

Best,

Clemens

Permalink Reply by Lasse Bøgel Jensen on April 16, 2018 at 5:43am

Thanks Clemens! :-)

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