springs

Hello, I'm wanting to experiment with springs in kangaroo. The manual happens to briefly discuss this, and even mentions Hook's law.

So, where are the spring components?

This should be more straight forward.

Replies to This Discussion

Permalink Reply by Daniel Piker on May 20, 2015 at 2:14pm

If you are using 0.099, the spring component is called SpringsFromLine and has a picture of a coil spring as an icon.

In 2.0 onwards, this is replaced by the Length goal, which is a linearly elastic 1D finite element following Hooke's law.

Permalink Reply by Arthur Lara on May 23, 2015 at 6:31am

Daniel

Please, look if I did the correct way...a comparation with sprigs force and length with the same curve...One is blue and the other is read (negative). I use the old Kangaroo with the new.

Thanx

Attachments:

curves_springs_length.JPG, 145 KB
curves_springs_length.gh, 17 KB

Permalink Reply by Daniel Piker on May 25, 2015 at 11:45am

Hi Art Agent,

Yes - everything looks good here, nice comparison.

By the way - the reason for the slight difference between the results is due to the anchors in Kangaroo2 being treated as goals with a default weighting of 1000. If you do want to fix the anchors absolutely, you can set their weights to 1e+99

Permalink Reply by Erik Lander on May 25, 2015 at 6:45pm

Looks more complex than I would imagine. How would I utilize this with a coil spring?

Permalink Reply by Erik Lander on May 25, 2015 at 8:10pm

I'm not sure how your file functions. Can we derive something simple with a coil spring?

Permalink Reply by Erik Lander on May 20, 2015 at 7:06pm

I'm using version 2.02.

I do see: "length(line)", and "plastic length". I'm still learning the terminology quite a bit. I'm assuming these are kangaroo components under the goals section?

I will play around with these to see if I can make sense of it.

Thank you Daniel. I'm thrilled to begin learning these new tools/plugins.

Permalink Reply by Arthur Lara on June 4, 2015 at 4:46am

Erik

I find one tutorial that is good for you to understand Spring Force...

It is only point, lines and data...

http://designreform.net/learning/2012/08/19/kangaroo-spring-force

I´ll do a Foucault Pendulum...and I was studied these ...spring + gravity

I´m in a cool workshop in Rio and everybody is using Kangaroo and Grasshopper

https://www.facebook.com/laboratoriodemodelos3d

Permalink Reply by Erik Lander on June 11, 2015 at 3:18pm

Hey! Cool video! Thanks! I'm going to be studying it very closely. Thank you Art Agent :)

Permalink Reply by Erik Lander on June 12, 2015 at 5:06pm

Hello, I've studied that video very much. I'm very grateful for it. I've been able to move forward with a functional file, and would like to share my current permutation, here.

Enjoy!

Attachments: