"other victims of invalid surfaces from split srf,
I just ran into the same problem, Spliting planar surfaces. I found that when I got the Brep edges, it had interior edges. When I baked out the edges It seems the one edge of the surface was not…"
generative modeling for Rhino
Carlo Rousseeuw's Groups
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Geometry Gym BIM
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Carlo Rousseeuw's Discussions
not printing objects that are behind a surface ?
Hi, Probably not the best place to post this question. But I have a quite large facade which i divided in different pieces. Each panel received a text dot and text tag through grasshopper. However…Continue
Started Dec 13, 2011
Invalid Surface ?
6 Replies
Hey there, I'm having a an issue with the concept invalid surfaces. I'm using a script and i need to cut up an exisiting rhino surface ( not planar) into different smaller pieces using certain…Continue
Started this discussion. Last reply by Guy Snover Apr 27.
Carlo Rousseeuw's Page
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FrankS replied to Carlo Rousseeuw's discussion Invalid Surface ?"Hi David, hi Carlo,
i ran into a case that sounds similar and attached an isolated reproduceable bug.
Choosing one specific edge of my Srf, I will constantly get an "invalid" result from the SrfSplit components. All others work fine.
I…"
Carlo Rousseeuw posted a discussionnot printing objects that are behind a surface ?
Hi, Probably not the best place to post this question. But I have a quite large facade which i divided in different pieces. Each panel received a text dot and text tag through grasshopper. However when I print a certain view text tags from another facade also get printed. Which gives a quite unclear picture. Is there an advanced setting in Rhino to compensate for this ? Without "hiding" every text tag which is in the way manually. Or is there a grasshopper way to do this ? thanks in advance. See More
David Rutten replied to Carlo Rousseeuw's discussion Invalid Surface ?"I'm not ignoring, I don't have any new information yet. This is clearly one of our bugs.
Can you post the files I need to replicate this? (and, does it also happen in Rhino5?)
--
David Rutten
david@mcneel.com
Poprad, Slovakia"
Carlo Rousseeuw replied to Carlo Rousseeuw's discussion Invalid Surface ?"Hi again,
This seems to be the problem:
Surface: ON_BREP.m_T[2].m type = ON_BrepTrim::seam but m_iso is not N/E/W/S_iso.
thank in advance"
David Rutten replied to Carlo Rousseeuw's discussion Invalid Surface ?"Hi Carlo,
there's all kinds of things that could make a surface (especially a brep) invalid. If you feed the invalid object into the [Null] component, it will tell you why the shape is invalid. It's probably going to be a bit…"
Carlo Rousseeuw posted a discussionInvalid Surface ?
Hey there, I'm having a an issue with the concept invalid surfaces. I'm using a script and i need to cut up an exisiting rhino surface ( not planar) into different smaller pieces using certain parameters. However using Surface Split component I sometimes keep getting and "invalid surface". And I cannot cut up this "invalid surface". Any pointers on how to get a normal surface, or even what this error means ? Thanks in advance. See More
Andrea Fiore replied to Carlo Rousseeuw's discussion To high spring stiffness causes model to "explode" in the group Kangaroo"Hi Carlo.
I'm very intersted in your work, I also find very useful your method to define stiffness values.
Did you make the kinematic test?
Is Kangoroo approximation acceptable?
Thanks
Andrea
"
Lio replied to Carlo Rousseeuw's discussion To high spring stiffness causes model to "explode" in the group Kangaroo"Hey Carlo,
I'm intersted in seeing your tests too. When you'll have a chance, please share your results!
Thanks to you and Daniel
Lio"
Carlo Rousseeuw replied to Carlo Rousseeuw's discussion To high spring stiffness causes model to "explode" in the group Kangaroo"Hey, thanks for the info the model works now.
I'm just defining one imaginary 2D truss and comparing the displcaments.
This on the simple model, but also an actuated version to check if the kinematics are also approximated in a proper…"
Daniel Piker replied to Carlo Rousseeuw's discussion To high spring stiffness causes model to "explode" in the group Kangaroo"Hi Carlo,
Great to hear you are doing some testing and comparisons with ANSYS - this is something I've been wanting to do for some time.
You are quite right to use A*E/L as the stiffness.
The simulation 'exploding' is an…"
Carlo Rousseeuw added a discussion to the group Kangaroo
To high spring stiffness causes model to "explode"
Hey, I'm trying to observe and compare kangaroo to ANSYS (FE method) in a small example in my work.I'm well known to the compatible unit systems (m - N - Pa) (mm - N - Mpa) etc.I presume spring stiffness can be chosen as A*E/L if I want to model a beam. (L = total length, A = cross section, E = 200GPa steel)However the model will "explode" during the simulation if I change the stiffness higher than 6000 +/-.Is this a kangaroo problem or is the structure too stiff above that number, and thus a…See More
Carlo Rousseeuw commented on karamba's blog post karamba - parametric structural analysis"
Thanks for the reply and information, however it is a 2D truss with the loads in the 2D plane, so normally it should be able to be analyzed as a truss ? When I calculate the eigenmodes they don't show up or don't exist, so i quess…"
Carlo Rousseeuw commented on karamba's blog post karamba - parametric structural analysis"Wonderfull tool !
I'm trying to analyse a truss though:
If I adjust the boolean to False for "Beam Bending". The model doesn't analyze anymore. What am I doing wrong here ?
And is there a way to get the stresses or strains…"
Carlo Rousseeuw replied to Carlo Rousseeuw's discussion Rolling Guides, how to model ? in the group Kangaroo"Allrighty then !
can't wait, keep up the good work
discussion closed ( or if someone finds a good approximate approach, feel free to speak up)"
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