All Discussions Tagged 'tensegrity' - Grasshopper2024-03-29T12:09:17Zhttps://www.grasshopper3d.com/forum/topic/listForTag?tag=tensegrity&feed=yes&xn_auth=noModal analysis of a tensegritytag:www.grasshopper3d.com,2016-10-09:2985220:Topic:16147282016-10-09T16:27:39.968ZArsènehttps://www.grasshopper3d.com/profile/Arsene
<p>Hello everyone,</p>
<p>I am trying to model the dynamic behaviour of a tensegrity submitted to seismics waves.Could you explain to me the way to apply a variable force to the structure and then, how to access to the constraints within the struts and the cables ?</p>
<p>Thank you,</p>
<p>Arsène</p>
<p></p>
<p></p>
<p>Hello everyone,</p>
<p>I am trying to model the dynamic behaviour of a tensegrity submitted to seismics waves.Could you explain to me the way to apply a variable force to the structure and then, how to access to the constraints within the struts and the cables ?</p>
<p>Thank you,</p>
<p>Arsène</p>
<p></p>
<p></p> Tensegrity + Hoopsnake + problemtag:www.grasshopper3d.com,2016-02-07:2985220:Topic:14566422016-02-07T06:35:11.559ZRizzhttps://www.grasshopper3d.com/profile/Rizz
<p>Dear friends,</p>
<p></p>
<p>I am doing a definition for a Tensegrity structure for uni and I am having problem implementing hoopsnake to iterate my 3strut unit to form an overall structure. </p>
<p></p>
<p>TOP view</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654949794?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2654949794?profile=RESIZE_1024x1024" width="500"></img></a></p>
<p></p>
<p>The definition is attached. </p>
<p>I also have a version with hoopsnake but I could not make it work. </p>
<p></p>
<p>So I am…</p>
<p>Dear friends,</p>
<p></p>
<p>I am doing a definition for a Tensegrity structure for uni and I am having problem implementing hoopsnake to iterate my 3strut unit to form an overall structure. </p>
<p></p>
<p>TOP view</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654949794?profile=original" target="_self"><img width="500" src="http://storage.ning.com/topology/rest/1.0/file/get/2654949794?profile=RESIZE_1024x1024" width="500" class="align-full"/></a></p>
<p></p>
<p>The definition is attached. </p>
<p>I also have a version with hoopsnake but I could not make it work. </p>
<p></p>
<p>So I am using clusters to feed the loops to generate the above pattern.</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654950065?profile=original" target="_self"><img width="500" src="http://storage.ning.com/topology/rest/1.0/file/get/2654950065?profile=RESIZE_1024x1024" width="500" class="align-full"/></a></p>
<p>Can someone help me to adjust the above definition to use hoopsnake to loop instead of using the clusters. </p>
<p></p>
<p>One of the challenges I had was selecting different list items everytime the loops progresses. If you see inside the clusters I used CASE statement using C# to generate 3 different scenario for the selection however when I include into the loops it doesnt work very well. </p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654950172?profile=original" target="_self"><img width="500" src="http://storage.ning.com/topology/rest/1.0/file/get/2654950172?profile=RESIZE_1024x1024" width="500" class="align-full"/></a></p>
<p></p>
<p>If someone can see the logic in my definition using the cluster and suggest a way to implement using hoopsnake, I would be very much appreciate the assistance.</p> Minimal Surface / Mesh Relax - Volumetric Tensegritytag:www.grasshopper3d.com,2015-04-22:2985220:Topic:12706702015-04-22T21:33:49.673ZPaul Thorpehttps://www.grasshopper3d.com/profile/PaulThorpe
<p>Hi all,</p>
<p></p>
<p>I have been undertaking research into the possibilities of volumetric tensegrity and currently find myself at a bit of a cross roads in how to compute the membrane. I am hoping to create a surface similar to the seminar pod you see below:</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654902883?profile=original" target="_self"><img class="align-full" height="241" src="http://storage.ning.com/topology/rest/1.0/file/get/2654902883?profile=RESIZE_1024x1024" width="560"></img></a></p>
<p></p>
<p>As you can see from the models, I did have a degree of success by using starlings…</p>
<p>Hi all,</p>
<p></p>
<p>I have been undertaking research into the possibilities of volumetric tensegrity and currently find myself at a bit of a cross roads in how to compute the membrane. I am hoping to create a surface similar to the seminar pod you see below:</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654902883?profile=original" target="_self"><img width="750" src="http://storage.ning.com/topology/rest/1.0/file/get/2654902883?profile=RESIZE_1024x1024" width="560" class="align-full" height="241"/></a></p>
<p></p>
<p>As you can see from the models, I did have a degree of success by using starlings Fast Mesh, however when I adjust the scales and complexity of the strut organisation it produces indifferent results.</p>
<p></p>
<p>What I am now attempting is to create the volume mesh using Ball Pivot and then applying mesh union between that and the piped struts before using a mesh relax, using the ends of the struts as anchor points. </p>
<p></p>
<p>For some reason however, I am having trouble with the union of meshes and it will not create one mesh.</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654902993?profile=original" target="_self"><img width="750" src="http://storage.ning.com/topology/rest/1.0/file/get/2654902993?profile=RESIZE_1024x1024" width="542" class="align-full" height="175"/></a></p>
<p></p>
<p>I am unsure as to whether this is the best or most economical way to generate the surface. I have seen a lot of minimal surface and mesh subdivision examples but none of which seem to apply as well as this should.</p>
<p></p>
<p>If anyone has a solution / alternative method to achieve this I would appreciate it immensely. </p>
<p></p>
<p>Thank you kindly in advance,</p>
<p></p>
<p>Paul</p> rolling a robot: kangaroo, firefly, arduino, tensegrity structuretag:www.grasshopper3d.com,2015-03-04:2985220:Topic:12367472015-03-04T20:25:53.408Zian mannhttps://www.grasshopper3d.com/profile/ianmann
<p>hi all,</p>
<p></p>
<p>Im trying to simulate a tensegrity robot. I want to basically set it up to walk to a roaming point (perhaps a person, or another robot) on its own.</p>
<p>I have tried to use nearest point to activate the vertices that should "roll", this will be achieved by overbalancing the robot and turning on electromagnets (i am just prototyping with a metal sheet as the floor to try to simplify this at this stage). </p>
<p></p>
<p>So my main issue that i am having at this stage…</p>
<p>hi all,</p>
<p></p>
<p>Im trying to simulate a tensegrity robot. I want to basically set it up to walk to a roaming point (perhaps a person, or another robot) on its own.</p>
<p>I have tried to use nearest point to activate the vertices that should "roll", this will be achieved by overbalancing the robot and turning on electromagnets (i am just prototyping with a metal sheet as the floor to try to simplify this at this stage). </p>
<p></p>
<p>So my main issue that i am having at this stage is to "update" load points in kangaroo. when i change which point should roll, it fails kangaroo. </p>
<p></p>
<p>I also tried running through hoopsnake but no luck there...</p>
<p></p>
<p>if anyone has any suggestions or recommendations, please let me know!</p>
<p></p>
<p>thanks,</p>
<p></p>
<p>Harry</p>
<p></p>
<p>(FYI - the first file is the more simple, without extending the struts, the second is with extending the struts but completely fails in kangaroo, so it will just be for records rather than commanding the arduino)</p> Kangaroo Tensegrity Model - Animation breaking uptag:www.grasshopper3d.com,2014-08-12:2985220:Topic:11155692014-08-12T16:49:03.785ZMartyna Marciniakhttps://www.grasshopper3d.com/profile/MartynaMarciniak
<p>Hi all,</p>
<p></p>
<p>I am currently testing possibility of transforming Kelvin Cell into a tensegrity structure. I have been using the definition for tensegrity simulations found on the forum in previous discussions, e.g.:</p>
<p></p>
<p></p>
<p><a href="http://www.grasshopper3d.com/group/kangaroo/forum/topics/tensegrity-structures">http://www.grasshopper3d.com/group/kangaroo/forum/topics/tensegrity-structures</a></p>
<p></p>
<p>(file name:kelvin cell)</p>
<p></p>
<p>Everything seems to be…</p>
<p>Hi all,</p>
<p></p>
<p>I am currently testing possibility of transforming Kelvin Cell into a tensegrity structure. I have been using the definition for tensegrity simulations found on the forum in previous discussions, e.g.:</p>
<p></p>
<p></p>
<p><a href="http://www.grasshopper3d.com/group/kangaroo/forum/topics/tensegrity-structures">http://www.grasshopper3d.com/group/kangaroo/forum/topics/tensegrity-structures</a></p>
<p></p>
<p>(file name:kelvin cell)</p>
<p></p>
<p>Everything seems to be working fine, however when I start the animation, as soon as the model 'hits' the floor it disappears (also everything from rhino model gets erased).</p>
<p></p>
<p>in the other grashopper definition that I tried (file name: kelvin cell 2)</p>
<p></p>
<p>the tensigrity itself is not working. </p>
<p>I wonder why and what the logic behind this behaviour is...</p>
<p></p>
<p>As I am relatively new at grasshopper and kangaroo I would greatly appreciate any help or suggestions.</p>
<p></p>
<p>Files attached below;)</p> Reverse Triangular Pattern Directiontag:www.grasshopper3d.com,2014-06-02:2985220:Topic:10815932014-06-02T01:41:02.297ZSteven T. Putthttps://www.grasshopper3d.com/profile/StevenTPutt
<p>Could someone suggest a way I can reverse the direction of the triangular pattern along the surface?…</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654856529?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2654856529?profile=RESIZE_1024x1024" width="750"></img></a></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654856833?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2654856833?profile=RESIZE_1024x1024" width="750"></img></a></p>
<p>Could someone suggest a way I can reverse the direction of the triangular pattern along the surface?</p>
<p></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654856529?profile=original" target="_self"><img width="750" src="http://storage.ning.com/topology/rest/1.0/file/get/2654856529?profile=RESIZE_1024x1024" width="750" class="align-full"/></a></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654856833?profile=original" target="_self"><img width="750" src="http://storage.ning.com/topology/rest/1.0/file/get/2654856833?profile=RESIZE_1024x1024" width="750" class="align-full"/></a></p> Sierpinski Triangle Pattern Along Surfacetag:www.grasshopper3d.com,2014-05-29:2985220:Topic:10802722014-05-29T17:11:24.247ZSteven T. Putthttps://www.grasshopper3d.com/profile/StevenTPutt
<p>Hello,</p>
<p></p>
<p>I'm trying to discover how I can create a Sierpinski Triangle pattern along any given surface. The importance of the pattern is that you could select triangles that do not touch vertices to vertices, but rather vertices to center of edge. </p>
<p></p>
<p>This would allow me to begin trying to create a tensegrity model from any surface. My first attempts started with Lunchbox because of how easily it allows you to panel any surface, but haven't got much further since.…</p>
<p>Hello,</p>
<p></p>
<p>I'm trying to discover how I can create a Sierpinski Triangle pattern along any given surface. The importance of the pattern is that you could select triangles that do not touch vertices to vertices, but rather vertices to center of edge. </p>
<p></p>
<p>This would allow me to begin trying to create a tensegrity model from any surface. My first attempts started with Lunchbox because of how easily it allows you to panel any surface, but haven't got much further since. I'm imagining it will take some manipulation of data tree structures, but I am not very familiar with doing such things. </p>
<p></p>
<p>Thanks for your help!</p>
<p></p>
<p>Steven</p> Kangaroo_tesegrity structure: elongation and straintag:www.grasshopper3d.com,2013-11-07:2985220:Topic:9535142013-11-07T10:34:17.739ZJonhttps://www.grasshopper3d.com/profile/Frank683
<p> </p>
<p>Hallo Daniel,</p>
<p>I have tried the tensegrity-structure example file and noticed the struts getting shorter; I know theoretically it somehow happen to compression parts. But the strain about 30 cm doesn’t look realistic!</p>
<p>(To get 1 mm deformation from a solid steel volume (1 cm x 1cm x 1 meter) we need almost 2100 KN.)</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654822755?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2654822755?profile=RESIZE_1024x1024" width="750"></img></a> </p>
<p>I was…</p>
<p> </p>
<p>Hallo Daniel,</p>
<p>I have tried the tensegrity-structure example file and noticed the struts getting shorter; I know theoretically it somehow happen to compression parts. But the strain about 30 cm doesn’t look realistic!</p>
<p>(To get 1 mm deformation from a solid steel volume (1 cm x 1cm x 1 meter) we need almost 2100 KN.)</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654822755?profile=original" target="_self"><img width="750" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2654822755?profile=RESIZE_1024x1024" width="750"/></a> </p>
<p>I was thinking it could be caused by stiffness, so I put higher stiffness for struts in order to minimum its strain, but by 16.000 units the whole structure 'explored'!</p>
<p>Even I tried to vary the stiffness of struts and make it 5-10 times than cables, the strain on struts are still there.</p>
<p>But as I said, the deformation is still too much and not realistic...</p>
<p>So here are the questions:</p>
<p>- What dose those units for stiffness and 'gravity' really means? And:</p>
<p>- How we simulate a forced element (in my case struts) to obtain the realistic strain?</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2654822909?profile=original" target="_self"><img width="750" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2654822909?profile=RESIZE_1024x1024" width="750"/></a></p>
<p> </p> how to flow 3d objects onto a surface? URGENT HELP!tag:www.grasshopper3d.com,2011-06-16:2985220:Topic:2844362011-06-16T15:14:03.712ZDalia Khalilhttps://www.grasshopper3d.com/profile/DaliaKhalil
<p>Hi,</p>
<p> </p>
<p>Please help - I am not very familiar with grasshopper but I have an assignment due in the morning and have been trying for weeks. I have a series of 3d objects that are connected with curves (3d tensegrity) and would like to lay them onto a curved surface.</p>
<p> </p>
<p>I have tried 'flow along srf' in rhino and had no luck, I have attached a screenshot of what happens. Is there any way of doing this in grasshopper in a way that will not distort the objects? I am not…</p>
<p>Hi,</p>
<p> </p>
<p>Please help - I am not very familiar with grasshopper but I have an assignment due in the morning and have been trying for weeks. I have a series of 3d objects that are connected with curves (3d tensegrity) and would like to lay them onto a curved surface.</p>
<p> </p>
<p>I have tried 'flow along srf' in rhino and had no luck, I have attached a screenshot of what happens. Is there any way of doing this in grasshopper in a way that will not distort the objects? I am not even fussed about getting it perfect, as long as it sort of does what I need it to do..</p>
<p> </p>
<p>Thanks for your help!</p>