Bending of a Tube with restaints at mid-height - Scan-and-Solve for Rhino2024-03-29T08:03:25Zhttp://www.scan-and-solve.com/forum/topics/bending-of-a-tube-with-restaints-at-mid-height?feed=yes&xn_auth=noWilliam,
With Version 1.4, yo…tag:www.scan-and-solve.com,2011-12-22:6083097:Comment:278802011-12-22T19:13:16.228ZMichael Freytaghttp://www.scan-and-solve.com/profile/MichaelFreytag
<p>William,</p>
<p>With Version 1.4, you might try inserting a linear edge (edge of a small block unioned with the mast) mid-mast and restrain this edge in X. The restrained edge will allow rotation about its length as you were trying to do with the small face.</p>
<p>~Michael</p>
<p>William,</p>
<p>With Version 1.4, you might try inserting a linear edge (edge of a small block unioned with the mast) mid-mast and restrain this edge in X. The restrained edge will allow rotation about its length as you were trying to do with the small face.</p>
<p>~Michael</p> Hi William
I am working on…tag:www.scan-and-solve.com,2011-12-21:6083097:Comment:278692011-12-21T23:38:46.185ZMichael Robertshttp://www.scan-and-solve.com/profile/MichaelRoberts
<p>Hi William</p>
<p> </p>
<p>I am working on a similar problem: a 20m prototype wing mast for a catamaran I am building. I tilted the mast back 1.189 degrees so that a vertical line from the shroud attachment point (a single bracket on the front of the mast 17 m up) goes through the centre of the base plate. </p>
<p>There is a lot of huffing and puffing from my laptop, will let you know when I get a nice picture.</p>
<p> </p>
<p>Michael</p>
<p>Hi William</p>
<p> </p>
<p>I am working on a similar problem: a 20m prototype wing mast for a catamaran I am building. I tilted the mast back 1.189 degrees so that a vertical line from the shroud attachment point (a single bracket on the front of the mast 17 m up) goes through the centre of the base plate. </p>
<p>There is a lot of huffing and puffing from my laptop, will let you know when I get a nice picture.</p>
<p> </p>
<p>Michael</p> Some results ...
I still have…tag:www.scan-and-solve.com,2011-11-14:6083097:Comment:256022011-11-14T19:20:35.193ZWilliam Franckhttp://www.scan-and-solve.com/profile/WilliamFranck
<p>Some results ...</p>
<p>I still have to do some improvements to "free" the base of the mast a bit (for now bottom is XYZ constraint), as for the bridge example.</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2506643304?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/2506643304?profile=original" width="283" class="align-full"/></a></p>
<p>Some results ...</p>
<p>I still have to do some improvements to "free" the base of the mast a bit (for now bottom is XYZ constraint), as for the bridge example.</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2506643304?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/2506643304?profile=original" width="283" class="align-full"/></a></p> Thanks Michael,
I even tried…tag:www.scan-and-solve.com,2011-11-14:6083097:Comment:254152011-11-14T18:24:45.043ZWilliam Franckhttp://www.scan-and-solve.com/profile/WilliamFranck
<p>Thanks Michael,</p>
<p>I even tried to put the small restraint on the _side_ of mid-mast - as to put a possible rotation point. But effectively no success ;-)</p>
<p>The counter vector should be possible on simple cases of study. In the real world - and futur analysises - I'd put some "wires" (stays, shrouds) to maintain the mid-mast.</p>
<p> </p>
<p>So i'am on hot coals waiting for the next version with multi-body parts interconnected or multi-materials ;-)</p>
<p>The best, William</p>
<p>Thanks Michael,</p>
<p>I even tried to put the small restraint on the _side_ of mid-mast - as to put a possible rotation point. But effectively no success ;-)</p>
<p>The counter vector should be possible on simple cases of study. In the real world - and futur analysises - I'd put some "wires" (stays, shrouds) to maintain the mid-mast.</p>
<p> </p>
<p>So i'am on hot coals waiting for the next version with multi-body parts interconnected or multi-materials ;-)</p>
<p>The best, William</p> William,
What is happening is…tag:www.scan-and-solve.com,2011-11-14:6083097:Comment:253332011-11-14T18:15:41.556ZMichael Freytaghttp://www.scan-and-solve.com/profile/MichaelFreytag
<p>William,</p>
<p>What is happening is the small restraint in X mid-mast also prevents bending of the mast beyond this point. This occurs because restraining this face in X also prevents its rotation (and thus bending) about the Y-axis in this neighborhood.</p>
<p>In the current version (1.3), you could instead apply a vector load (direction= {-1,0,0}) mid-mast where you currently restrain in X. This will not impose any restrictions on the bending of the mast at the mid-point. You will have…</p>
<p>William,</p>
<p>What is happening is the small restraint in X mid-mast also prevents bending of the mast beyond this point. This occurs because restraining this face in X also prevents its rotation (and thus bending) about the Y-axis in this neighborhood.</p>
<p>In the current version (1.3), you could instead apply a vector load (direction= {-1,0,0}) mid-mast where you currently restrain in X. This will not impose any restrictions on the bending of the mast at the mid-point. You will have to do a few back-of-the-envelope beam calculations to determine the proper load magnitude or experiment with a few different loads until the X-displacement mid-mast is zero.</p>
<p>Does this help?</p>
<p>~Michael</p> Some details :
tag:www.scan-and-solve.com,2011-11-12:6083097:Comment:253202011-11-12T18:49:17.958ZWilliam Franckhttp://www.scan-and-solve.com/profile/WilliamFranck
<p>Some details :…</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2506635213?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2506635213?profile=original" width="470"></img></a></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2506635303?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2506635303?profile=original" width="500"></img></a></p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2506635409?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2506635409?profile=original" width="505"></img></a></p>
<p>Some details :</p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/2506635213?profile=original"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2506635213?profile=original" width="470"/></a></p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/2506635303?profile=original"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2506635303?profile=original" width="500"/></a></p>
<p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/2506635409?profile=original"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2506635409?profile=original" width="505"/></a></p>