"William,
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…"
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William Franck's Discussions
Bending of a Tube with restaints at mid-height
6 Replies
Hi all,I want to analyse the behaviour of a sailboat mast. To begin with, I designed a tube, and added 2 little surfaces on Y face to be able to add limited restraints at the base of the mast and at…Continue
Started this discussion. Last reply by Michael Freytag Dec 22, 2011.
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Michael Freytag replied to William Franck's discussion 'Bending of a Tube with restaints at mid-height'
Michael Roberts replied to William Franck's discussion 'Bending of a Tube with restaints at mid-height'
"Hi William
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…"
William Franck replied to William Franck's discussion 'Bending of a Tube with restaints at mid-height'
William Franck replied to William Franck's discussion 'Bending of a Tube with restaints at mid-height'
"Thanks Michael,
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 ;-)
The counter vector should be possible on simple cases of study. In the real world - and futur…"
Michael Freytag replied to William Franck's discussion 'Bending of a Tube with restaints at mid-height'
"William,
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…"
William Franck replied to William Franck's discussion 'Bending of a Tube with restaints at mid-height'
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William Franck posted a discussion
Bending of a Tube with restaints at mid-height
Hi all,I want to analyse the behaviour of a sailboat mast. To begin with, I designed a tube, and added 2 little surfaces on Y face to be able to add limited restraints at the base of the mast and at the shrouds/stay (for now at mid-height of the mast).Base is restraint in X,Y,Z.Mid is just restraint in X.Force is X on the upper face of the tube. But bending simulation do not meet my expectations. Upper part is OK, but lower part of the tube should bend slightly in the opposite direction of the…See More
William Franck replied to Sam Lochner's discussion 'Status of multi-body support?'
"+1
Designing sailboats, I'd like to model and analyse
hull stresses (with non isotropic materials like FRP (fiberglass strands+epoxy)) with keel at some angle of heel,
mast stresses (aluminium/Carbon mast+spreaders with stainlesssteel…"
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- http://www.rover-yachts.com
- What modeling, simulation and analysis tools do you use?
- Rhino v5
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