Spring Positioning on a Cantilever beam
Spring Positioning on a Cantilever beam
(OP)
Hallo guy,
I hope its not asking too much, but i really need help with this, Urgently.
I have a cantilever, with point load P=100 at the end tip.
A spring(K=500) attached to the cantilever perpendicularly at UNKNOWN position.
I KNOW the deflection at the end tip. and the rest of the parameters, the only thing UNKNOWN is the POSITION where i can place this spring to generate the known deflection at the tip.
Can somebody help me formulate a formula which can help me get this position.
I will appreciate your help guyz, am really stuck on this.
I hope its well understood, if not, i can generate a drawing and attach it.
Thank you guyz.
I hope its not asking too much, but i really need help with this, Urgently.
I have a cantilever, with point load P=100 at the end tip.
A spring(K=500) attached to the cantilever perpendicularly at UNKNOWN position.
I KNOW the deflection at the end tip. and the rest of the parameters, the only thing UNKNOWN is the POSITION where i can place this spring to generate the known deflection at the tip.
Can somebody help me formulate a formula which can help me get this position.
I will appreciate your help guyz, am really stuck on this.
I hope its well understood, if not, i can generate a drawing and attach it.
Thank you guyz.






RE: Spring Positioning on a Cantilever beam
There is probably some calculus method of doing this but I see an iterative process.
Calculate deflection without spring.
Calculate the forces at points along the beam to push it to the desired position. See the force required and the deflection at the point of application. That gives you the parameters if you are designing the spring, or, pick the best fit position if it is a known spring. repeat around that spot to approach the exact fit position.
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Spring Positioning on a Cantilever beam
the Spring is a known spring of e.g K=500. if i were to lay out an iteration process, How would i go about it?...cause actually, i have to do the problem for varying thicknesses of my beam which correspond to the different spring constants.am trying to work it out in MS Excel.
I will try the force approach and see how it will move.
RE: Spring Positioning on a Cantilever beam
RE: Spring Positioning on a Cantilever beam
RE: Spring Positioning on a Cantilever beam
also i'd've thought a real problem would be more like "i can support a beam at a couple of possible places, what spring stiffness is needed to get a tip deflecction less than x"; it unusual to have a spring lying around. then there's the nugget in the 2nd post referring to tapered sections, which really compounds the problem !
RE: Spring Positioning on a Cantilever beam
http://www.eng-tips.com/viewthread.cfm?qid=333709
RE: Spring Positioning on a Cantilever beam
Regards,
Yakpol