"Length unloaded. Rate of Compression in pounds per inch. Length Under Load", there's one redundant parameter here; At least they are interactive, as long as the elasticity limits are not exceeded.The parameters available are Length unloaded. Rate of Compression in pounds per inch. Length Under Load. OD, ID and Wire Diameter.
If "shut length" is not spec'd, use number of turns x wire diameterhow do I know the spring won’t compress so the coils touch each other and ‘bottom out’ with the specified amount of compression?
sounds like math (algebra).Does anyone here know how to spec a spring? Say I want a spring that has 2” static compression under a 1 lb load. I also want the spring to be 3” long when under load?
For TMI, beware that Hooke's law is significantly inaccurate for helicoidal springs when the pitch changes under strain.Hookes law.
"Too Much Information", internet forums live in the world of TMI because everybody posts everything they know about a given subject, not just the answer to the OP's (original poster) question.What is TMI btw?
They don’t have anything called a reverb spring at McMaster so I should be okayIf your goal is sound isolation don't use a reverb spring...
JR
Right. Hopefully the resonant frequency will be less than 1Hz. That’s the point.well... a mass + spring system is also resonant.
Armed with this information I have roughly a 0% chance of getting it right. As best I can tell from manufacturer tear sheets a static compression of 2" has a resonant frequency around 1Hz. I haven't found any spring isolators with more than 2" of static compression. Using more than one equally specified spring doesn't seem to change the resonant frequency. Using 10 springs with 2" static compression has the same cutoff frequency as using 100 springs with 2" static compression. I'm flying blind like I do with Ohm's Law. I can rarely apply that correctly.Hookes law gives
F = k x delta l
Where F = the static force applied to a spring by a wieght in newtons
k = stiffness konstant of the spring in Newtons per meter
Delta l = the leghth or elongation, of which the spring has been alterd by the applied force, in meters.
The angle velocity gives
2 x pi x f = sq root(k / m)
Where f = the resonant freq of the system.
m = the mass of the system in kg.
This is equivalent to LCR circuits