Air spring
Air spring
(OP)
Can anyone help on this
If I have an air spring which is subjected to a heat input from outside, or cooling, what happens to the way the air spring behaves as a damper.
Would the spring rate change ?
Would the natural frequency of the system change ?
Thanks for any help.
If I have an air spring which is subjected to a heat input from outside, or cooling, what happens to the way the air spring behaves as a damper.
Would the spring rate change ?
Would the natural frequency of the system change ?
Thanks for any help.





RE: Air spring
RE: Air spring
RE: Air spring
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That indicates that spring is dependent on volume.
What I would like to understand is whether or not spring rate depends temperature.
I guess the question would be - for a given actual volume of air and a given pressure, does the spring rate vary for different temperatures (ie different masses of air) ?
I understand that the natural frequency of the system will change if the air volume / spring rate changes.
RE: Air spring
I think you have the answer in your own question:
"the question would be - for a given actual volume of air and a given pressure...".
You say: "for a GIVEN volume AND a GIVEN pressure".
This is correct. you've got a gas law here. If you keep the same volume and you increase temperature, you won't in any way be able to keep the same pressure. If you want to keep the same pressure you won't be able to keep the same volume.
So the counter-question is: do you know for sure that the elastic constant and damping depends ONLY on volume? I personally strongly doubt about it, but I'd have to document myself better...
Regards
RE: Air spring
To clarify, for example, if I have an air spring with a physical volume of 1 cubic foot, pressure at 150 psia and temperature of 60 F, how will the behaviour differ from a different air spring with the same physical volume set at the same pressure but operating at 150 F
RE: Air spring
My recollection is that the spring rates shown in The curves of air spring catalogs I was last looking at in the last century were volume dependent.
therefore, same volume (thus pressure) = same spring rate, ~same mass, same spring rate, same resonant frequency