Simulation of force produced by a falling mass
Simulation of force produced by a falling mass
(OP)
Hi.
Does anyone have any suggestions how to simulate the force produced by a mass of 2,5 kg (max) falling from a hight of 20cm (max) into someones hands. We want to make some measurements in which we want to be able to change the amplitude of the force. The measurements would be held for 30 repetitions with a 2-5 second pause betwen. It is very important that we can simulate the impulse.
I was thinking about solenoids but I am affraid that it could come to overheating. Or not?
Any suggestions?
Does anyone have any suggestions how to simulate the force produced by a mass of 2,5 kg (max) falling from a hight of 20cm (max) into someones hands. We want to make some measurements in which we want to be able to change the amplitude of the force. The measurements would be held for 30 repetitions with a 2-5 second pause betwen. It is very important that we can simulate the impulse.
I was thinking about solenoids but I am affraid that it could come to overheating. Or not?
Any suggestions?





RE: Simulation of force produced by a falling mass
RE: Simulation of force produced by a falling mass
A low-mass swing arm with an actual 2.5kg mass would seem preferrable to me. There's a lot of dynamics that have to be duplicated to make any simulation match the actual reality.
Are you testing the hand or the object? If it's the object, there's much less to do to get verisimilitude.
TTFN
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RE: Simulation of force produced by a falling mass
You could get this from inelastic collision theory since you assume no mass loss or gain to that body and simply a change in direction, velocity variance.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: Simulation of force produced by a falling mass
Fdt=d)mv) and integrating you get
impulse=change of momentum
As the Tick implies you can get various F vs t values depending on the stopping mechanism.
Not sure what you are after but an accelerometer with a readout can get you that force-time history.The area under that curve is the change of momentum (mv) but in general you can't get a constant force over time.
I would start with wooden stops of various stiffness for the stop test.
RE: Simulation of force produced by a falling mass
I'm also very limited with the space the simulator should take. We tought to put it in a box of 30x30x30cm.
Thnx for everything :)
RE: Simulation of force produced by a falling mass
Basically; F=ma
Once you figure a - or de-acceleration which is based on distance and time or delta l/delta t - you got it.
That is the detail where the devil lives.....
Why do you thin Ford & Chevy and BMW, etc spend thousands of dollars crashing cars every year.
If they knew those numbers - they wouldn't wwater their time and money.
I have found that a few ACTUAL test will teach you a lot..
RE: Simulation of force produced by a falling mass
TTFN
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