static equivalent to a dynamic load
static equivalent to a dynamic load
(OP)
I need some help converting a load. Right now I have a dynamic load. I have mass=76.5 kg, acceleration=6g's (58.8 m/s^2) and time=0.667 s. The load is out on a cantilever and is being subjected to an impulse (there is no impact).
The setup is similar to someone on a diving board, quickly going from standing to crouching. There is deflection at the end of the diving board, but there is no impact. I do not think energy method can be applied here because, height is difficult to determine.
I know the current setup holds up under the above conditions. I want to test the setup until failure. I would like to use a pull station to isolate this part. I should be able to do this if I can turn the result of the static test into an equivalent impulse result.
I cannot remember how to convert a static load into an equivalent impulse. Can anyone point me in the right direction?
The setup is similar to someone on a diving board, quickly going from standing to crouching. There is deflection at the end of the diving board, but there is no impact. I do not think energy method can be applied here because, height is difficult to determine.
I know the current setup holds up under the above conditions. I want to test the setup until failure. I would like to use a pull station to isolate this part. I should be able to do this if I can turn the result of the static test into an equivalent impulse result.
I cannot remember how to convert a static load into an equivalent impulse. Can anyone point me in the right direction?






RE: static equivalent to a dynamic load
Dyn Amplification factor = 1 / (1-fa/Fn)
Where fa is the frequency of the equipment and Fn is the natural frequency of the cantilever beam.
RE: static equivalent to a dynamic load
if it is similar to a person quickly crouching ... isn't the person giving up potential energy (lowering their CG) ? where does that energy go ? strain energy in the diving board ??
RE: static equivalent to a dynamic load
The acceleration is not constant, but I do have the acceleration profile over time. This is a one shot test. The setup has to survive once to "pass"...
Does the accelerometer data (6g's) take in to account the fact that this is an impulse?
RE: static equivalent to a dynamic load
but you can derive impulse from acceleration ...
RE: static equivalent to a dynamic load