Consider the case where flight or test pyrotechnic source shock data has been measured on a launch vehicle with a 1-meter diameter aluminum cylindrical shell. Assume that the source device is frangible joint with a certain number of grains per length. Now the same device will be used on a new 5-meter diameter vehicle with all other variables remaining the same. The question arises as to how the 1-meter data source shock data can be extrapolated to the 5-meter diameter vehicle prior to any testing of the new vehicle’s structure.
A hypothetical method is presented in: source_shock_hypothesis.pdf
This method maintains a constant pseudo velocity at the knee frequency as the frequency is shifted for the new vehicle. Note that the knee frequency is the same as the respective ring frequency.
Experimental verification is pending, but the method is rational.
See also: pyrotechnic shock
– Tom Irvine
Vibrationdata 