Obtaining Shock Pulse Input Data from Shock Response Spectrum
Obtaining Shock Pulse Input Data from Shock Response Spectrum
(OP)
I need some help determining how to convert from a Shock Response Spectrum plot back to the appropriate Shock Pulse level and duration. The customer spec. contains a four coordinate plot which I think is called a Fourier/Pseudo-Velocity Spectrum. This plot shows the "pseudo-velocity" on the vertical axis and the "frequency" on the horizontal. Ascending diagnals show "displacement" and descending diagonals show the "acceleration." Can someone please point me in the right direction to determine how to obtain the shock pulse magnitude and duration from this plot?





RE: Obtaining Shock Pulse Input Data from Shock Response Spectrum
If you have a copy of E. W. Clement's NRL report 7396 for 901 shock, "Shipboard Shock and Navy Devices for its Simulation," there is a brief discussion about the curves you mention. However, it's not obvious that you can get a meaningful time function from the spectra.
TTFN
RE: Obtaining Shock Pulse Input Data from Shock Response Spectrum
This is the first time I have heard of going backward in SRS. Usually the input is specified and the response is plotted. The input shold specify the G level, the type of pulse and the duration; such as: a 2G half-sine for .3 seconds. I do not understand how you can have an SRS response and not know what it is based on. You, maybe, could do this for a single degree of freedom system, but I am not sure it would work with a multi-degree of freedom system. You may want to discuss this with someone who uses SRS regularly, or the people who gave you the response
Regards
Dave
RE: Obtaining Shock Pulse Input Data from Shock Response Spectrum
RE: Obtaining Shock Pulse Input Data from Shock Response Spectrum
If my memory on this is still intact after 15 or 20 years, the task involving that program was scrapped.
Norm
RE: Obtaining Shock Pulse Input Data from Shock Response Spectrum
RE: Obtaining Shock Pulse Input Data from Shock Response Spectrum