How do I Determine Shock Response Spectra?

I have data from several accelerometers on a missile. I need to determine the shock response spectra and can't find an adequate function in the Matlab library. Can someone point me down the right path?

[Om Dariya]

sir, did you get coding related to that problem ? actually i have same problem but , related to gun system .

Answer 1

[bym]

I would say that Alex is looking for something else...

In my experience, the derivative of acceleration is called "jerk". SRS is the maximum {displacement,velocity,acceleration} of a single DOF oscillator at specific frequencies given a certain input time history. I have some code, but have to do some digging... in the meantime here is a good reference if you want to "roll your own" from scratch

http://www.saviac.org/78th_Symposium/Training%20Material/Shock%20Analysis%20Using%20the%20Pseudo%20Velocity%20Shock%20Spectrum%20-%20Part%201%20(10-23-07).pdf

[Alex Fay]

Thanks. I'm reading some background publications from Dr. Gaberson. He actually lives nearby, so I may have to track him down.

[bym]

email him and he'll send you his code...

[Om Dariya]

sir, can i also get that coding? actually i am also doing similar project related to gun system. sir, my mail id is [e-mail]

[Giuseppe Velotti]

Dear, can i also get this code? Thank you.

Answer 2

[Alex Fay]

All,

Shock response refers to environmental testing where the system received a defined input pulse. The pulse is normally a half-sine acceleration with a defined maximum amplitude and duration. The response spectra shows the accelerations, velocities, and displacements of the unit under test.

I found that there is a cottage industry that analyzes the data and sends the results to you, usually in graphic form. I never did get a formula set other than someone sending me the kinematic equations, which ignores all the coupling to the other axes.