Here is a sample SRS specification. The ramp is a constant velocity line with slope = 6 dB/octave.

SRS Q=10

fn(Hz) Peak Accel (G)

10 10

2000 2000

10000 2000

Here is a set of files which satisfy the SRS.

ASCII text: srs2000G.zip

The files are:

srs2000G_accel.txt – time(sec) & accel (G)

srs2000G_vel.txt – time(sec) & vel (in/sec)

srs2000G_disp.txt – time(sec) & disp (in)

srs2000G_srs.txt – natural freq (Hz) & peak pos (G) & peak neg (G)

Here is the Matlab version: srs2000G.mat

The acceleration time history can be applied as a base excitation for a modal transient analysis. It roughly simulates a mid-field pyrotechnic shock.

Note that the corresponding velocity and displacement time histories each have a net value of zero.

* * *

Here is another SRS specification. The ramp is a constant velocity line with slope = 6 dB/octave.

SRS Q=10

fn(Hz) Peak Accel (G)

10 10

1000 1000

10000 2000

Here is a time history which satisfies the SRS: srs1000G_accel.txt – time(sec) & accel (G)

* * *

The time histories were generated using:

Matlab script: Vibrationdata Signal Analysis Package – SRS damped sine time history synthesis function

– Tom Irvine

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