Shock Reponse Spectrum

For more information about SRS take a look at the SRS manual.

When you press the Setup button on SRS, the following setup window will open:

A shock response spectrum is a useful tool for estimating the damage potential of a shock pulse, as well as for test level specification.

Calculation parameters

  • Start frequency and End frequency - define the calculation range for the frequency spectrum. The upper limit is set to 2000 Hz.
  • Velocity DC filter - removes the DC component of the calculated time signal “InputChannel”/VelocityHistory.
  • Damping/Quality factor - Different damping factors produce different SRSs for the same shock waveform.
  • Frequency division - defines the resolution of the spectrum in frequency domain. Higher the number, better the resolution.
  • Remove DC offset - removes the DC component of the input time signal.
  • Noise floor - will calculate the noise floor of the input time signal.

Results

  • Acceleration
  • Velocity
  • Displacement

Output channels

  • Absolute max (whole measurement) - composite/maximax (the worst-case extrema for both instances). The composite shock response for the absolute maxima is the maximax.
  • Max (whole measurement) - composite/maximax (the worst-case extrema for both instances). The composite shock response for the absolute maxima is the maximax.
  • Min (whole measurement) - composite/maximax (the worst-case extrema for both instances). The composite shock response for the absolute maxima is the maximax.
  • Absolute max during shock - primary (forced response, computation during the shock).
  • Max during shock - primary (forced response, computation during the shock).
  • Min during shock - primary (forced response, computation during the shock).
  • Absolute max after shock - residual (free vibration, computation after the shock).
  • Max after shock - residual (free vibration, computation after the shock).
  • Min after shock - residual (free vibration, computation after the shock).