Shock Response SpectrumSRS Analysis Solution

Mechanical shock pulses are often analyzed in terms of the shock response spectrum. The shock response spectrum assumes that the shock pulse is applied as a base input to an array of independent single-degree-of-freedom systems. SDOF system assumes that each system hat its own natural frequency.

Charge
Charge
IEPE
IEPE
Voltage
Voltage
Acceleration
Acceleration
Velocity
Velocity
Displacement
Displacement
Video
Video
High-speed video
High-speed video

highlights

Supported ISO standard

Our SRS solution calculates the shock response spectrum according to ISO 18431-4 standard.

Easy Setup

The sensors and data acquisition system setup is fast and easy. Sensors autodetection and TEDS support will get you to measure in no time.

Selectable Frequency Span

Freely definable calculation range for the frequency spectrum.

Damping/Quality Factor

The selection of damping ratio or quality factor can be easily updated also in the offline mode.

Advanced Math

All relevant parameters such as composite/maximax, primary, and residual are calculated online in real-time. Results in the frequency domain spectrum can be shown as acceleration, velocity, or displacement.

Data Export

The recorded data and calculated parameters can easily be exported in various standard data formats including Mathlab, Excel, Diadem, FlexPro, Universal File Format, and others.

Software included

Every Dewesoft data acquisition system is bundled with award-winning DewesoftX data acquisition software. The software is easy to use but very rich and deep in functionality. All software updates are free forever with no hidden licensing or yearly maintenance fees.

Dewesoft quality and 7-year warranty

Enjoy our industry-leading 7-year warranty. Our data acquisition systems are made in Europe, utilizing only the highest build quality standards. We offer free and customer-focused technical support. Your investment into the Dewesoft solutions is protected for years ahead.

What is Shock Response Spectrum (SRS)

A Shock Response Spectrum (SRS) is a graphical presentation of a transient acceleration pulse’s potential to damage a structure. The horizontal axis shows the natural frequency of a hypothetical Single Degree Of Freedom (SDOF), and the vertical axis shows the peak acceleration that this SDOF would undergo as a consequence of the shock input. 

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

The shock response spectrum is a calculated function based on the acceleration time history. It applies an acceleration time history as an excitation to an array of single-degree-of-freedom (SDOF) systems. Each system is assumed to have no mass-loading effect on the base input.

Shock Response Spectrum (SRS) Analysis and Calculations

  • Start frequency and end frequency: Define the calculation range for the frequency spectrum. The upper limit is set to 1/2 of the sample rate.

  • Velocity DC-filter: Removes the DC component of the calculated time signal.

  • Remove DC offset: Removes the DC component of the input time signal.

  • Noise floor: Calculate the noise floor of the input time signal-.

  • Frequency division (octave): Removes the DC component of the calculated time signal.

  • Damping/quality factor: Different damping factors produce different SRSs for the same shock waveform. Zero dampings will produce a maximum response and very high damping produces a horizontal line.

SRS Output Channels

All the output channels are calculated for acceleration, velocity, and displacement.

The output channels are:

  • 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: the primary (forced response, computation during the shock).

  • Max during shock: the primary (forced response, computation during the shock).

  • Min during shock: the primary (forced response, computation during the shock).

  • Absolute max aftershock: residual (free vibration, computation after the shock).

  • Max aftershock: residual (free vibration, computation after the shock).

  • Min aftershock: residual (free vibration, computation after the shock).

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