Shock

Spectrogram of a shock event

Spectrogram of a shock event
  1. What is shock analysis?
  2. What is shock response spectrum used for?
  3. What is Q in shock?

What is shock analysis?

It calculates and defines how a single degree-of-freedom system with different hypothetical natural frequencies would respond to the shock. To illustrate how this is helpful, let's take that 50g, 10ms pulse and calculate how a system with a 30 Hz, 85 Hz, and 250 Hz natural frequency responds to that input.

What is shock response spectrum used for?

The shock response spectrum is a useful tool for estimating the damage potential of a shock pulse, as well as for test level specification. Note that MIL-STD-1540C and MIL- STD-810E require this format for certain shock environments.

What is Q in shock?

The level of damping is demonstrated by the "quality factor", Q which can also be thought of transmissibility in sinusoidal vibration case. Relative damping of 5% results in a Q of 10.

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