A General Shock Waveform and Characterisation Method

Abstract

A shock waveform is proposed based on the mechanical mechanism of shock generation in a structure. The parameters in the shock waveform have clear mechanical meanings about the generation and development of the shock. A shock signal processing method is proposed and applied to represent a pyroshock or ballistic shock signal in both temporal and frequency domain using finite terms of the shock waveform components. It is found that complexity and dominant shock distance of a shock can be described quantitatively by the number of waveform components (${\eta }_{90\%}$) and a normalised parameter ($\kappa$), respectively. Pyroshock and mechanical shocks in different categories are analysed using the proposed shock waveform to demonstrate its importance and generality in shock representation.