The Shock Response Spectrum Study Based on Gunfire Signal

Abstract

Some gunfire environment can be depicted as a repeated shock or transient vibration environment, which is generally described by one impulse signal. In recent years, the Shock Response Spectrum (SRS) is widely used because it not only describes the shock excitation signal, but also the structural dynamic characteristics. In this paper, based on one finite element model of a certain aircraft loaded with aerial guns, different gunfire responses were analysed and classified. For the unsteady gunfire environment, the frequency domain of it can be depicted by the SRS. Two conversion methods from the time domain response to the frequency domain SRS, which were the Digital Filtering Method and the Motion Differential Equation Method, were introduced in detail. The SRS obtained by two methods were basically the same, which meant the two methods were verified mutually. At last, the standard spectrum of the SRS was obtained. All of the work provides a universal analysis method for the SRS study in engineering filed.