Using a Random Vibration Test Specification to Cover a Shock Requirement via a Pseudo Velocity Fatigue Damage Spectrum

Aerospace and military components must be designed and tested to withstand shock and vibration environments in terms of shock response spectrum (SRS) and power spectral density (PSD) specifications. Shock tests are usually more difficult to configure and control in the test lab. Furthermore, some lower and mid-level SRS specifications may lack the true damage potential to justify shock testing. The purpose of this paper is to demonstrate a comparison method based on the fatigue damage spectrum (FDS) to determine whether the random vibration test covers the shock requirement. This method is found to be effective within a framework of assumptions.