Measurement Methodology: Dangerous Mechanical Impact and Response Measurement Method of Solid Rocket Motor Based on Acoustic Emission

The Solid Rocket Motor (SRM) is widely used as the power source of weapon systems because of its high reliability, good performance and simple structure [1]. With the development of power demand and technology of weapon systems, the energy density of SRM continues to increase. As the weapon system's largest quality initiating explosive device, the safety and stability of its transportation, storage and utilization are critical [2]. The U.S. put forward the concept of Low Vulnerability Ammunitions after the explosion of ammunition caused by the fire of the aircraft carrier “Forrest” in 1967. Low vulnerability means that when the ammunition is excited by external factors such as thermal, mechanical, shock wave, and so on, the ammunition has a little reaction and causes less secondary damage [3]. During transportation, storage, maintenance, and use of SRM, they may encounter dangerous conditions such as falling, impact, overturning vehicles, and drop impact. These dangerous drop impacts often occur in a transient state, which is sudden and random, and it is difficult to monitor and evaluate the damage response in real-time [4].