The vibration-collision behavior during the diaphragm's fracture in hypersonic impulse facilities

Abstract

The shock tunnel is essential for investigating the dynamic and thermal characteristics of hypersonic flight. A critical component of this facility is the diaphragm, which serves as a quick-opening valve. The dynamic behavior associated with diaphragm failure is intricate, and the interaction between the diaphragm and the shock tunnel presents a significant nonlinear problem that can damage the facility. Previous research has primarily focused on predicting the burst pressure of the diaphragm, often overlooking the vibration characteristics associated with its failure. This study established a dynamic model based on the Johnson-Cook diaphragm and shock tunnel model. Utilizing this model, we analyzed the vibration and collision behavior and identified four distinct stages of diaphragm failure. Furthermore, we investigated how pressure influences the diaphragm's vibration and collision behavior.