Initiating explosive device diaphragm for multi-start liquid-propellant rocket engine

The invention belongs to the technical field of liquid-propellant rocket engines, and discloses an initiating explosive device diaphragm for multi-start liquid-propellant rocket engine. The diaphragmcomprises a diaphragm body; an outer ring scribed line, an inner ring scribed line and a star-shaped scribed line are arranged on a first disc surface of the diaphragm body; the star-shaped scribed line is arranged between the outer ring scribed line and the inner ring scribed line, and the two ends of the star-shaped scribed line are connected with the outer ring scribed line and the inner ring scribed line; and the inner ring scribed line is an open type arc scribed line, and the outer ring scribed line is a closed annular scribed line. According to the initiating explosive device diaphragmfor the multi-start liquid-propellant rocket engine, the difference of pressure borne by the front side and the back side of the initiating explosive device diaphragm can be greatly increased, and theworking reliability and th