Underwater explosion pressure test experiment system and method

An underwater explosion pressure test experiment system, characterized in that, the underwater explosion pressure includes the surface explosion pressure and the explosion pressure in water;

• the system includes a container, a drug pack, a controller, protective glass, two high-speed cameras, a projector, a computer, an image analysis module, and an explosion pressure calculation module;
• the container, is used for holding liquid;
• the liquid comprises water;
• the drug pack, disposed in the liquid, for generating a measured explosion source to cause fluctuations in the water surface;
• the controller, is used for controlling the initiation of the package and synchronously triggering the high-speed camera;
• the protective glass, located above the container and below the projector, is used to prevent water in the container from splashing high into the sky;
• the high-speed cameras, are used for image acquisition, capturing images of the surface state of the liquid contained in the container;
• the projector, connected to the computer, is used for projecting a computer generated scattered speckles onto the surface of the liquid contained in the container;
• the computer, connected to the projector is used for generating and outputting scattered speckles and controlling the projector;
• the computer, connected to the controller and the high-speed cameras respectively, is used to receive the controller's synchronous trigger signal and pass it to the high-speed cameras, control the trigger of the high-speed cameras, and receive and store the image captured by the high-speed cameras;
• the image analysis module, loaded on the computer, is used for processing and analyzing images acquired by the two high-speed cameras, calculating and outputting the displacement and strain of the water surface based on the images;
• the explosion pressure calculation module, mounted on the computer, is used for calculating a surface explosion pressure of the first fluctuating water surface position based on the volume elastic modulus of the water and the calculated strain;
• Determining a dimensionless parameter K value indicative of an explosion energy of the drug pack according to the surface explosion pressure;
• Based on the K value, according to the formula
• P
• m
• =
• K
• ×
• (
• w
• 1
• /
• 3
• R
• )
• 1.13
• ,
• a variation curve of the explosion pressure at different points in the water with the distance from the explosion source is calculated;
• wherein, Pm is the underwater explosion pressure, in units of MPa;
• R is the distance from the different position to the explosion source, in units of m;
• w is the amount of explosives, in units of kg;
• Based on the variation curve, the explosion pressure at any location in the water is determined.