A dynamic collision test device for simulating deep-sea mid-shell structures and seabed

Abstract

The invention discloses a test device for simulating dynamic crash of a deep-sea shell-type structure and the seabed, comprising a launching device, a high-pressure water pump device, a high-speed camera, a sensor system, a data acquisition and control system and the like. The device is set up in a geotechnical centrifuge for test so that the supergravity environment reaches the requirements of simulating the deep-sea environment, a deep-sea high-pressure environment is created through superimposition of the high-pressure water pump device; the launching device can rotate vertically and horizontally to adjust the launching direction under the control of a cross universal coupling, the shell-type structure is launched to the surface of the soil to collide, the high-speed camera is used forcapturing the whole experimental process and strain and acceleration sensors are used for collecting experimental data. According to the test device in the invention, the running speed, acceleration and running trajectory situations when the deep-sea shell-type structure at different incident angles collides with the surface of the seabed soil are simulated, and the strain change of the shell-typestructure during collision and the stiffness change of the soil after the collision are obtained.

Description

technical field [0001] The invention relates to a test device, in particular to a dynamic collision test device for simulating a deep-sea shell-shaped structure and seabed. The deep-sea high-pressure environment is simulated by a centrifuge and a high-pressure water pump, and the deep-sea shell-shaped structure is launched from different The incident angle collides with the surface of the seabed soil to obtain the running speed, acceleration and running trajectory of the shell-shaped structure, and at the same time collect the strain change of the shell-shaped structure when the shell-shaped structure hits the soil to evaluate the shell-shaped structure. safety. Background technique [0002] The ocean occupies 71% of the earth's surface area. The rich oil deposits in the deep bottom, the accumulation of countless manganese clusters and other resources attract some industrialized countries to compete for ocean development. my country clearly proposes to build a marine power ...

AI Technical Summary

Problems solved by technology

At present, international submersibles can generally dive to a water depth of 6 kilometers. Submersibles are subjected to huge compressive stress, and are prone to structural buckling and instability when they collide with the seabed, resulting in catastrophic consequences.

At present, the strength test of the submersible structure is generally carried out in a high-pressure environment, which is usually static loading and does not involve the collision with the structure. Therefore, it is urgent to develop a device that can simulate the dynamic collision between the submersible and the seabed under ultra-high pressure conditions. test device

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