Dynamic collision test device for directional simulation of deep-sea mid-shell structure and seabed

Abstract

The invention discloses a dynamic collision test device capable of directional simulating deep-sea mid-shell structure and seabed, including 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. This device is installed in a geotechnical centrifuge for experiments, in a supergravity environment to meet the requirements of simulating the deep sea environment, and create a deep sea high pressure environment through the superimposition of high pressure water pump devices, and adjust the direction of the launch device through the universal rotating shaft, so as to control the shell structure from the specified Directional emission, directional collision with the soil at a predetermined position, and the use of high-speed cameras to shoot the entire experimental process and strain and acceleration sensors to collect experimental data. The present invention simulates the running speed, acceleration and running trajectory when the specific position collides with the surface of the seabed soil when the deep-sea shell-shaped structure is incident in different directions, and obtains the strain change of the shell-shaped structure during the collision, and the impact of the soil after the collision. body stiffness changes.

Description

Technical field [0001] The invention relates to a test device, in particular to a test device for simulating a deep-sea mid-shell structure and a seabed directional dynamic collision test. The deep-sea high-pressure environment is simulated by a centrifuge and a high-pressure water pump, and the launching device is adjusted to make the shell-shaped structure It can collide with the soil at the estimated position and obtain the running speed, acceleration and trajectory of the shell structure. At the same time, it can collect the strain change of the shell structure when the shell structure collides with the soil to evaluate the shell structure The safety of things. Background technique [0002] The ocean occupies about 71% of the earth's surface area, and the deep bottom contains rich oil, heavy metals and other resources. Various countries are trying to develop deep-sea resources. my country has also clearly proposed to build a maritime power and break through the technical dif...

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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