An underwater structure impact test device

Abstract

The invention relates to the technical field of underwater pressure-resistant structure crash tests, in particular to an underwater structure crash test device. It includes a semi-open pressure cylinder, a measuring chamber is arranged inside the semi-open pressure cylinder, and a circular opening end connected with the measuring chamber is arranged on the upper end of the semi-open pressure cylinder; the opening end of the semi-open pressure cylinder is provided with There is a pressure-bearing piston; the pressure-bearing piston is provided with a test piece installation hole that penetrates up and down, and a cylindrical shell structure test piece is provided in the measurement chamber of the semi-open pressure cylinder. The gap between the piston and the cylindrical shell structure test piece is filled with liquid. In the present invention, independent pressurizing devices are respectively arranged on the test piece of the cylindrical shell structure and the pressure-bearing piston, which can separate the axial stress and the circumferential stress acting on the cylindrical shell structure. By changing the loads of the two independent pressurizing devices The size can change the compressive stress state of the cylindrical shell structure specimen, so that the underwater impact test of the cylindrical shell structure can be carried out under different stress states.

Description

technical field [0001] The invention relates to the technical field of underwater pressure-resistant structure crash tests, in particular to an underwater structure crash test device. Background technique [0002] Deep-sea equipment plays a pivotal role in the development of marine resources. In recent years, my country's deep-sea equipment has made great progress. Among them, the "Jiaolong" and "Deep Sea Warrior" manned submersibles are important representatives of advanced deep-sea equipment and technology. [0003] However, while developing engineering problems, the corresponding basic scientific problems have not been effectively solved. At present, when designing large-scale equipment such as submersibles and submarines, the factors of underwater collisions are not considered enough, and the design is mostly based on the safety factor. The form is generally covered, and there is no in-depth study of the deformation response and failure mechanism of the structure when th...

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Problems solved by technology

Therefore, this brings greater difficulty to the design of the test device. In a conventional closed pressure cylinder, the above-mentioned tests are too closed, and it is difficult to observe the test state, and it is impossible to accurately control the test phenomenon and results.

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