Device and method for measuring external pressure resistance structure response of composite material shell

Abstract

The invention provides a device and method for measuring the external pressure resistance structure response of a composite material shell. The device comprises a shell which is provided with a pressing opening, a cover body detachably matching the shell to form a closed inner cavity, and a strain gauge. The inner side of the cover body is suitable for being connected with the open end of a composite material shell to be measured, a liquid outlet hole is formed in the cover body, a volume measuring device is connected to the liquid outlet hole, and the liquid outlet hole is suitable for communicating the volume measuring device with the inner cavity of the composite material shell to be measured. The strain gauge is connected with a data acquisition device through a wire and is suitable for being attached to the inner wall of the composite material shell. According to the device and method for measuring the external pressure resistance structure response of a composite material shell,the external pressure resistance strain process and the external pressure resistance volume variation of the composite material shell can be simultaneously measured in real time; according to the measured strain process and volume variation data, the structural shape change and buoyancy of the composite material shell can be more accurately controlled, so that the cruising ability and submergencedepth of the composite material shell in deep sea tasks can be improved.

Description

technical field [0001] The invention belongs to the technical field of external pressure shell test devices, and in particular relates to a composite material shell anti-external pressure structure response measurement device and method. Background technique [0002] With the development of deep-sea exploration needs, external pressure-resistant shells made of traditional metal materials can no longer provide enough buoyancy, and will consume a lot of endurance power. Therefore, composite external pressure-resistant shells with light weight and high strength are becoming more and more attention. Composite external pressure shells for deep-sea missions will continue to bear pressure as the depth of the dive increases. Therefore, in order to ensure the safety of their use, it is usually necessary to carry out external Pressure test to determine the bearing limit of external pressure. The load-bearing detection device of the conventional external pressure shell uses the incom...

AI Technical Summary

Problems solved by technology

Since the designable composite material external pressure shell is an anisotropic structure, its structural response is different from that of conventional metal shells, and it is usually impossible to accurately establish the relationship between its external dimensions and pressure, so experimental determination is required

Existing detection devices can accurately perform limit load tests, but cannot complete accurate measurement of volume changes. Therefore, a new test device and method are needed to accurately measure the structural response of external pressure shells under external pressure conditions, and realize its load-carrying capacity. Simultaneous testing with volume changes, improving product testing quality and providing support for structural optimization design

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