Cross array type underwater explosion pressure load spatial distribution measuring device and system

Abstract

The invention belongs to the technical field of underwater explosion pressure sensor design, and particularly relates to a cross array type underwater explosion pressure load spatial distribution measuring device and system. According to the invention, the transmission and reflection rules of stress waves in a one-dimensional rod are fully utilized; a cross array type load transmission separationdevice is designed, stress waves propagating from a Hopkinson bar measuring element are transmitted into a flyer, stress wave pulses caused by the fact that the flyer carries complete shock wave loadsare separated from the Hopkinson bar measuring element, and separation of the shock wave loads from the Hopkinson bar measuring element is achieved. The cross array type flyer limiting and recyclingdevice is designed, vertical and transverse displacement of the flyer moving at a high speed is restrained, and safe recycling of the flyer is guaranteed. According to the invention, the Hopkinson baris used as a sensitive element and has huge measuring range and sensitive element strength, so that accurate measurement of underwater explosion shock wave and bubble jet load space distribution under the condition of severe near-field underwater explosion measurement is realized.

Description

technical field [0001] The invention belongs to the technical field of underwater explosion pressure sensor design, in particular to a cross-array underwater explosion pressure load spatial distribution measurement device and system. Background technique [0002] With the rapid development of underwater weapon guidance technology, it is more and more likely that underwater weapons will form a very near-field explosion or even a contact explosion near the ship structure. Forecasts and measurements place higher demands. The current free-field pressure load measurement technology is relatively mature and can accurately measure free-field explosion pressure. However, for the measurement of the spatial distribution of pressure load on the surface of structures under near-field underwater explosion conditions, mature and reliable measurement methods have not yet been formed at home and abroad. [0003] Piezoelectric or piezoresistive wall pressure sensors packaged with sensitive ...

AI Technical Summary

Problems solved by technology

The current free-field pressure load measurement technology is relatively mature and can accurately measure free-field explosion pressure. However, for the measurement of the spatial distribution of pressure load on the surface of structures under near-field underwater explosion conditions, mature and reliable measurement methods have not yet been formed at home and abroad.

[0003] Piezoelectric or piezoresistive wall pressure sensors packaged with sensitive materials such as quartz crystals and piezoelectric ceramics have small measurement ranges, frequency responses that cannot meet the high-frequency component acquisition of underwater explosions, and the strength of sensitive components cannot withstand the severe conditions of underwater explosions. , high cost and other disadvantages; because of its installation and fixing method pasted on the surface of the structure, the thin-film sensor is usually difficult to withstand the harsh environment such as the extremely high pressure peak of the underwater near-field explosion shock wave, the impact of detonation products, and high temperature conditions.

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