Method for measuring deformation of metal cylinders under internal explosion effect and device

Abstract

Disclosed are a method for measuring deformation of metal cylinders under an internal explosion effect and a device. The device consists of an exploder, a priming device, a plurality of electric probes, a multichannel detonation velocity meter and signal recording equipment. The exploder is arranged on an axis of a metal cylinder, the priming device detonates the exploder and outputs a priming time signal, the electric probes are arranged outside the metal cylinder, by the aid of the multichannel detonation velocity meter, pulse response is generated when measuring points of the electric probes contact with the wall of the metal cylinder, the signal recording equipment is used for recording output pulses of the multichannel detonation velocity meter and the priming time signal, gap values among the measuring points of the electric probes and the wall of the metal cylinder form a non-equivalence sequence, and when one of the electric probes contacts with the wall surface of the metal cylinder, a deformation value measured at the position of the corresponding measuring point of the electric probe corresponds to radial deformation of the metal cylinder. The method and the device have the advantages of simplicity, directness, reliable measurement results, easiness in operation and the like, measurement of deformation of different ranges is realized by means of changing mounting positions of the measuring points of the electric probes, and the method and the device are particularly applicable to measuring large-deformation parameters.

Description

technical field [0001] The technical field of explosion mechanics of the present invention relates to a method for measuring the deformation of a metal cylinder under the action of an explosion, in particular a method and a device for measuring the deformation of a metal cylinder under the action of an internal explosion by using an electric probe. Background technique [0002] The measurement of the radial deformation of the explosion vessel after being impacted by the explosion is of great significance for the analysis and research of the mechanical parameters of the explosion. At present, the main means of measuring the deformation of the metal cylinder under the action of the internal explosion are as follows: one is to stick a strain gauge on the outer wall of the metal cylinder to measure the dynamic deformation of the container; the other is to manually measure the deformation of the metal cylinder with measuring tools Measurement; the third is to use a high-speed cam...

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Problems solved by technology

[0003] In the first method, strain gauges can usually only measure a small range of deformation, and the radial deformation parameters need to be further deduced and converted during the measurement; the second method uses manual measurement of container deformation after the experiment, due to tools and human factors It will also cause certain errors in the measurement results, and at the same time it cannot reflect the relationship between the deformation of the metal cylinder and time; the third kind of metal cylinder deformation high-speed camera experiment requires excellent performance and expensive shooting equipment, which is not available in general laboratories Experimental conditions, and the protection of shooting equipment is also a problem

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