Forming explosive friction testing system and testing method thereof

Abstract

The invention discloses a forming explosive friction testing system and a testing method thereof. The forming explosive friction testing system comprises a supporting frame, a mounting component fixedly connected with the supporting frame, a drop speed loading component above the mounting component and a pressurizing component under the mounting component; a to-be-measured explosive piece is fixed by the mounting component. The forming explosive friction testing system further comprises a static charge amplifier electrically connected with a pressure sensor, a circumferential strain gauge arranged in the circumferential direction of a friction sleeve and a high-speed photographic instrument testing component for obtaining the friction velocity between the to-be-measured explosive piece and the sleeve wall of the friction sleeve; the static charge amplifier is connected with an oscilloscope; the circumferential strain gauge is connected with the static strain gauge through an electric bridge and is merged into an intelligent terminal through the static strain gauge. The testing system can detect the radial pressure change and realize the friction coefficient detection under different speed and pressure conditions through the drop speed loading component and the pressurizing component, so that the quantitative analysis on the effect of external friction conditions on friction coefficients under the conditions of high pressure and high speed is realized, and the application scope and the numerical simulation accuracy of the friction testing system are improved.

Description

technical field [0001] The invention relates to the technical field of explosive stability analysis, in particular to a drop hammer-based friction test system for shaped explosives. The present invention also relates to a test method based on the above test system. Background technique [0002] As a high-energy chemical substance, explosives are easily ignited by the stimulation of various external factors (such as friction, shear, impact, etc.), and friction is an important factor for the ignition of explosives. Especially for the response process of the explosive charge in the low-speed penetration process, the friction between the explosive and the shell and the explosive is an important factor for the early explosion of the explosive and affects the stability. At the same time, for the heat generated by macroscopic friction, the selection of explosive friction coefficient often determines the accuracy of phenomenological calculation. Therefore, it is particularly impor...

AI Technical Summary

Problems solved by technology

Although many researchers have proposed some methods for quantitatively analyzing the friction process of explosives, their scope of application is relatively small, and they still cannot deal with the friction response of shaped charges under high-pressure and high-speed loading conditions.

Images