Measurement of Piston Motion of Two-stage Gas Gun Based on Strain Gauge Measuring System

doi:10.3969/j.issn.1000-1093.2021.08.025

Abstract

Abstract: In order to study the motion process of piston in the interior ballistics of two-stage light gas gun,the piston motion is measured using a strain guage measuring system.The measuring points of strain gauge were laied at a certain distance for the external wall of pump tube of 57 mm/10 mm two-stage light gas gun, and the ring strain of the pump tube caused by piston motion was monitored and measured during the launch of the light gas gun. The change of internal ballistic pressure in the process of piston motion under typical experimental conditions was obtained directly. The piston motion time history and the relationship between displacement and bottom pressure were derived. The results show that the relationship between piston velocity and displacement is in good agreement with the theoretical results, and the feasibility of the proposed method is verified. It provides theoretical guidance for optimizing the program parameters of the internal ballistic of the light gas gun and improving the launching performance of the two-stage light gas gun.

Key words: two-stagelightgasgun, strainmeasurement, internalballisticpressure, timehistoryofpistonmovement

CLC Number:

TJ06

ZHAO Qifeng， LI Yunliang， LI Jin， ZHANG Xiangrong， ZHU Yurong， TAN Shushun, ZHANG Zidong. Measurement of Piston Motion of Two-stage Gas Gun Based on Strain Gauge Measuring System[J]. Acta Armamentarii, 2021, 42(8): 1803-1808.

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