Estimation method of equivalent explosive charge for simulation of centrifuge underwater explosion test

Abstract

The invention discloses an estimation method of equivalent explosive charge for simulation of centrifuge underwater explosion test. The estimation method includes building an explosion test device, carrying out explosion test on conditions of different explosive charge Wi, charging submersion and air pressure equivalent water column height, measuring to obtain shock wave peak Pmi and bubble pulsation cycle Ti of the ith underwater explosion test, carrying out fitting operation with theoretical formula to obtain equivalent charging coefficient n so as to obtain equivalent explosive charge nW ofthe explosion device. The shock wave peak and the button pulsation cycle data obtained by measurement are compared with empirical formula data while the least square fit result is processed so that the equivalent charging coefficient and equivalent explosive charge are obtained. Therefore, explosion state of explosives is estimated, detonation reliability is checked, design reference is providedfor parameter of explosion vessels, centrifuge underwater explosion test is simulated truly, and the estimation method is featured by high convenience, stability and reliability.

Description

technical field [0001] The invention belongs to the technical field of explosion, and relates to an explosion device capable of resisting deep water pressure used in an underwater explosion test of a centrifuge and a method for estimating the equivalent amount of explosive. Background technique [0002] Once large-scale dams are damaged by explosions during wartime, multiple water conservancy projects will collapse, which will cause huge personal injuries and economic losses. Therefore, the research on anti-blast safety of dam engineering has very important theoretical guiding significance for minimizing losses and evaluating dam safety. Due to limited funds and sites, it is difficult to obtain the damage mechanism of large-scale dams under the action of blast loads through prototype blast tests; it is also difficult to truly reveal the mechanical behavior and failure process of blast prototypes by traditional structural model tests. The geotechnical centrifuge increases th...

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Problems solved by technology

Due to limited funds and sites, it is difficult to obtain the damage mechanism of large-scale dams under the action of blast loads through prototype blast tests; it is also difficult to truly reveal the mechanical behavior and failure process of blast prototypes by traditional structural model tests

The geotechnical centrifuge increases the gravity of the model through high-speed rotation, so that the model medium body produces a self-weight stress similar to that of the prototype. The deformation and failure mechanism of the model are similar to the prototype, so that complex geotechnical engineering and dynamic problems can be simulated. One of the commonly used methods in mechanics, but its expensive cost and test costs have limited its large-scale promotion and use.

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