An experimental test system for testing shock wave overpressure attenuation in a low temperature and low pressure environment

Abstract

The invention provides an experimental test system for testing the overpressure attenuation of shock waves in a low-temperature and low-pressure environment. The system includes a cabin having presettemperature and preset pressure, a shock wave generating module installed at an end portion of the cabin, a shock wave conversion module connected with the shock wave generating module, and a test module for testing the pressure change of shock waves during the operation of the shock waves along the length direction of the cabin; and the cabin is provided with a temperature and pressure adjustmentmechanism for providing the preset pressure and preset temperature for the test cavity of the cabin. With the test system adopted, test temperature and test pressure in the cabin can be adjusted as needed, so that a shock wave test can be performed at set temperature and pressure, a temperature and pressure environment matched with the working condition of a shock wave attenuation test can be provided for the shock wave attenuation test, and therefore, the accuracy and accuracy of the result of the shock wave attenuation test can be improved.

Description

technical field [0001] The invention relates to the technical field of shock wave attenuation law testing, in particular to an experimental testing system for testing shock wave overpressure attenuation in a low-temperature and low-pressure environment. Background technique [0002] When explosives explode in the air, the surrounding medium is directly affected by high temperature and high pressure explosion products, and the detonation products at the contact interface diffuse to the surrounding at a very high speed, compressing the surrounding medium strongly, and the pressure density temperature in the medium has order The shock wave rises sharply, forming an initial shock wave and continuously propagating outward. The difference between the shock wave front pressure value and the initial pressure value of the undisturbed medium is defined as the overpressure peak value of the shock wave. During the outward propagation of the shock wave, with With the increase of the dist...

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Problems solved by technology

At present, the semi-empirical calculation formulas for the attenuation of shock wave overpressure peak value with distance, such as Henrych formula and Backer formula, are mainly obtained from the analysis of data results under standard atmospheric pressure test conditions, and it is difficult to apply to the calculation of shock wave overpressure peak value in low-temperature and low-pressure environments. attenuation

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