Chemical explosive loading low-temperature impact initiation experimental device and method

Abstract

The invention discloses an explosive loading low-temperature impact initiation experimental device and method. The device comprises a chemical explosive impact loading system, a partition, a to-be-tested sample, a base and a low-temperature control system, wherein the low-temperature control system comprises a cooling device, a temperature sensor and a low-temperature controller; the partition comprises an upper thermal insulating layer and a lower attenuation layer. The method comprises the following steps: determining a booster explosive, selecting the thermal insulating layer and the attenuation layer according to the attenuation law of impact waves in materials, determining the thicknesses of both layers, properly assembling the experimental device, setting target temperature and cooling rate, priming a detonator when the temperature reaches the target temperature and becomes stable, and recording various performance parameters of the sample during the explosion process. The chemical explosive loading low-temperature impact initiation experimental device provided by the invention can directly cool the to-be-tested sample, and is high in speed and efficiency and uniform in cooling; moreover, the sensor is placed inside the to-be-tested sample, so that timely temperature feedback is achieved and the precision is high; besides, the partition is formed by the thermal insulating layer and the attenuation layer, so that the impact loading control cannot be affected by low temperature.

Description

technical field [0001] The embodiments of the present invention relate to the fields of energetic material detonation performance testing technology, low temperature test technology, etc., more specifically, the embodiments of the present invention relate to a chemical detonation loaded low temperature impact detonation experimental device and using the device to carry out chemical detonation loaded low temperature The method of shock initiation experiment. Background technique [0002] Shock initiation experiment is an important means to study the detonation performance of energetic materials. The detonation performance of energetic materials is not only related to its own properties, but also closely related to the ambient temperature. Therefore, the research on energetic materials often requires shock initiation experiments at a specific temperature. [0003] At present, the most commonly used method for impact initiation experiments on energetic materials below room tem...

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Problems solved by technology

[0004] 1. The chemical explosion impact loading system is affected by the low temperature environment

When the above device cools the tested sample, it inevitably cools the chemical explosion shock loading system, resulting in inconsistent initial shock loading conditions at different temperatures

[0005] 2. The temperature control accuracy is low

The low temperature control system indirectly controls the temperature of the tested sample by controlling the temperature in the low temperature test chamber. This indirect control is prone to temperature feedback lag, low temperature control accuracy, and the sample temperature is easy to "overshoot", thus affecting the test results.

[0006] 3. Low temperature control efficiency

The entire experimental device needs to be cooled by heat exchange with the surrounding environment, and the internal space of the entire experimental box is large, the cooling process of the sample to be tested is slow and uneven, and the temperature gradient is prone to appear inside the sample, requiring a long holding time (1 hour above) to stabilize the overall temperature of the sample to the target temperature

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