An explosion wave model apparatus with adjustable shock wave waveforms

Abstract

An explosion wave model apparatus with adjustable shock wave waveforms is disclosed. The apparatus includes a multiple-air-chamber driving device, a mixing segment, an expansion segment and a testing segment. The air outlet of the multiple-air-chamber driving device is connected to an air feeding end of the expansion segment through the mixing segment. An air discharging end of the expansion segment is connected to the air inlet end of the testing segment. Compressed air is adopted as driving energy of the apparatus. A multiple-air-chamber multiple-membrane driving manner is adopted. Through controlling the number of the membrane explosion of the air chambers and the explosion time of each air chamber membrane, shock wave waveforms having different peak sizes and different shapes are generated. Through controlling the pressure of high-pressure gas and the flow rate of the released gas, shock wave hyperpressure peak values and positive pressure acting time are adjusted, thus generating simulated shock waves meeting tests.

Description

technical field [0001] The invention relates to the technical field of shock wave simulation loading test, in particular to an explosion wave model device with adjustable shock wave waveform. Background technique [0002] The shock wave generated by the explosion is the most important means of explosion damage. The damage effect of the explosion shock wave has always been the main topic in the field of protection engineering. Under the condition that the prototype nuclear test and the large-yield conventional weapon test cannot be carried out, the use of laboratory technology to realize shock wave simulation is a research topic. The primary means of blast blast damage. [0003] The blast wave simulator has become an effective and widely used blast shock wave test tool, and its driving methods mainly include explosive drive and high-pressure gas drive to generate simulated blast shock waves. The simulation device using high-pressure gas as the driving energy is mainly compos...

AI Technical Summary

Problems solved by technology

[0004] In the traditional explosion wave simulation device driven by multiple air chambers, there are two ways to generate shock waves: one is the way of bursting diaphragms, which usually use explosives to detonate. By controlling the diaphragms of each main chamber to detonate at different times, The shock wave waveform with multiple peaks is thus generated. The disadvantage of this method is that all the gas in the high-pressure gas chamber is released, and the release capacity of the high-pressure gas cannot be controlled, and the specific shape of the waveform is difficult to effectively control; another way is to control the fast valve. The rapid opening and closing of the valve realizes the release of high-pressure gas, and can control the flow of high-pressure gas. However, due to the slow response time of the valve, the opening and closing response time of the fastest response valve that can be found so far is also at the level of tens of milliseconds, and the price is very high. Expensive, for the shock wave test with millisecond-level opening and closing response time, the use of fast valves cannot meet the requirements

Therefore, the traditional blast wave simulation device driven by multiple air chambers is difficult to control the waveform of the shock wave or the peak action time adjustment range is limited due to the limitation of the implementation method or equipment capability.

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