Explosive blast overpressure space-time field reconstruction method

Abstract

An explosive blast overpressure space-time field reconstruction method adopts an overpressure sensor array in a blast test system to acquire blast signals, and utilizes a blast overpressure space-time field reconstruction module to reconstruct an explosive blast overpressure space-time field; during reconstruction, a tested area is first meshed, sensor array elements are arranged, an explosion point is then located, a blast velocity field and a blast peak overpressure field are reconstructed, and thereby therefore a blast peak overpressure field reconstruction result is obtained; in combination with the blast peak overpressure field reconstruction result of the point, each parameter of a 'modified Friedlander equation' is solved, so that blast overpressure space-time data are obtained; finally, the reconstructed data are converted into an image file, and thereby therefore the blast overpressure space-time field is visualized. The method provides a basis for the evaluation of the damage effectiveness of blast and the structure and performance of explosive; and meanwhile, the method also is an important means for evaluating the safety of personnel, the shock resistance of equipment and the affection of blast on the surrounding environment.

Description

technical field [0001] The invention belongs to the field of array signal processing and reconstruction, and in particular relates to a reconstruction method of explosion shock wave overpressure space-time field. Background technique [0002] With the advancement of society and science and technology, and the needs of national economic development, explosive technology is increasingly used in various fields such as transportation, construction of water conservancy and hydropower facilities, and the process of moving mountains and reclamation. While the explosion technology is widely used, the impact and harm of the explosion operation on the surrounding environment and building facilities have become the focus of attention. How to assess the power of the explosion, control the hazards of the explosion, and reduce the impact of the explosion operation on the surrounding environment are important contents of the explosion safety technology research. [0003] When the charge e...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a reconstruction method for explosion shock wave overpressure space-time field in view of the inadequacy of the existing local point layout test and strength test that cannot fully understand the shock wave propagation process. The distribution of the peak overpressure field of the explosion shock wave in the region and the attenuation law of the shock wave overpressure with distance and time have realized the reconstruction of the space-time field of the explosion shock wave overpressure, and the process of the shock wave overpressure generated by the explosion with time and space can be clearly imaged. shown, enabling visualization of the space-time field of shock wave overpressure

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