爆炸冲击波场参数数字重构技术研究

Research on Digital Reconstruction of Explosion Shock Wave Field Parameters

  • 摘要: 为提高爆炸场参数威力的重构精度与推动毁伤评估技术的发展,提出一种改进的压缩感知技术方法对爆炸冲击波参数威力进行数字重构. 另外,针对缺乏爆炸冲击波超压与动压一体化测试方法的现状,基于皮托管原理设计了一套复合型传感器同时测量冲击波超压与动压并通过试验验证了可靠性. 提出的威力重构方法通过稀疏度自适应匹配追踪(SAMP)确定爆炸压力信号的稀疏度,在考虑信号先验分布的情况下确定信号的稀疏矩阵进而通过高斯似然函数对采样数据进行重构,与试验测试数据相比,基于改进的压缩感知技术对爆炸场超压、动压信号的重构偏差小于15%. 爆炸冲击波场参数精准化重构为数字化、智能化毁伤评估技术发展提供重要保障.

     

    Abstract: To improve the reconstruction accuracy of explosion field parameter power and promote the development of damage assessment technology, an improved compression sensing technology method was proposed to digitally reconstruct the explosion shock wave parameter power. In addition, in response to the lack of integrated testing methods for explosion shock wave overpressure and dynamic pressure, a composite sensor was designed based on the pitot tube principle to simultaneously measure shock wave overpressure and dynamic pressure, and its reliability was verified through experiments. The proposed power reconstruction method determined the sparsity of the explosion pressure signal through sparsity adaptive matching pursuit (SAMP), and determined the sparsity matrix of the signal while considering the prior distribution of the signal. Then, the sampled data was reconstructed using a Gaussian likelihood function. Compared with experimental test data, the reconstruction deviation of the explosion field overpressure and dynamic pressure signals based on the improved compressive sensing technology is less than 15%. The precise reconstruction of explosion shock wave field parameters provides an important guarantee for the development of digital and intelligent damage assessment technology.

     

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