基于变网格的水下爆炸冲击波超压场重建

Changed Grid Technology for Reconstruction of Overpressure Field of Shock Wave Induced by Underwater Explosion

利用走时层析方法重建水中爆炸冲击波超压场,用于进行水中爆炸威力测评。针对该方案对重建区域分辨率的要求,提出了对待重建区域采用疏密相间网格和自适应网格结合的变网格技术,旨在用较少数目的传感器重建出较高分辨率的超压场。建立了水中爆炸场重建模型,利用Matlab进行仿真试验。仿真结果表明,相比传统的规则网格重建方法,该方案重建精度更高、收敛速度更快。

In order to assess blast power, tomographic methods is adopted to reconstruct overpressure field of shock wave induced by underwater explosion. A changed-grid method based on the density- grid and the adaptive-grid is proposed to meet the recondtruction model requirement for multi-resolution . The purpose is to use a smaller number of sensors to reconstruct the field overpressure with higher resolution. The reconstruction model of underwater explosion is established and reconstruction accuracy is analyzed. Finally,a conclusion has been raised through the analysis and comparison of simulation results, that the method has higher accuracy and velocity than traditional methods.