近地场景下爆炸型烟雾弹结构仿真方法

Structure Simulation of Explosive Smoke Bomb in Near-ground Scene

爆炸型烟雾弹在反制红外武器、保护高价值军事目标方面具有重要意义。目前绝大多数的烟雾仿真模型未考虑到爆炸的矢量信息和近地粒子扩散效果,在壁面效应与空气湍流现象显著的近地场景下对爆炸型烟雾仿真的真实性较低。针对现有方法,在近地场景下对爆炸型烟雾弹仿真精度差的问题,提出一种近地场景下的爆炸型烟雾弹结构模型仿真方法。该方法利用粒子位置信息代替粒子模型的生命周期,以高斯烟团模型为基础,构建了基于爆弹方向和壁面效应的近地烟雾爆炸模型,以提高对近地烟雾弹爆炸场景仿真的精确性。在仿真的图像上采用结构相似度(Structural Similarity,SSIM)分析,经过最佳参数选取实验后,SSIM值达到0.9443,标准差为±0.0005。对比粒子系统-高斯烟团模型、椭球爆炸模型和爆炸型烟雾弹模型,分别高出0.0112、0.1329和0.0063。实验结果对比表明,新模型在烟雾仿真中具有明确的方向信息,对烟雾湍流和壁面效应的细节表达能力更强,对近地烟雾弹爆炸场景的仿真具有更高的精确性。

Explosive smoke bombs are of great significance in countering the infrared-guided weapons and protecting the high-value military targets.At present,most of the smoke simulation models do not take into account the vector information of explosion and the near-ground particle diffusion effect,and the authenticity of the explosion smoke simulation is low in the near-ground scene where the wall effect and the air turbulence phenomenon are significant.For the poor simulation accuracy of explosive smoke bomb in near-earth scene,a simulation method of explosive smoke bomb structure model in near-ground scene is proposed.This method uses the particle position information to replace the life cycle of the particle model.Based on the Gaussian puff model,a near-ground smoke explosion model considering the explosion flying direction of bomb and the wall effect is constructed to improve the simulation accuracy of near-ground smoke bomb explosion scene.The structural similarity(SSIM)analysis is used on the simulated image.After the best parameter selection experiment,the SSIM value reaches 0.9443 and the standard deviation is±0.0005.The SSIM value of the proposed model is 0.0112,0.1329 and 0.0063 higher than those of the particle system-Gaussian smoke model,ellipsoid explosion model and explosive smoke bomb model,respectively.The experimental results shows that the proposed model has clear direction information in smoke simulation,stronger ability to express the details of smoke turbulence and wall effect,and higher accuracy in the simulation of near-ground smoke bomb explosion scene.