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针对道路上发生的液氨泄漏扩散事故,以液氨在道路运输过程中发生的泄漏扩散事故为研究对象,在高斯模型的基础上做出改进,引入罐车速度、车辆运行方向与风向的夹角等,建立了更准确的模型,模拟液氨在道路运输过程中发生泄漏事故后的扩散过程。利用MATLAB软件对道路液氨泄漏事故进行模拟仿真,并将氨气影响区域划分为轻度区、中度区、重度区、死亡区和立即死亡区5个区域;通过实例对比移动点源和固定点源的泄漏扩散过程,得出了两种情况下泄漏过程中和泄漏停止后危险区域范围、位置和峰值浓度及其对应坐标的变化特点。该模型可以快速准确地模拟道路运输泄漏事故的影响范围,可以为事故后的应急救援提供参考。
Aiming at the leakage and leakage of liquid ammonia on the road, taking the leakage and diffusion accident of liquid ammonia during road transportation as the research object, this paper makes improvements on the basis of Gaussian model, and introduces the angle between tanker speed, vehicle running direction and wind direction Etc., a more accurate model was established to simulate the diffusion of liquid ammonia after a leakage accident occurred in the course of road transportation. MATLAB software was used to simulate the ammonia leakage accident in the road and the area affected by ammonia was divided into five areas of mild zone, moderate zone, severe zone, dead zone and immediate death zone. By comparing the moving point source and the fixed Point source leakage diffusion process, obtained two cases of leakage and leakage after the stop of the danger zone range, location and peak concentration and its corresponding coordinate changes. The model can quickly and accurately simulate the impact of road transport leakage accidents, which can provide reference for emergency rescue after accident.