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In order to ensure the efficiency of response and disposal and reduce the damage caused by the hazardous gas leaks,it was necessary to quickly and accurately trace the location of the leak point as well as the source strength. In this article,a method of hazard location and source strength determination based on a complex algorithm was proposed. The basis of the algorithm was to compare the difference between the concentration of the monitored gas and the concentration calculated by the atmospheric diffusion model,and take the difference as the objective function,so that the parameter with the smallest objective function value was the optimal result of the source intensity and position. The results show that the complex algorithm can quickly and accurately obtain the location and source strength of the leakage source. Compared with the traditional simplex method,the compound algorithm has no restriction on the selection of initial value. Even if the selected initial value has a large deviation from the true value,the position and intensity of the source can be quickly obtained through the iteration of the complex algorithm,avoiding the shortcoming of the traditional simplex method,which has high requirements on the selection of initial value. A comparison of particle swarm optimization,genetic algorithm,simplex and complex algorithm is made in three aspects: traceability efficiency,traceability accuracy and traceability stability,which depicts that the complex algorithm is progressive. The complex algorithm can be applied to trace sources and determine source strength for continuous and instantaneous releases.
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为提高危险气体泄漏事故的应对处置效果,减少危险气体泄漏事故造成的损失,并快速准确地追溯泄漏点的位置以及源强,提出一种基于复合形算法的危险源定位及源强确定的方法,该算法基础是计算监测气体质量浓度与大气扩散模型计算得到质量浓度之差,并将该差值作为目标函数,使目标函数值最小的参数即为源强和位置的最优结果。研究结果表明:复合形方法可以快速、准确地得到泄漏源点的位置及其源强。相较于传统的单纯形法,复合形算法对于初始值的选择没有限制,即使所选择的初始值与真值偏差较大,也能通过复合形算法迭代迅速得到泄漏源的位置和强度,避免传统单纯形法对初始值选择要求高的缺点。从溯源效率、溯源准确性及溯源稳定性等3个角度对比分析粒子群算法、遗传算法、单纯形算法和复合形算法,复合形算法综合最优。复合形算法对于连续泄漏及瞬时泄漏均有较好的溯源能力。
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张建文 (1969—),男,北京人,博士,教授,博士生导师,主要从事计算流体力学与传热、安全工程等方面的研究。E-mail:zhangjw@mail.buct.edu.cn。
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张建文 (1969—),男,北京人,博士,教授,博士生导师,主要从事计算流体力学与传热、安全工程等方面的研究。E-mail:zhangjw@mail.buct.edu.cn。
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Traceability result of leakage scenario
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| 溯源方法 | 粒子群算法 | 遗传算法 | 混合粒子群—单纯形 | 复合形算法 |
| 初始值选取 | 无影响 | 无影响 | 无影响 | 无影响 |
| 寻优迭代次数:场景1、2 | 20/50 | 50/100 | 120/221 | 900/1022 |
| 溯源时间/s:场景1、2 | 0.62/2.12 | 0.19/0.56 | 1.11/3.32 | 0.35/1.20 |
| 泄漏源位置/m:场景1、2 | (9.8,5.2,3.6)/ (10.5,21.1,3.3) | (9.3,5.6,3.3) / (10.8,21.8,3.4) | (9.5,5,2.5) / (9.5,20,2.6) | (9.9,5.0,3.4) / (10.9,20.1,2.8) |
| 源强Q/(mg.s-1) :场景1、2 | 99 63/9 952 | 10 489/ 9651 | 9 873/9 893 | 10 047/9 712 |
| 泄漏发生时间T/s:场景2 | 14.1 | 15.5 | 14.3 | 15.2 |
| 溯源误差/%:场景1、2 | 24.4/27.0 | 35.2/37.2 | 23.0/24.1 | 13.7/19.1 |
| 稳定性:场景1、2 | 0.85/0.85 | 0.6/0.6 | 1/1 | 1/1 |
), ArticleFig(id=1167812036240093763, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1149735937002881093, language=CN, label=表1, caption=
泄漏场景溯源结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 溯源方法 | 粒子群算法 | 遗传算法 | 混合粒子群—单纯形 | 复合形算法 |
| 初始值选取 | 无影响 | 无影响 | 无影响 | 无影响 |
| 寻优迭代次数:场景1、2 | 20/50 | 50/100 | 120/221 | 900/1022 |
| 溯源时间/s:场景1、2 | 0.62/2.12 | 0.19/0.56 | 1.11/3.32 | 0.35/1.20 |
| 泄漏源位置/m:场景1、2 | (9.8,5.2,3.6)/ (10.5,21.1,3.3) | (9.3,5.6,3.3) / (10.8,21.8,3.4) | (9.5,5,2.5) / (9.5,20,2.6) | (9.9,5.0,3.4) / (10.9,20.1,2.8) |
| 源强Q/(mg.s-1) :场景1、2 | 99 63/9 952 | 10 489/ 9651 | 9 873/9 893 | 10 047/9 712 |
| 泄漏发生时间T/s:场景2 | 14.1 | 15.5 | 14.3 | 15.2 |
| 溯源误差/%:场景1、2 | 24.4/27.0 | 35.2/37.2 | 23.0/24.1 | 13.7/19.1 |
| 稳定性:场景1、2 | 0.85/0.85 | 0.6/0.6 | 1/1 | 1/1 |
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