Djelosevic Mirko, Tepic Goran
Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, 21000 Novi Sad, Serbia.
J Hazard Mater. 2019 Jan 15;362:17-35. doi: 10.1016/j.jhazmat.2018.09.013. Epub 2018 Sep 6.
This study presents a completely new methodology for fragmentation analysis due to the explosion of cylindrical tanks. The identification of fragments' kinematic parameters was accomplished with an exact system of differential equations of motion with good convergence and high accuracy of numerical results. The fluctuation effect of the aerodynamic force of the fragments on their range is interpreted by statistical distributions. The direction and intensity of the fragments' initial velocity are determined by the inertial model. An original probabilistic mass method is proposed to represent the discrete distribution of the number of generated fragments. The correlation between the number and mass of the fragments was established by Monte Carlo simulation. The estimation of the fracture lines was carried out by the tank stress mapping procedure using data from the ANSYS software. The identification of potential fracture lines with the knowledge of the number-to-mass dependence of the fragments allows a reliable estimate of the shape of the generated fragments. The estimated sectoral risk due to tank fragmentation is consistent with literary accident data. The presented methodology can be fully applied to the assessment of the risk of other types of tanks and process installations.
本研究提出了一种全新的用于分析圆柱形罐体爆炸碎片的方法。通过一个精确的运动微分方程组来确定碎片的运动学参数，该方程组具有良好的收敛性和高精度的数值结果。碎片气动力对其射程的波动效应通过统计分布来解释。碎片初始速度的方向和强度由惯性模型确定。提出了一种原始的概率质量法来表示所产生碎片数量的离散分布。通过蒙特卡洛模拟建立了碎片数量与质量之间的相关性。利用ANSYS软件的数据，通过罐体应力映射程序对断裂线进行了估计。在了解碎片数量与质量相关性的情况下识别潜在的断裂线，能够可靠地估计所产生碎片的形状。罐体碎片造成的扇形风险估计与文献中的事故数据一致。所提出的方法可完全应用于评估其他类型罐体和工艺装置的风险。
