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A prediction model for debris scattering in vented gas deflagration
Process Safety and Environmental Protection ( IF 7.8 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.psep.2019.12.002
Song Sun , Mingyang Wang , Huadao Xing , Kanghua Gao , Yanyu Qiu

Abstract As one of the main modes of damage caused by gas explosions in industrial production, the debris generated by the explosion threatens the safety of surrounding personnel and buildings. By means of experimental research and theoretical modelling, the debris generated by the vented component was experimentally studied, and a predictive model of the scattering range of explosion-induced debris was proposed. Through experiments using a self-designed explosion test apparatus, it is found that the gas explosion exerts a quasi-static pressure, and the vented plate is cracked by the plastic hinge under deflagration load. According to the force and the motion equation of the debris, the predictive model of the debris trajectory was proposed by differentiating the scattering process. The distribution of random variables in the model was determined by experimental data, and the scattering range of explosive debris was obtained using the Monte Carlo method. By comparing the calculated results with experimental data gathered under three typical conditions, the model values were seen to agree with the experimental values, and this model can predict the scattering range of debris. The proposed prediction model for debris scattering can provide a reference for the design of works used to protect against debris damage and subsequent domino effect.

中文翻译:

排气爆燃中碎片散射的预测模型

摘要 作为工业生产中瓦斯爆炸的主要危害方式之一,爆炸产生的碎片威胁着周围人员和建筑物的安全。通过实验研究和理论建模,对排气部件产生的碎片进行了实验研究,提出了爆炸诱发碎片散射范围的预测模型。通过使用自行设计的爆炸试验装置进行实验,发现气体爆炸施加的是准静态压力,在爆燃载荷作用下,排气板被塑性铰链开裂。根据碎片受力和运动方程,通过对散射过程进行微分,提出碎片轨迹预测模型。模型中随机变量的分布由实验数据确定,爆炸碎片的散射范围由蒙特卡罗方法得到。通过将计算结果与三种典型条件下采集的实验数据进行比较,发现模型值与实验值吻合,该模型可以预测碎片的散射范围。所提出的碎片散射预测模型可为用于防止碎片损坏和随后的多米诺效应的工程设计提供参考。该模型可以预测碎片的散射范围。所提出的碎片散射预测模型可为用于防止碎片损坏和随后的多米诺效应的工程设计提供参考。该模型可以预测碎片的散射范围。所提出的碎片散射预测模型可为用于防止碎片损坏和随后的多米诺效应的工程设计提供参考。
更新日期:2020-02-01
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