爆炸碎片撞击下受保护层防护的储罐易损性规律分析

doi:10.16085/j.issn.1000-6613.2020-0209

化工进展 ›› 2020, Vol. 39 ›› Issue (11): 4749-4756.DOI: 10.16085/j.issn.1000-6613.2020-0209

• 化工园区 • 上一篇

爆炸碎片撞击下受保护层防护的储罐易损性规律分析

陈国华¹^,²(), 赵一新¹^,², 周利兴¹^,², 杨棚¹^,², 曾涛¹^,², 赵远飞³

^1.华南理工大学安全科学与工程研究所，广东广州 510641
^2.广东省安全生产科技协同创新中心，广东广州 510641
^3.广东省安全生产科学技术研究院，广东广州 510060

出版日期:2020-11-05 发布日期:2020-11-06
通讯作者: 陈国华
作者简介:陈国华（1967—），男，教授，博士生导师，研究方向为工业安全与风险评价技术、过程装备安全可靠性及风险评价技术。 E-mail：mmghchen@scut.edu.cn。
基金资助:
2019年广东省中央引导地方科技发展专项资金/广东省省级科技计划(2019B020208012);国家自然科学基金(21878102)

Vulnerability analysis of storage tank considering protective layer under impact of blast fragment

Guohua CHEN¹^,²(), Yixin ZHAO¹^,², Lixing ZHOU¹^,², Peng YANG¹^,², Tao ZENG¹^,², Yuanfei ZHAO³

^1.Institute of Safety Science & Engineering, South China University of Technology, Guangzhou 510641, Guangdong, China
^2.Guangdong Provincial Science and Technology Collaborative Innovation Center for Work Safety, Guangzhou 510641, Guangdong, China
^3.Guangdong Academy of Safety Science and Technology, Guangzhou 510060, Guangdong, China

Online:2020-11-05 Published:2020-11-06
Contact: Guohua CHEN

摘要/Abstract

摘要：

储罐保护层是降低化工园区爆炸碎片多米诺效应事故风险的一类关键安全屏障技术。为探讨不同规格的保护层对爆炸碎片引发储罐失效概率的降低程度，建立化工储罐在铝（Al）及超高分子量聚乙烯（ultra-high molecular weight polyethylene，UHMWPE）纤维保护层防护条件下的极限状态方程与破坏失效概率模型，并用Monte-Carlo模拟方法绘制目标储罐受爆炸碎片撞击的易损性曲线，分析不同厚度、材料、层数及耦合方式的保护层对爆炸碎片事故破坏效应的影响规律。结果表明：两种材料的保护层均能显著降低目标储罐受爆炸碎片撞击的破坏失效概率，降低程度均在80%以上；保护层厚度是影响其降低程度的关键因素，在铝质保护层防护下储罐易损性对厚度变化的敏感性大于UHMWPE纤维保护层；对于总厚度相同的铝质保护层，随层数的增加，储罐破坏失效概率逐渐降低；两种材料耦合的多层保护层对储罐失效概率的降低程度大于多层铝质保护层。研究对实际工况中储罐保护层的合理选材与结构设计具有重要参考意义，并可有效提升化工设备韧性。

关键词: 爆炸碎片, 化工储罐, 保护层, 蒙特卡洛模拟, 易损性分析

Abstract:

The protective layer of the storage tank is one key safety barrier technology that reduces the risk of domino effect accident of blast fragments in chemical industry parks. The limit state equation and probability model of chemical storage tank under the protection of Al and ultra-high molecular weight polyethylene (UHMWPE) fiber protective layer were established for the exploration on the reduction degree of failure probability caused by explosion debris with the different protective layer. Monte-Carlo simulation method was used to plot the vulnerability curves of the target tank under these influences. The influence of the protective layer with different thickness, material, layering number and coupling mode on accident effects of blast fragment was analyzed. The results showed that the protective layer of these two materials could significantly reduce the failure probability of the target tank with over 80%. The thickness of the protective layer was the key factor associated to reduction degree. Additionally the vulnerability of the storage tank showed a higher sensitivity to thickness change under the protection of the Al protective layer compared to the UHMWPE fiber protective layer. The failure probability of the tank gradually decreases with the increase of the number of layers when the total thickness of Al protective layers was same. A higher reduction degree of the failure probability was observed by multi-layered protective layer coupled with two materials than single Al. This study can provide an important guidance for rational material selection and structure design of the protective layer for chemical storage tanks in actual working conditions, improving the resilience of chemical process equipment.

Key words: blast fragment, chemical storage tank, protective layer, Monte-Carlo simulation, vulnerability analysis

中图分类号:

TQ086

陈国华, 赵一新, 周利兴, 杨棚, 曾涛, 赵远飞. 爆炸碎片撞击下受保护层防护的储罐易损性规律分析[J]. 化工进展, 2020, 39(11): 4749-4756.

Guohua CHEN, Yixin ZHAO, Lixing ZHOU, Peng YANG, Tao ZENG, Yuanfei ZHAO. Vulnerability analysis of storage tank considering protective layer under impact of blast fragment[J]. Chemical Industry and Engineering Progress, 2020, 39(11): 4749-4756.

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爆炸碎片撞击下受保护层防护的储罐易损性规律分析

Vulnerability analysis of storage tank considering protective layer under impact of blast fragment

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