火灾中大型LNG储罐内爆失效特性及其碎片飞散研究  

Study on implosion failure characteristics and debris flight of large LNG storage tanks in fire

作　　者：欧阳的华 李艳艳[1] 宋梦瑶 刘星雨 史红星 OUYANG Dihua;LI Yanyan;SONG Mengyao;LIU Xingyu;SHI Hongxing(Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China;不详)

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]国民核生化灾害防护国家重点实验室,北京102205

出　　处：《工业安全与环保》2024年第9期23-27,共5页Industrial Safety and Environmental Protection

基　　金：国民核生化灾害防护国家重点实验室科研项目(SKLNBC2021-22)。

摘　　要：建立大型LNG储罐的三维模型,采用有限元相容拉格朗日-欧拉(CLE)方法和流固耦合相互作用(FSI)原理,讨论储罐暴露在800℃环境中罐内不同位置发生内爆的破裂失效情况,分析其碎片的飞散特性,得到顶部爆炸的初速是罐中爆炸初速的1.57倍,质量均值相差约52%;根据碎片的飞散轨迹可以得到碎片的飞散落地距离在50 m内,研究结果可为大型LNG储罐的安全防护设计与罐区的安全距离提供一定参考依据。This paper establishes a three-dimensional model of a large LNG storage tank by using the finite element compatible Lagrange-Euler(CLE)method and fluid-structure coupling interaction(FSI)principle.The failure of implosion occurred in different positions of the tank exposed to 800℃is discussed.The flying characteristics of the fragments are analyzed.The initial velocity of the top explosion is 1.57 times of the initial velocity of the tank explosion,and the mean mass difference is about 52%.According to the flight trajectory diagram of debris,it can be concluded that the flight landing distance of debris is within 50 m.The research results can provide a certain reference for the safety protection design of large LNG storage tanks and the safety distance of tank farms.

关 键 词：液化天然气(LNG)储罐 多相荷载 损伤失效 数值模拟 破裂碎片特性 

分 类 号：TE972[石油与天然气工程—石油机械设备]