Safety assessment of large-scale all steel LNG storage tanks under wind-borne missile impact
Safety assessment of large-scale all steel LNG storage tanks under wind-borne missile impact
复制标题
风载导弹冲击下大型全钢LNG储罐安全评估
DOI：
10.1016/j.tws.2022.109078
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发表时间：
2022-05
影响因子：
6.4
通讯作者：
J G Li
中科院分区：
文献类型：
--
作者：
D L Zou;Y F Hao;H Wu;J G Sun;L Xu;J G Li
关于灾难性后果，规定大型全钢液化天然气（LAS-LNG）储罐的设计应能抵抗风载导弹的潜在影响。本文研究了典型风载导弹意外撞击下LAS-LNG储罐的动力响应和损伤。首先，根据BS 7777和RG 1.76的规范设计了6个重36.5 kg的Schedule 40管道和法兰组件导弹。以300 mm口径单级气炮为基础，进行了导弹打击速度为50 m/s的冲击试验。对充液钢储罐的局部变形和整体响应进行了试验研究。然后，商业有限元（FE）程序LS-DYNA进行数值模拟，考虑流固耦合。通过与试验数据的对比，验证了所采用的数值算法、本构模型及相应参数的正确性。最后，基于验证过的有限元分析方法，针对美国核管理委员会和美国核学会法规指南规定的设计基准风载导弹，RG 1.76、RG 1.221和ANSI/ANS-2.3-2011标准，对中国玉环LAS-LNG储罐原型在风载导弹撞击下的损伤程度进行了数值评估。结果表明，储罐内填充的介质对导弹的撞击具有额外的抵抗作用，目前设计的3枚风载导弹对玉环LNG储罐外罐造成一定的破坏，但内罐的安全性是可以保证的。
Regarding the disastrous consequences, the large-scale all steel liquefied natural gas (LAS-LNG) storage tank is regulated to be designed to resist the potential impact of wind-borne missiles. This paper aims to study the dynamic response and damage of LAS-LNG storage tanks subjected to the accidental typical wind-borne missile impact. Firstly, six Schedule 40 pipe and flange assembly missiles weigh 36.5 kg were designed according to the specifications of BS 7777 and RG 1.76. Based on the 300 mm-caliber single-stage gas gun, the impact test was conducted with a missile striking velocity of 50 m/s. The local deformation and global response of media-filled steel tanks were assessed experimentally. Then, the commercial finite element (FE) program LS-DYNA was utilized to perform the numerical simulations considering the fluid–structure interactions. The adopted numerical algorithm, constitutive models and the corresponding parameters were validated by comparing with the test data. Finally, based on the validated finite element analyses approach, regarding the design-basis wind-borne missiles specified by the regulatory guide of U.S. Nuclear Regulatory Commission and American Nuclear Society, i.e., RG 1.76, RG 1.221 and ANSI/ANS-2.3-2011, the damage levels of the prototype Chinese Yuhuan LAS-LNG storage tank under wind-borne missile impact were assessed numerically. It indicates that the filled media in the tank would provide additional resistance to the missile impact, the present three design-basis wind-borne missiles could bring certain damage to the outer tank of the Yuhuan LNG storage, but the safety of the inner tank can be guaranteed.
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