摘要
为分析在雷击浮顶油罐附近地面时油罐感应的强电磁过程,建立了基于时域有限差分法的油罐感应雷分析模型,计算了雷击浮顶油罐附近地面时浮顶与罐壁间空气间隙的电场强度分布和雷电电场的辐射强度,分析了雷电流幅值、雷击距离和土壤电阻率对电场强度的影响.结果表明,浮顶与罐壁间空气间隙的感应电场强度随雷电流幅值和土壤电阻率的增加而增大,随雷击距离增加而减小;对于幅值30kA的雷电流,当雷击距离小于30m时油罐将隐含起火爆炸的可能性,当雷击距离小于1.2km时将可能损坏安装于油罐的电子设备.
In order to investigate the electromagnetic process of floating roof oil tanks struck by indirect lightning,a numerical model based on the finite difference time domain（FDTD）method was proposed to analyze the electric potential distribution between floating roof and tank wall when lightning struck the ground near oil tanks.The radiation power caused by lightning discharge was calculated.The impacts of the amplitude of lightning current,strike position and soil resistivity on electric potential distribution were investigated.The results show that the electric field strength between floating roof and tank wall increases with the amplitude of lightning current and soil resistivity,and decays as the strike distance increases.A lightning current amplitude of 30 kA is likely to ignite fire to floating oil tanks if strike distance is less than30 m.When the strike distance is less than 1.2km,the electronic equipment on oil tanks may be destroyed.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2016年第6期819-824,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金项目(51577117)
化学品安全控制国家重点实验室基础研究项目(SKL005)资助
关键词
浮顶油罐
感应雷
时域有限差分法
电场强度
辐射强度
floating roof oil tank
indirect lightning
finite difference time domain（FDTD）method
field intensity
radiation power
