Safety influence of lightning-induced secondary spark discharge on oil tanks area

In order to research the safety influence of lightning-induced secondary spark to oil/gas in oil tanks area, the models of lightning, oil tank and steel bar on the roof are set up in HFSS according to the reality of Huangdao fire accident, and the distribution of induction fields in the steel bar is calculated. Then, the field intensity to distance curve is drawn, and the formulas of its fitting curve and envelope curve are achieved, which provided advices and theoretical basis to the division of safety distance and the protection of lightning induced electromagnetic interference.