为预测具有弱顶结构的立式拱顶油罐发生爆炸时外场超压强度,对油罐库区安全规程制定提供一定参考，采用模拟比例法和TNO多能法对3 000 m3弱顶结构立式拱顶油罐内部爆炸时外场空间冲击波超压值进行了预测,且针对TNO多能法在使用时选择爆炸初始强度的主观性和盲目性问题,提出了用模拟实验的方法来确定爆炸初始强度的新思路。通过模拟实验并依据TNO多能法比例距离计算公式,将实验值换算为相应3 000 m3弱顶结构立式拱顶油罐外场空间实际距离处的爆炸超压值,其值与TNO多能法评估结果近似。说明通过模拟实验确定爆炸初始等级后的TNO多能法预测结果较为准确,而模拟比例法只适合评估油罐外较近距离处的爆炸超压,当3 000 m3弱顶结构立式拱顶油罐在半罐储油条件时,对应TNO多能法爆炸初始等级为5级。通过对弱顶结构立式拱顶油罐爆炸超压进行评估，为油库罐区安全距离设计和事故应急预案制定提供参考。

In order to predict the external overpressure strength of vertical doom-roof oil tank during explosion and provide reference for safety regulation in tank farm, the external field overpressure produced by the3000 m3oil tank internal explosion is estimatedby simulation scale method and TNO multi-energy method. And aimed at the subjectivity and the blindness of selecting the initial explosion intensity of multi-energy method, a new idea is brought up which is based on experiment to decide the initial explosion intensity. At the same time, the experimental value can be converted to the3000 m3oil tankexternal field overpressure value at corresponding positions by multi-energy method’s scaled distance equation, which is similar to the results of TNO multi-energy method. It is indicated that the prediction by TNO multi-energy method is accurate, while the simulation scale method is only suitable to estimate the overpressure field closed to the tank. When the oil storage condition is half of the 3 000 m3vertical tank, the initial explosion intensity to TNO multi-energy method is level 5.