Based the numerical simulation for sphere tank with defects, fracture safety assessment and stress strength verification are done under the cases of working pressure and over pressure.
在数值模拟计算含缺陷球罐应力场的基础上，对含缺陷球罐在工作压力和超压两种工况下进行了断裂安全评定和强度校核。
This paper evaluates the surplus service life of the liquefied natural gas tank by analysis of fracture mechanics, and offers the basis for the safety assessment of welding defects of the gas tank.
文对卧式液化储气罐的焊接缺陷用断裂力学的分析方法，评定了其剩余使用寿命，对大修中储气罐焊接缺陷的安全评定提供了依据。
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