In the light of the top unstability of oil tank,an analysis on the structures of spherical shell and stiff-ener is carried out from the reason influencing the stability of tank top and calculation.

• 针对油罐罐顶的失稳问题,从影响罐顶稳定性的原因和校核两个方面,对光球壳和加筋球壳两种罐顶结构进行了分析。