关键词: 堆码, 特征值屈曲, 强度, LNG, 有限元

Abstract: Taking LNG tank containers as research objects, the strength reserve and displacement field of the tank were given by establishing its finite element model under stacking test conditions. The stacking buckling of the tank frame structure under multiple real loads was analyzed and calculated by using the Block Lanczos method, and the buckling modes of the frame and the corresponding critical loads were given. The strength distribution, the weakness, stability modes and macro stability reserves of the tank structure were clarified. It was concluded that the weak parts of the tank under stacking test conditions were upper frame short section and connection between frame and tank. The upper frame short section was the preferred location for stiffness reinforcement. In addition,the analysis shows that the stability of the tank frame is high and strength is the primary consideration in the design of this type of tank frame. This paper provided a reference for the design and check of the strength and stability of similar structures.

Key words: Stacking, Eigenvalue buckling, Strength, LNG, Finite element