油罐壁板与底板的联接区域(下节点)是油罐易于发生破坏的部位。其主要原因之一是该处的应力大。为了防止油罐在下节点处发生破坏,人们从焊接方面做了大量工作。本文讨论了底板凸出壁板长度、底板厚度等因素对下节点应力的影响,从中找出降低下节点应力、提高油罐寿命的方法。 The joint area between tank wall and floor (bottom node) is where the tank is prone to damage. One of the main reasons is that there is a lot of stress. In order to prevent damage to the tank at the next node, a great deal of work has been done on welding. In this paper, the influence of the protruding plate length of the soleplate, the thickness of the soleplate and other factors on the stress of the lower joint is discussed, and the method of reducing the stress of the lower joint and the service life of the oil tank is found.