Offshore Oil Engineering Co., Ltd
SCF（热点应力集中系数）是评估节点疲劳损伤的重要参数。理想状态下，节点的SCF主要受结构形式和受力状态控制。目前，关于海上平台管节点的SCF控制已有大量研究，但非管节点的SCF控制则少有报道。针对这一问题设计了5种浮式平台上部模块非管节点的加强方式，通过有限元软件ANSYS对非管节点进行SCF分析，发现筋板加强可有效改善面外弯矩作用下的应力集中，扣管加强对轴向力、面内弯矩、面外弯矩均具有很好的改善效果。
SCF (hot spot stress concentration factor) is an important parameter to evaluate fatigue strength. In ideal condition, the SCF value of joints mainly controlled by structural form and stress state. At present, there have been a lot of studies on the SCF control of offshored platform tubular joints, but there are few reports on SCF control of non-tubular joints. In present study, five kinds of non-tubular joints are designed. The finite element software ANSYS were used to analysis the SCF of non-tubular joints. It is found that the stiffened plated reinforcement can effectively improve the stress concentration under the action of out of plane bending condition, while the buckle reinforcement has a good effect on the axial force, in-plane bending and out of plane bending conditions.
