大型导管架分片吊装用管式吊点设计与强度校核

Design and Related Strength Check on Tubular Hanging Points Used for Large Lifting Jacket Modular

管式吊点是导管架分片总装过程中用于平吊与翻身作业的重要附属结构，合理的吊点设计直接决定吊装作业的安全性。从结构型式、布置要求、规格、材质及焊接要求等几个方面，概述了管式吊点的基本设计原则。根据吊点的受力状况，提出吊点管轴强度校核及焊缝截面应力的计算方法，并对吊点焊接位置处母材的局部应力进行了有限元分析。该理论计算与有限元分析相结合的方法已普遍应用于荔湾3．1导管架项目中管式吊点的设计，吊装实践证明该方法是安全可行的。

Tubular hanging points are important attached structures used for level lifting and turning operations in the process of jacket modular assembly. Reasonable design of hanging points determines the security of lifting operations directly. Basic design principles on structure type, layout requirement, specification, material and welding requirement are summarized. According to the stress state of hanging points, methods to check strength of the tube and calculation of stress at weld seam cross section are presented. Besides, finite element analysis on local stress of the base material at the welding position is made. The approach that theory algorithm is combined with finite element analysis has been widely used to the design of tubular hanging points for LW3-1 jacket project, and lifting practices have proved that the method is safe and feasible.