一种卡箍连接器非标准法兰筒体壁厚设计与校核方法

Clamp Connector Non-standard Flange Cylinder Wall Thickness Design and Check Method

跨接管端部的水下连接器是水下油气生产系统的关键连接设备。法兰筒体作为水下连接器密封机构中的关键零部件,其结构强度计算与校核是水下连接器工程设计中的重要环节。以一型卡箍式水下连接器的法兰筒体为研究对象,考虑到其结构属于一种有别于现有规范的非标准法兰结构,提出了一种应力计算和校核的方法,解决了无法直接使用标准规范设计的难题。该方法将法兰筒体简化假设为长梁结构,依据受力特点建立力学分析模型,基于弹性地基梁理论求解剪力和弯矩共同作用下危险截面的等效弯矩,并计算出截面应力分量,建立相应的强度校核准则,以此进行壁厚的设计和计算。该方法的提出和应用是对标准法兰筒体壁厚设计方法的补充,可为同类问题的解决提供参考方案。

The subsea connector across the pipe end of the jumper is the key connecting device for the subsea oil and gas production system.Flange cylinder is a key component in the sealing mechanism of subsea connectors,and its structural strength calculation and verification is an important part in the engineering design of subsea connectors.Taking the flange cylinder structure of a given type of subsea clamp connector as the research object,considering its structure belongs to a non-standard flange from the existing specifications,a stress calculation and strength checking method to solve the problem,which the existing standards and specifications cannot be used directly during the design of the flange cylinder structure was proposed.This method simplifies the flange cylinder into a long beam structure,according to the loading characteristics of the flange cylinder structure,a mechanical analysis model was developed.Based on the elastic foundation beam theory,the equivalent bending moment of the weak cross-section under the combined effect of shear force and bending moment were obtained.The stress components of the weak cross-section were calculated.The strength check criterions were established to design the wall thickness parameters.The application of the developed method is a supplement to the wall thickness design of flange structure in the existing standard and can provide a reference solution for solving similar problems.