海洋平台Y型管节点静力强度研究

Study on Static Strength of Y-joint of Offshore Platform

王亮 刘续 李文博

WANG Liang LIU Xu LI Wenbo

中国石油化工股份有限公司上海海洋油气分公司石油工程技术研究院, 上海 200120

Petroleum Engineering Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

在海洋平台结构中，管节点是关键部位。以典型Y型管节点为例，采用有限元法，研究Y型管节点的静力强度。利用ABAQUS建立某海洋平台某Y型管节点有限元模型，通过施加一系列不同的载荷，计算得到Y型管节点失效时所承受的载荷。基于ABAQUS计算该Y型管节点在承受轴向拉伸、平面内弯曲和平面外弯曲载荷时构件发生失效的应力情况，发现构件失效时，所承受的轴向拉伸载荷为1 430 kN，平面内弯曲和平面外弯曲时弯矩载荷分别为37.28 kN·m和17.69kN·m。敏感性研究通过改变弦杆的壁厚，计算得到该Y型管节点在承受外部载荷一系列最大应力和变形值。研究表明，随着弦杆壁厚的增加，Y型管节点的应力和变形值减小。

Tubular joints are the key parts of the offshore platform structures. Taking a typical tubular Y type joint as an example, the finite element method is used to study the static strength of tubular Y type joint. Finite element model for tubular Y type joint is built by using ABAQUS software. By using a series of different loads, the load of Y-joint failure is calculated. The stress of the Y-joint when joint failure occurred under axial tension, in-plane bending and out-of-plane bending are calculated with ABAQUS software. It is found that the axial tensile load is 1 430 kN when joint failure occurred, the in-plane bending and the out-of-plane bending are 37.28 kN·m and 17.69 kN·m respectively. Sensitivity study has been done by changing the wall thickness of the chord, the maximum stress and the deformation of the Y-joint under external load are calculated. The study results show that the stress and deformation of Y-joints decrease with the increase of chord wall thickness.

https://doi.org/10.3969/j.issn.1008-2336.2018.02.111