Study on hot spot stress of three-planar tubular Y-joints under combined axial loads

被引：25

作者：

Bao, Shiliu ^{[1
]}

Li, Xin ^{[1
]}

Wang, Bin ^{[2
]}

机构：

[1] Dalian Univ Technol, Fac Infrastruct Engn, Dalian, Peoples R China

[2] Powerchina Huadong Engn Corp Ltd, Renewable Energy Engn Inst, Hangzhou, Zhejiang, Peoples R China

来源：

THIN-WALLED STRUCTURES | 2019年 / 140卷

基金：

中国国家自然科学基金;

关键词：

Offshore wind turbine; Fatigue; Tubular joint; Stress concentration; Multi-planar interaction; K-JOINTS; SCF DISTRIBUTION; CENTRAL BRACE; PARAMETRIC EQUATIONS; WELD TOE; DESIGN; PREDICTION; DISTRIBUTIONS;

D O I：

10.1016/j.tws.2019.03.025

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Offshore wind turbines (OWT) tripod substructures are widely used in China; their weakest components are three-planar circular hollow section (CHS) tubular Y-joints that can lead to their fatigue failure. In this study, finite element (FE) models are established to calculate the geometric stress distribution along the weld toe of these joints. The multi-planar interaction factor (MIF) is defined to quantify the multi-planar effect. According to the results of the FE models, the stress concentration factors (SCFs) and MIFs along the weld of three-planar tubular Y-joints under an axial load are obtained. After a geometric parameter investigation and numerous nonlinear regression analyses, a set of parametric equations for extreme values of the SCF and MIF is derived. The proposed equations satisfy the acceptance criteria of the UK Department of Energy.

引用

页码：478 / 494

页数：17

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