A time-domain fatigue damage assessment approach for the tripod structure of offshore wind turbines

F Lu, K Long, Y Diaeldin, A Saeed, J Zhang… - … Energy Technologies and …, 2023 - Elsevier
Welded features in the tubular joints are one of the most severe sources of fatigue failure in
supporting structure for offshore wind turbines (OWTs). Therefore, fatigue resistance …

Stress concentration factors in tubular T-joints reinforced with external ring under in-plane bending moment

H Nassiraei, P Rezadoost - Ocean Engineering, 2022 - Elsevier
The stress concentration factors (SCFs) in tubular T-joints reinforced with external ring under
in-plane bending (IPB) moment are investigated. After validation of the FE model with …

The effect of multi-planarity on the SCFs in offshore tubular KT-joints subjected to in-plane and out-of-plane bending loads

H Ahmadi, E Zavvar - Thin-Walled Structures, 2016 - Elsevier
The majority of tubular joints commonly found in offshore practice are multi-planar.
Investigating the effect of loaded out-of-plane braces on the values of the stress …

Stress concentration factors induced by out-of-plane bending loads in ring-stiffened tubular KT-joints of jacket structures

H Ahmadi, E Zavvar - Thin-Walled Structures, 2015 - Elsevier
In the present paper, data extracted from the finite element analysis of 118 models, which
were validated against the test results obtained from an experimental study, were used to …

Development of a probability distribution model for the SCFs in tubular X-connections retrofitted with FRP

H Nassiraei, P Rezadoost - Structures, 2022 - Elsevier
In this study, results of performing 324 FE analyses on 108 circular hollow section (CHS) X-
connections with fiber reinforced polymer (FRP) have been used to derive a probability …

Probabilistic analysis of stress concentration factors in tubular KT-joints reinforced with internal ring stiffeners under in-plane bending loads

H Ahmadi, A Yeganeh, AH Mohammadi, E Zavvar - Thin-Walled Structures, 2016 - Elsevier
In the present research, results from the finite element (FE) stress analysis of 108 models,
validated using test data obtained from the experimental investigation, was used to propose …

Modeling stress concentration factors for fatigue design of KT-joints subjected to in-plane bending loads using artificial neural networks

M Iqbal, S Karuppanan, V Perumal… - … Research in Africa, 2024 - Trans Tech Publ
Stress concentration factor (SCF) is an important parameter for the fatigue design of offshore
joints. There are many empirical equations for quick estimation of SCF in tubular joints …

A probability distribution model for SCFs in internally ring-stiffened tubular KT-joints of offshore structures subjected to out-of-plane bending loads

H Ahmadi - Ocean Engineering, 2016 - Elsevier
The stress concentration factor (SCF) is one of the principal inputs in the fatigue reliability
analysis of tubular joints. The SCF shows substantial scatter that highlights the necessity of …

Stress concentration due to in-plane bending (IPB) loads in ring-stiffened tubular KT-joints of offshore structures: Parametric study and design formulation

H Ahmadi, MA Lotfollahi-Yaghin - Applied Ocean Research, 2015 - Elsevier
Although tubular KT-joints are commonly found in offshore jacket structures and despite the
crucial role of stress concentration factors (SCFs) in the evaluation of the tubular joint's …

Fatigue reliability assessment method for wind power gear system based on multidimensional finite element method

M Li, Y Luo, L Xie, C Tong… - … Part O: Journal of Risk and …, 2024 - journals.sagepub.com
As a core strategic technology industry, the wind power plays an important role in protecting
national energy reserves. The large gear component is one of the core foundation parts in …