Blar i NTNU Open på forfatter "Rasekhi Nejad, Amir"
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On design, modelling, and analysis of a 10‐MW medium‐speed drivetrain for offshore wind turbines
Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir (Peer reviewed; Journal article, 2020)Utformingen av et drivverk med middels hastighet for 10-MW referanse offshore vindturbin for Danmarks Tekniske Universitet (DTU). Det foreslås en fire-punkts drivlinjeoppsett som er utstyrt med en girkasse med to planetrinn ... -
On Digital Twin Condition Monitoring Approach for Drivetrains in Marine Applications
Johansen, Sigrid S.; Rasekhi Nejad, Amir (Chapter, 2019)A digital twin is a virtual representation of a system containing all information available on site. This paper presents condition monitoring of drivetrains in marine power transmission systems through digital twin approach. ... -
On Disaster Risk Reduction in Norwegian Oil and Gas Industry Through Life-Cycle Perspective
Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir (Chapter, 2019)This paper presents the risk reduction in Norwegian oil & gas industry over the time (1975-2016) through a life cycle perspective analysis with the aim to identify the critical stage(s) both in terms of accident occurrence ... -
On Initial Design and Modelling of a 10 MW Medium Speed Drivetrain for Offshore Wind Turbines
Wang, Shuaishuai; Rasekhi Nejad, Amir; Moan, Torgeir (Journal article; Peer reviewed, 2019)This paper presents the initial design and modelling of a medium speed drivetrain for the DTU 10 MW offshore wind turbine. Design basis and criteria of the drivetrain are described. Minimum weight and volume of the drivetrain ... -
On long-term fatigue damage and reliability analysis of gears under wind loads in offshore wind turbine drivetrains
Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2014)In this paper, a long-term fatigue damage analysis method for gear tooth root bending in wind turbine’s drivetrains is presented. The proposed method is established based on the ISO gear design codes which are basically ... -
On model-based system approach for health monitoring of drivetrains in floating wind turbines
Rasekhi Nejad, Amir; Moan, Torgeir (Journal article; Peer reviewed, 2017)This paper deals with the health monitoring of a wind turbine drivetrain in a system perspective. A 5-MW reference drivetrain installed on a spar type floating wind turbine is selected. Degradation and damage in the main ... -
On Risk of Digital Twin Implementation in Marine Industry: Learning from Aviation Industry
Ibrion, Mihaela; Paltrinieri, Nicola; Rasekhi Nejad, Amir (Journal article; Peer reviewed, 2019)This paper presents some aspects of the risk and challenges associated with digital twin implementation in the marine industry by learning from the aviation industry where the digital twin is more widely employed. The ... -
Statistical fault diagnosis of wind turbine drivetrain applied to a 5MW floating wind turbine
Ghane, Mahdi; Rasekhi Nejad, Amir; Blanke, Mogens; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2016)Deployment of larger scale wind turbine systems, particularly offshore wind turbine, requires more organized operation and maintenance strategies to make it as competitive as the classical electric power stations. It is ... -
Stochastic dynamic load effect and fatigue damage analysis of drivetrains in land-based and TLP, spar and semi-submersible floating wind turbines
Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Kvittem, Marit Irene; Luan, Chenyu; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2015)This paper deals with the feasibility of using a 5 MW drivetrain which is designed for a land-based turbine, on floating wind turbines. Four types of floating support structures are investigated: spar, TLP and two ... -
Structural reliability analysis of contact fatigue design of gears in wind turbine drivetrains
Dong, Wenbin; Rasekhi Nejad, Amir; Moan, Torgeir; Gao, Zhen (Peer reviewed; Journal article, 2020)Advances in the design of large scale wind turbines have raised an interest for more optimized life cycle design of mechanical components (e.g. gears, bearings, shafts, etc.), with a better understanding of their performance ... -
Team and Research Based Learning Methods Applied in Multidisciplinary Marine Engineering Education
Rasekhi Nejad, Amir; Aoyanagi, Yuriko; Ibrion, Mihaela (Journal article; Peer reviewed, 2019)This paper presents an integrated team-based, and research-based learning approach utilized in lecturing multidisciplinary marine engineering courses. The approach is exemplified during one month Ocean Engineering Summer ...