Blar i NTNU Open på forfatter "Bachynski, Erin Elizabeth"
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Non-linear hydroelastic response of a monopile foundation in regular waves
Leroy, Vincent; Bachynski, Erin Elizabeth; Gilloteaux, Jean-Christophe; Babarit, Aurelien; Ferrant, Pierre (Peer reviewed; Journal article, 2020)This paper presents an original contribution to the coupled hydroelastic simulation of offshore wind turbines foundations. A non-linear coupled simulation tool has been developed to calculate the response of these systems. ... -
Numerical Analysis of a Floating Wind Turbine - Global Load Effects in the Tower Structure
Espedal, Mikal Hansson (Master thesis, 2016)The OO Star 10 MW is a semi-submersible floater that aims to support a 10 MW wind turbine. It consists of three outer columns with a shaft in the centre. The floater is designed to be built from concrete, and a steel tower ... -
Numerical modeling of the hydraulic blade pitch actuator in a spar‐type floating wind turbine considering fault conditions and their effects on global dynamic responses
Cho, Seongpil; Bachynski, Erin Elizabeth; Rasekhi Nejad, Amir; Gao, Zhen; Moan, Torgeir (Peer reviewed; Journal article, 2020)This paper deals with numerical modeling of the hydraulic blade pitch actuator and its effect on the dynamic responses of a floating spar‐type wind turbine under valve fault conditions. A spar‐type floating wind turbine ... -
Numerical Simulation of Fully Nonlinear Interaction Between Regular and Irregular Waves and a 2D Floating Body
Li, Haoran; Bachynski, Erin Elizabeth (Chapter, 2019)A fully nonlinear Navier-Stokes/VOF numerical wave tank, developed within the open-source CFD toolbox OpenFOAM, is used to investigate the response of a moored 2D floating body to nonlinear wave loads. The waveDyMFoam ... -
Observations from hydrodynamic testing of a flexible, large-diameter monopile in irregular waves
Bachynski, Erin Elizabeth; Thys, Maxime; Hoseini Dadmarzi, Fatemeh (Peer reviewed; Journal article, 2020)As the offshore wind industry moves toward larger wind turbines and deeper water, wave-induced loads on large-diameter monopiles are of increasing importance for ultimate limit state design checks. The combination of a ... -
OC5 Project Phase Ib: Validation of Hydrodynamic Loading on a Fixed, Flexible Cylinder for Offshore Wind Applications
Robertson, Amy N.; Wendt, Fabian; Jonkman, Jason M.; Popko, Wojciech; Borg, Michael; Bredmose, H.; Schlutter, Flemming; Qvist, Jacob; Bergua, Roger; Harries, Rob; Yde, Anders; Nygaard, Tor Anders; De Vaal, Jacobus Bernardus; Oggiano, Luca; Bozonnet, Pauline; Bouy, Ludovic; Barrera Sanchez, Carlos; Garcia, Raul Guanche; Bachynski, Erin Elizabeth; Tu, Ying; Bayati, Ilmas; Borisade, Friedemann; Shin, Hyunkyoung; van der Zee, Tjeerd; Guerinel, Matthieu (Journal article; Peer reviewed, 2016)This paper summarizes the findings from Phase Ib of the Offshore Code Comparison, Collaboration, Continued with Correlation (OC5) project. OC5 is a project run under the International Energy Agency (IEA) Wind Research Task ... -
On Tower Top Axial Acceleration and Drivetrain Responses in a Spar-Type Floating Wind Turbine
Nejad, Amir Rasekhi; Bachynski, Erin Elizabeth; Moan, Torgeir (Chapter; Peer reviewed, 2017)Common industrial practice for designing floating wind turbines is to set an operational limit for the tower-top axial acceleration, normally in the range of 0.2–0.3g, which is typically understood to be related to the ... -
Post‐installation adaptation of offshore wind turbine controls
Smilden, Emil; Sørum, Stian Høegh; Bachynski, Erin Elizabeth; Sørensen, Asgeir Johan; Amdahl, Jørgen (Journal article; Peer reviewed, 2020)The cost of offshore wind energy can be reduced by incorporating control strategies to reduce the support structures' load effects into the structural design process. While effective in reducing the cost of support structures, ... -
Rational upscaling of a semi-submersible floating platform supporting a wind turbine
Leimester, Mareike; Bachynski, Erin Elizabeth; Muskulus, Michael; Thomas, Philipp (Journal article; Peer reviewed, 2016)This work examines the procedure of upscaling of a semi-submersible platform in order to support a predefined wind turbine. As a result of technological progress and design changes, basic scaling based on the turbine rating ... -
Real-time hybrid model testing of a braceless semi-submersible wind turbine. Part I: The hybrid approach
Sauder, Thomas Michel; Chabaud, Valentin Bruno; Thys, Maxime; Bachynski, Erin Elizabeth; Sæther, Lars Ove (Chapter; Peer reviewed, 2016)This article presents a method for performing Real-Time Hybrid Model testing (ReaTHM testing) of a floating wind turbine (FWT). The advantage of this method compared to the physical modelling of the wind in an ocean basin, ... -
Real-time hybrid model testing of a braceless semi-submersible wind turbine. Part II: Experimental results
Bachynski, Erin Elizabeth; Thys, Maxime; Sauder, Thomas Michel; Chabaud, Valentin Bruno; Sæther, Lars Ove (Chapter; Peer reviewed, 2016)Real-Time Hybrid Model (ReaTHM) tests of a braceless semi-submersible wind turbine were carried out at MARINTEK’s Ocean Basin in 2015. The tests sought to evaluate the performance of the floating wind turbine (FWT) structure ... -
Real-time hybrid model testing of floating wind turbines: sensitivity to limited actuation
Bachynski, Erin Elizabeth; Chabaud, Valentin Bruno; Sauder, Thomas Michel (Journal article; Peer reviewed, 2015)Real-time hybrid model testing (ReaTHM) is a new approach for conducting small-scale experimental campaign [1], [2] and [3]. In the case of a floating wind turbine in a wave basin, the aerodynamic loads on the wind turbine ... -
Recent Advances in Integrated Response Analsysis of Floating Wind Turbines in a Reliability Perspective
Moan, Torgeir; Gao, Zhen; Bachynski, Erin Elizabeth; Nejad, Amir R. (Peer reviewed; Journal article, 2020)Offshore wind provides an important source of renewable energy. While wind turbines fixed to the seabed in shallow water have already been industrialized, floating wind turbines are still at an early stage of development. ... -
Reproduction of Monopile Ringing Events in Reduced-Duration Model Tests
Bachynski, Erin Elizabeth; Kristiansen, Trygve (Chapter; Peer reviewed, 2017)Monopile support structures for offshore wind turbines may experience ringing-type responses in steep wave conditions. In order to experimentally capture the statistical distribution of the hydrodynamic loads and structural ... -
Ringing loads on tension leg platform wind turbines
Bachynski, Erin Elizabeth; Moan, Torgeir (Journal article; Peer reviewed, 2014)The present work identifies realistic wave (and associated wind) conditions which could induce ringing responses in tension leg platform wind turbines (TLPWTs). The simulation results show the importance of ringing forces, ... -
Sensitivity Analysis of Limited Actuation for Real-time Hybrid Model Testing of 5MW Bottom-fixed Offshore Wind Turbine
Karimirad, Madjid; Bachynski, Erin Elizabeth (Journal article; Peer reviewed, 2017)The present paper studies the effect of limited actuation for real-time hybrid model testing (ReaTHM® testing) of a bottom-fixed offshore wind turbine in operational, parked, and fault conditions. ReaTHM® testing is a new ... -
Site-specific controller design for monopile offshore wind turbines
Smilden, Emil; Bachynski, Erin Elizabeth; Sørensen, Asgeir Johan; Amdahl, Jørgen (Journal article; Peer reviewed, 2018)The fatigue life of offshore wind turbine (OWT) support structures is sensitive to variations in site-specific conditions such as the water depth and soil properties. Site condtions may vary significantly within a wind ... -
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 ... -
The Effect of Turbulence Model on the Response of a Large Floating Wind Turbine
Eliassen, Lene; Bachynski, Erin Elizabeth (Chapter; Peer reviewed, 2017)The wind turbine design standards advise choosing one of two recommended turbulence models for load simulations of offshore wind turbines. The difference in fatigue loads for the two turbulence models is relatively small ... -
The effects of coherent structures on the global response of floating offshore wind turbines
Bachynski, Erin Elizabeth; Eliassen, Lene (Journal article; Peer reviewed, 2018)The global dynamic response of floating wind turbines is commonly simulated using aero‐hydro‐servo‐elastic tools that consider numerically generated wind files as input. Based on the guidelines given in existing standards, ...