Blar i NTNU Open på forfatter "Bachynski, Erin Elizabeth"
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Dynamic Response of A Large-Diameter Monopile Considering 35-Hour Storm Conditions
Bachynski, Erin Elizabeth; Page, Ana M.; Katsikogiannis, George (Journal article; Peer reviewed, 2019)As a part of the assessment of foundation resistance for monopiles, several offshore wind standards prescribe symmetric 35-hour (or 42-hour) storm sequences in terms of wind speed and significant wave height. The temporal ... -
Dynamic response of a monopile wind turbine in waves: Experimental uncertainty analysis for validation of numerical tools
Bachynski, Erin Elizabeth; Thys, Maxime; Delhaye, Virgile Roger (Journal article; Peer reviewed, 2019)The responses of a monopile offshore wind turbine subjected to irregular wave loads are investigated numerically and experimentally, considering a range of sea states. An extensive experimental campaign was carried out on ... -
Dynamic responses of a jacket-type offshore wind turbine using decoupled and coupled models
Ong, Muk Chen; Bachynski, Erin Elizabeth; Økland, Ole David; Passano, Elizabeth Anne (Chapter, 2014)This paper presents numerical studies of the dynamic responses of a jacket-type offshore wind turbine using both decoupled and coupled models. In the decoupled (hydroelastic) model, the wind load is included through ... -
Effect of environmental modelling and inspection strategy on the optimal design of floating wind turbines
Hegseth, John Marius; Bachynski, Erin Elizabeth; Leira, Bernt Johan (Peer reviewed; Journal article, 2021)In order to reduce design conservatism and consequently the cost of energy, appropriate and cost-optimal safety factors should be derived, in light of environmental load uncertainties and lifetime costs. In the present ... -
Effects of bedplate flexibility on drivetrain dynamics: Case study of a 10 MW spar type floating wind turbine
Wang, Shuaishuai; Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Moan, Torgeir (Peer reviewed; Journal article, 2020)This paper deals with the effect of bedplate flexibility on drivetrain dynamics of a 10 MW spar type floating wind turbine. The 10 MW drivetrain bedplate is designed based on extreme design loads and ultimate limit state ... -
Effects of hull flexibility on the structural dynamics of a TLP floating wind turbine
Souza, Carlos Eduardo Silva de; Bachynski, Erin Elizabeth (Journal article; Peer reviewed, 2019)Dynamic analysis of floating wind turbines often considers the hull as a rigid body. This paper explores the consequences of modeling the pontoons of a tension leg platform (TLP) wind turbine as flexible beams. The analysis ... -
Environmental lumping for efficient fatigue assessment of large-diameter monopile wind turbines
Katsikogiannis, George; Sørum, Stian Høegh; Bachynski, Erin Elizabeth; Amdahl, Jørgen (Peer reviewed; Journal article, 2021)Fatigue damage is one of the governing factors for the design of offshore wind turbines. However, the full fatigue assessment is a time-consuming task. During the design process, the site-specific environmental parameters ... -
Experimental and numerical investigation of nonlinear diffraction wave loads on a semi-submersible wind turbine
Li, Haoran; Bachynski, Erin Elizabeth (Peer reviewed; Journal article, 2021)In a severe sea state, nonlinear wave loads can excite resonant responses of floating wind turbines either at high (structural) or low (rigid body motions) natural frequencies. In the present work, a computational fluid ... -
Experimental and numerical investigations of monopile ringing in irregular finite-depth water waves
Bachynski, Erin Elizabeth; Kristiansen, Trygve; Thys, Maxime (Journal article; Peer reviewed, 2017)In storm conditions, nonlinear wave loads on monopile offshore wind turbines can induce resonant ringing-type responses. Efficient, validated methods which capture such events in irregular waves in intermediate or shallow ... -
Experimental results of a multimode monopile offshore wind turbine support structure subjected to steep and breaking irregular waves
Suja-Thauvin, Loup; Krokstad, Jørgen R; Bachynski, Erin Elizabeth; de Ridder, Erik-Jan (Journal article; Peer reviewed, 2017)We present experimental data from MARIN on a bottom-fixed offshore wind turbine mounted on a monopile in intermediate water depth subjected to severe irregular wave conditions. Two models are analysed: the first model is ... -
Experimental validation of a time-domain approach for determining sectional loads in a floating wind turbine hull subjected to moderate waves
Luan, Chenyu; Chabaud, Valentin Bruno; Bachynski, Erin Elizabeth; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)To achieve cost-effective and reliable structural design of floating wind turbines, efficient and accurate time domain numerical approaches are required to analyse structural responses in design conditions, e.g. wind and ... -
Fatigue Damage Comparison of Mechanical Components in a Land-based and a Spar Floating Wind Turbine
Rasekhi Nejad, Amir; Bachynski, Erin Elizabeth; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2015)This paper investigates the fatigue damage of the gears and bearings in a land-based and a spar-type floating wind turbine. The reference 5 MW NOWITECH gearbox is used on a land-based and a floating spar wind turbine. ... -
Fatigue sensitivity to foundation modelling in different operational states for the DTU 10MW monopile-based offshore wind turbine
Katsikogiannis, George; Bachynski, Erin Elizabeth; Page, Ana M. (Journal article; Peer reviewed, 2019)The importance of foundation modelling for the support-structure fatigue damage estimation of a 10 MW monopile based offshore wind turbine is investigated in different operational states and wind-wave misalignment conditions. ... -
Frequency-Dependent Aerodynamic Damping and Inertia in Linearized Dynamic Analysis of Floating Wind Turbines
Silva de Souza, Carlos Eduardo; Hegseth, John Marius; Bachynski, Erin Elizabeth (Journal article; Peer reviewed, 2020)In frequency-domain (FD) models of floating wind turbines (FWT), it is common to regard the interaction between nacelle motions and thrust by means of a constant aerodynamic damping coefficient. This approach is effective ... -
Hydrodynamic Modeling of Tension Leg Platform Wind Turbines
Bachynski, Erin Elizabeth; Moan, Torgeir (Chapter, 2013)In order to compute the system response of tension leg platform wind turbines (TLPWTs), it is important to accurately capture the hydrodynamic loading not only at the wave frequency, but also in the low (difference) and ... -
Integrated design optimization of spar floating wind turbines
Hegseth, John Marius; Bachynski, Erin Elizabeth; Martins, Joaquim R. R. A. (Peer reviewed; Journal article, 2020)A linearized aero-hydro-servo-elastic floating wind turbine model is presented and used to perform integrated design optimization of the platform, tower, mooring system, and blade-pitch controller for a 10 MW spar floating ... -
Key Contributors to Lifetime Accumulated Fatigue Damage in an Offshore Wind Turbine Support Structure
Smilden, Emil; Bachynski, Erin Elizabeth; Sørensen, Asgeir Johan (Chapter; Peer reviewed, 2017)A simulation study is performed to identify the key contributors to lifetime accumulated fatigue damage in the support-structure of a 10 MW offshore wind turbine placed on a monopile foundation in 30 m water depth. The ... -
LFCS Review report – Environmental loads Methods for the estimation of loads on large floating bridges
Fonseca, Nuno; Bachynski, Erin Elizabeth (Research report, 2018)The document presents a review of state-of-the-art methods to calculate environmental loads on large floating bridges. It is a deliverable from WP2 of the Design and verification of Large Floating Costal Structures (LFCS) ... -
Modeling of a semisubmersible floating offshore wind platform in severe waves
Rivera-Arreba, Irene; Bruinsma, Niek; Bachynski, Erin Elizabeth; Viré, Axelle; Paulsen, Bo T.; Jacobsen, Niels G. (Journal article; Peer reviewed, 2019)Floating offshore wind platforms may be subjected to severe sea states, which include both steep and long waves. The hydrodynamic models used in the offshore industry are typically based on potential-flow theory and/or ... -
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. ...