Browsing NTNU Open by Author "Lourens, Eliz-Mari"
Now showing items 1-13 of 13
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Design of Monopile Foundations to Support the DTU 10 MW Offshore Wind Turbine
Velarde, Joey (Master thesis, 2016)Further advancements in the offshore wind industry, which come with the use of larger wind turbines at deeper water, require larger support structures. For shallow and intermediate water depths, monopile foundations still ... -
Efficient rotor modelling for real-time hybrid testing
Yu, Jingyi (Master thesis, 2017)Small-scale model tests in wave basins are important tools for validating numerical tools, evaluating system performance, and studying physical phenomena related to floating wind turbines. Hydrodynamic tests generally ... -
Estimation of the dynamic response of a slender suspension bridge using measured acceleration data
Petersen, Øyvind Wiig; Øiseth, Ole; Lourens, Eliz-Mari (Journal article; Peer reviewed, 2017)Suspension bridges with very long spans and slender designs are susceptible to large-amplitude dynamic excitation. Monitoring systems installed on bridges can provide measurement data (e.g. accelerations) and therewith ... -
Estimation of the full-field dynamic response of a floating bridge using Kalman-type filtering algorithms
Petersen, Øyvind Wiig; Øiseth, Ole; Nord, Torodd Skjerve; Lourens, Eliz-Mari (Journal article; Peer reviewed, 2018)Numerical predictions of the dynamic response of complex structures are often uncertain due to uncertainties inherited from the assumed load effects. Inverse methods can estimate the true dynamic response of a structure ... -
Evaluation of the Fatigue Resistance of Offshore Jacket Joints by Numerical Approaches
Mendoza Espinosa, Jorge (Master thesis, 2017)Jacket support structures are a preferred solution for offshore wind turbines in deeper waters. Extensive knowledge exists in relation to its construction technique as well as its crucial components, but due to considerable ... -
Examination of environmental lumping methods for fatigue assessment of floating wind turbines
Henskens, Aaron (Master thesis, 2023)Flytende turbiner utgjør et nytt forskningsfelt innenfor havvind, en ung bransje i seg selv. Etterspørselen etter havvindturbiner vil sannsynligvis øke betydelig i de kommende tiårene. Mens bunnfaste turbiner generelt er ... -
Force identification and response estimation in floating and suspension bridges using measured dynamic response
Petersen, Øyvind Wiig (Doctoral theses at NTNU;2019:88, Doctoral thesis, 2019)The trend of constructing bridges that are longer, more slender, and more flexible increases the importance of the assessment of dynamic behavior. Herein, it is imperative to have a good understanding of the environmental ... -
Full-scale identification of the wave forces exerted on a floating bridge using inverse methods and directional wave spectrum estimation
Petersen, Øyvind Wiig; Øiseth, Ole; Lourens, Eliz-Mari (Journal article; Peer reviewed, 2019)The dynamic behaviour of long-span bridges is governed by stochastic loads from typically ambient excitation sources. In real life, these loads cannot be measured directly at full scale. However, inverse methods can be ... -
Inverse identification of buffeting and self-excited wind loads on the {Hardanger} bridge from acceleration data
Petersen, Øyvind Wiig; Øiseth, Ole Andre; Nord, Torodd Skjerve; Lourens, Eliz-Mari (Chapter, 2019)The traditional wind load assessment for long-span bridges rely on assumed models for the wind field and aerodynamic coefficients from wind tunnel tests, which usually introduces some uncertainties. It is therefore desired ... -
Investigation of dynamic wind loads on a long-span suspension bridge identified from measured acceleration data
Petersen, Øyvind Wiig; Øiseth, Ole Andre; Lourens, Eliz-Mari (Journal article; Peer reviewed, 2020)The traditional wind load assessment for long-span bridges relies on assumed models for the wind field and aerodynamic coefficients from wind tunnel tests, which usually introduce some uncertainties. Recent studies have ... -
Monitoring of Fatigue Damage for Offshore Wind Turbine Foundations - Investigating Operation Strain Estimation Techniques
Norbruis, Joris Obbe (Master thesis, 2017)A global focus on the shift to renewable energy has introduced international targets for sustainable energy production, which have strongly increased the interest in offshore wind turbines (OWT s). In order to make offshore ... -
Optimizing the Structural Lifetime of Monopile-based Offshore Wind Turbines with Genetic Algorithms: Is it worth planning for Lifetime Extension?
Rhomberg, Matthieu Benoit (Master thesis, 2017)Optimization of structures in a domain with large uncertainties is rather difficult. This also applies for the offshore wind energy sector. For current offshore wind energy development locations with monopile-based support ... -
Stress analysis of a monopile foundation under the hammering loads
Xu, Rui (Master thesis, 2017)The installation of monopile is a very important process in offshore wind turbine construction. Duringthemonopilebeingdrivendownbyhydraulichammer,hugeenergytransfersfromham mer to pile, which may cause monopile inclination. ...