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Complex but Negligible: Non-Linearity of the Inertial Coupling between the Platform and Blades of Floating Wind Turbines

Approximate linearised models can be important for preliminary design of floating wind turbines, but their value depends on how well they approximate the real-world non-linear behaviour. This paper focuses on the non-linear inertial coupling between …

Improved Linearised Models of Wind Turbine Aerodynamics and Control System Dynamics Using Harmonic Linearisation

Where non-linearities are not too strong, linearised frequency-domain approaches offer fast calculations, which can be valuable for preliminary design of wind turbine blades, foundations and floating platforms. But the aerodynamic and control system …

Incremental Material Flow Analysis with Bayesian Inference

Material flow analysis (MFA) is widely used to study the life cycles of materials from production, through use, to reuse, recycling, or disposal, in order to identify environmental impacts and opportunities to address them. However, development of …

Hybrid Sankey Diagrams: Visual Analysis of Multidimensional Data for Understanding Resource Use

Sankey diagrams are used to visualise flows of materials and energy in many applications, to aid understanding of losses and inefficiencies, to map out production processes, and to give a sense of scale across a system. As available data and models …

Scaling of Slow-Drift Motion with Platform Size and Its Importance for Floating Wind Turbines

Slow drift is a large, low-frequency motion of a floating platform caused by nonlinear hydrodynamic forces. Although slow drift is a well-known phenomenon for ships and other floating structures, new platforms for floating wind turbines are …

Characterising Dynamic Non-Linearity in Floating Wind Turbines

Fully coupled aero-hydro-control-elastic codes are being developed to cope with the new modelling challenges presented by floating wind turbines, but there is also a place for more efficient methods of analysis. One option is linearisation and …