Challenges with sea ice action on structures for Offshore wind

EU urgently needs to increase the development of secure and green energy, and this includes renewables such as Offshore wind energy. An expansion of Offshore wind will include the Baltic where sea ice is one of the major uncertainties. To ensure that the w ind turbines are safe for people and the environment, while keeping them economically...

Challenges with sea ice action on structuresfor Offshore wind

EU urgently needs to increase the development of secure and green energy, and this includes renewables such as Offshore wind energy. An expansion of Offshore wind will include the Baltic where sea ice is one of the major uncertainties. To ensure that the wind turbines are safe for people and the environment, while keeping them economically...

Corrigendum to “Dynamic response of an offshore structure interacting with an ice floe failing in crushing” (Marine Structures (2019) 65 (271–290), (S0951833918303496), (10.1016/j.marstruc.2019.01.012))

The authors regret their mistake in the definition of the model parameters in Eq. (8) on page 277. The correct equation for the parameter C ₂ is: C2=Ft3/N3vt The authors would like to apologise for any inconvenience caused.

Dynamic response of an offshore structure interacting with an ice floe failing in crushing

Interaction of sea or lake ice with vertically sided offshore structures may result in severe structural vibrations commonly referred to as ice-induced vibrations. With the surge in offshore wind developments in sub-arctic regions this problem has received increased attention over the last decade, whereas traditionally the topic has been mainly...

Ice-induced vibrations of the Norströmsgrund lighthouse

The signature and occurrence of frequency lock-in (FLI) vibrations of full-scale offshore structures are not well understood. Although several structures have experienced FLI, limited amounts of time histories of the responses alongside measured met-ocean data are available in the literature. This paper presents an analysis of 61 measured...

Estimation of the full-field dynamic response of a floating bridge using Kalman-type filtering algorithms

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 through system inversion, combining measured acceleration data with a system model. This article presents a case study of...

Operational modal analysis on a lighthouse structure subjected to ice actions

The sea ice interaction with a structure may cause system changes and affect the feasibility of common approaches to track modal parameters. In this paper, a covariance-driven stochastic subspace identification method is used to identify the natural frequencies from 190 time series of ice actions against a lighthouse structure. The results...