Searched for: subject:"ice"
(1 - 20 of 100)

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Xu, Z. (author)
In the 21st century, polar land ice melting became one of the driving factors of global sea level rise, which is discussed widely by the media and the public. Although the fact of the shrinking ice caps and accompanying changes in the sea level is established, the actual amount of polar ice melting still needs to be quantified in separate...
doctoral thesis 2019
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Tautz-Weinert, Jannis (author), Yürüşen, Nurseda Y. (author), Melero, Julio J. (author), Watson, S.J. (author)
Commercial operation and maintenance of wind farms always involves trying to find the most cost-effective solution from various possible options. In this paper, a maintenance action within a Spanish wind farm was studied, whereby a blade replacement was required to prevent catastrophic failure. The conducted replacement was accompanied by an...
journal article 2019
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Bamber, Jonathan L. (author), Oppenheimer, Michael (author), Kopp, Robert E. (author), Aspinall, Willy (author), Cooke, R.M. (author)
Despite considerable advances in process understanding, numerical modeling, and the observational record of ice sheet contributions to global mean sea-level rise (SLR) since the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change, severe limitations remain in the predictive capability of ice sheet models. As a...
journal article 2019
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Hendrikse, H. (author), Koot, Jasper (author)
Ice-induced vibrations have to be considered in the design of vertically sided offshore structures which may encounter drifting sea or lake ice during their lifetime. One particular aspect is the contribution of ice-induced vibrations to the fatigue of such structures. Estimation of the duration of events is often difficult, due to limited...
conference paper 2019
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Nord, Torodd Skjerve (author), Petersen, Oyvind (author), Hendrikse, H. (author)
Identifying the modal parameters of structures located in ice-infested waters may be challenging due to the interaction between the ice and structure. In this study, both simulated data from a state-of-the-art ice–structure interaction model and measured data of ice–structure interaction were both used in conjunction with a covariance-driven...
journal article 2019
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Datta, Rajashree Tri (author), Tedesco, Marco (author), Fettweis, Xavier (author), Agosta, Cecile (author), Lhermitte, S.L.M. (author), Lenaerts, Jan T M (author), Wever, Nander (author)
Surface meltwater ponding has been implicated as a major driver for recent ice shelf collapse as well as the speedup of tributary glaciers in the northeast Antarctic Peninsula. Surface melt on the NAP is impacted by the strength and frequency of westerly winds, which result in sporadic foehn flow. We estimate changes in the frequency of foehn...
journal article 2019
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Abramian, A. (author), Vakulenko, SA (author), van Horssen, W.T. (author)
In this paper, a new simple oscillator model is considered describing ice-induced vibrations of upstanding, water-surrounded, and bottom-founded offshore structures. Existing models are extended by taking into account deformations of an ice floe and a moving contact interaction between an ice rod, which is cut out from the floe, and the...
journal article 2019
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Hassan, A.M. (author), Ayoub, M. (author), Eissa, M. (author), Musa, Tagwa (author), Bruining, J. (author), Zitha, P.L.J. (author)
This paper deals with on line viscosity measurements using integrated circuit technology, and is building on a previous paper on the use radio frequency identifier (RFID) technology for determining dielectric coefficients. It is asserted that the progress in RFID technology and integrated circuits, in particular in micro–electro–mechanical...
journal article 2019
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Gedikli, Ersegun Deniz (author), Nord, Torodd Skjerve (author), Hendrikse, H. (author), Ziemer, Gesa (author)
Pressures at the ice-structure interface during model-scale ice-structure interaction are often measured with tactile sensors. Resulting datasets usually include large volume of data along with some measurement error and noise; therefore, it is inherently hard to extract the hidden fluctuating pressures in the system. Identifying the...
journal article 2019
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Owen, C.C. (author), Hendrikse, H. (author)
For the design of offshore structures in regions with ice-infested waters, the prediction of interaction between ice floe and support structure is essential. If the structure is vertically sided at the ice-structure interface, then ice-induced vibrations can develop. Recently, a dynamic icestructure interaction model has been developed and...
conference paper 2019
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Keijdener, C. (author), Hendrikse, H. (author), Metrikine, A. (author)
In this paper, the efficacy of an effective fluid model (EFM) is studied for replicating the effects that hydrodynamics has on the interaction between level ice, modeled as a semi-infinite Kirchhoff-Love plate, and a downward sloping structure, modeled as a rigid and immobile body. The proposed EFM is based on a distributed frequency-independent...
conference paper 2019
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Willems, Tom (author), Hendrikse, H. (author)
Offshore wind turbines at locations where sea or lake ice is present need to be designed to withstand ice-induced loading. For vertical-sided support structures, such as monopiles, the effects of ice-induced vibrations need to be considered in the design. Current practice is either to use approaches provided in design standards, or for example...
conference paper 2019
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Hendrikse, H. (author)
The second edition of the ISO19906 design standard contains changes in the informative appendix concerning dynamic ice actions. Challenges in application of the previous approach and advances in understanding of the dynamic ice-structure interaction process were the main motivation for the revision. The new guideline provides relevant...
conference paper 2019
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Bridges, Robert (author), Riska, K.A. (author), Hopkins, Mark (author), Wei, Ying (author)
Ice encroachment is the accumulation of ice atop a platform and results when ice drifts against a platform. Most often this occurs in shallow water but in principle can occur in deep water if the ice drift length is long enough. As the ice drifts against the platform it is broken and generates rubble and ice piles in front of the platform, and...
journal article 2019
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Lenaerts, J.T.M. (author), Medley, Brooke (author), van den Broeke, Michiel R. (author), Wouters, B. (author)
Surface mass balance (SMB) provides mass input to the surface of the Antarctic and Greenland Ice Sheets and therefore comprises an important control on ice sheet mass balance and resulting contribution to global sea level change. As ice sheet SMB varies highly across multiple scales of space (meters to hundreds of kilometers) and time (hourly...
journal article 2019
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Hendrikse, H. (author), Nord, Torodd Skjerve (author)
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...
journal article 2019
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Wouters, B. (author), Gardner, Alex S. (author), Moholdt, Geir (author)
Glaciers outside of the ice sheets are known to be important contributors to sea level rise. In this work, we provide an overview of changes in the mass of the world's glaciers, excluding those in Greenland and Antarctica, between 2002 and 2016, based on satellite gravimetry observations of the Gravity Recovery and Climate Experiment (GRACE)....
journal article 2019
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Jiang, H. (author), Nihtianov, S. (author), Makinwa, K.A.A. (author)
This paper describes an energy-efficient bridge readout IC (ROIC), which consists of a capacitively coupled instrumentation amplifier (CCIA) that drives a continuous-time delta–sigma modulator (CTM). By exploiting the CCIA’s ability<br/>to block dc common-mode voltages, the bridge’s bias voltage may exceed the ROIC’s supply voltage, allowing...
journal article 2019
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Besseling, Floris (author), Lengkeek, H.J. (author), de Waard, Huig (author), Nieuwenhuis, Kees (author)
The Afsluitdijk is one of the Dutch Delta programme landmarks. Afsluitdijk is a 32 km long primary flood defense, separating lake IJsselmeer from the Wadden Sea and protecting large areas of the Netherlands against flooding. Over the period spanning 2018 - 2022 the levee will be upgraded by the consortium Levvel (BAM, Van Oord and Rebel). Ice...
conference paper 2019
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Shamsutdinova, Guzel (author), Hendriks, M.A.N. (author), Jacobsen, Stefan (author)
Topography studies of concrete-ice abrasion were made to proceed in our understanding of the mechanisms of concrete wear by ice on Arctic offshore structures. The effects on various initial surfaces of a B75 normal-weight concrete (smooth, rough, sawn) and on the sawn surface of a LB60 lightweight concrete were studied during concrete-ice...
journal article 2019
Searched for: subject:"ice"
(1 - 20 of 100)

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