Blar i Fakultet for ingeniørvitenskap (IV) på tidsskrift "Cold Regions Science and Technology"
Viser treff 1-20 av 26
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A method for estimation of equivalent-volume ice thickness based on WMO egg code in absence of ridging parameters
(Journal article; Peer reviewed, 2018)When calculating equivalent-volume ice thickness along a vessel's projected route for the purpose of ice resistance estimation, information on both undeformed ice (level ice) and deformed ice (mainly ridges) is needed. ... -
A method for real-time estimation of full-scale global ice loads on floating structures
(Journal article; Peer reviewed, 2018)This paper proposes an algorithm that uses conventional measurements found on-board ships coupled with additional Inertial Measurement Units to estimate the motions and global loads acting on them. The work is motivated ... -
A phenomenological explanation of the pressure-area relationship for the indentation of ice: Two size effects in spherical indentation experiments
(Journal article, 2015)Indentation tests provide a simple means to study the inelastic behavior of ice and other materials when loaded under a compressive stress state. Such tests provide force–time plots which are often converted to pressure–area ... -
Airplane braking friction on dry snow, wet snow or slush contaminated runways
(Journal article; Peer reviewed, 2018)Airplanes need tire-pavement friction during taxiing, take-off and landing. The presence of snow reduces the friction and therefore there is need to understand how much friction can be expected on the different types of ... -
An implicit time-stepping scheme and an improved contact model for ice-structure interaction simulations
(Journal article; Peer reviewed, 2018)This paper presents a novel time-stepping scheme for the modelling of discrete ice-structure interaction. The scheme extends the non-smooth discrete element modelling (NDEM) technique to enable compliant continuous and ... -
An overview of the Oden Arctic Technology Research Cruise 2015 (OATRC2015) and numerical simulations performed with SAMS driven by data collected during the cruise
(Journal article; Peer reviewed, 2018)In the autumn of 2015, the Norwegian University of Science and Technology (NTNU) and the Swedish Polar Research Secretariat (SPRS) performed a research cruise named the “Oden Arctic Technology Research Cruise 2015” ... -
Assessing soil index parameters to determine the frost susceptibility of crushed rock aggregates
(Peer reviewed; Journal article, 2022)In Norway, crushed rock aggregates are widely used in all layers of pavement infrastructures. Frost heave severely affected the Norwegian road network during cold winters of 2009/10 and 2010/11, including newly built roads. ... -
Bicycle rolling resistance under winter conditions
(Peer reviewed; Journal article, 2021)In many cold regions of the world, the percentage of trips made by bicycle drops drastically during the winter months. To facilitate increased bicycle usage during the winter, we studied the effect of typical winter ... -
Can calorimetry be used to measure the melting rate of deicers
(Peer reviewed; Journal article, 2020)Chemical deicers are used in winter maintenance of roads and runways to melt ice and restore a bare pavement. The melting rate of these deicers is a fundamental performance factor, but good test methods to quantify the ... -
Consolidation of fresh ice ridges for different scales
(Peer reviewed; Journal article, 2020)This study characterizes the refreezing process of deformed ice. Twenty laboratory experiments in ice ridge consolidation were conducted to study the influence of ridge blocks size, initial temperature, and top surface ... -
Decay phase thermodynamics of ice ridges in the Arctic Ocean
(Journal article; Peer reviewed, 2018)Four ice ridges (R1, R2, R3, and R4) were studied during the spring of 2015 in the Arctic Ocean. During the Norwegian Young Sea Ice expedition (N-ICE2015) from January 11 to June 23, the R/V Lance was moored at four different ... -
Dynamic bending of an ice wedge resting on a winkler-type elastic foundation
(Journal article; Peer reviewed, 2022)For most ice – sloping structure interactions, the incoming ice floes' failures are determined by the formation of circumferential cracks. This physical process can be simplified as analyzing the bending failure of an ice ... -
Fast onboard detection of ice drift changes under stationkeeping in ice
(Peer reviewed; Journal article, 2022)Early detection of ice drift changes is essential for safe stationkeeping in ice-infested waters. This paper presents a conceptual system allowing onboard detection of ice drift changes in managed and unmanaged ice using ... -
Image Processing for Ice Floe Analyses in Broken-ice Model Testing
(Journal article; Peer reviewed, 2015)The ice floe shape and size distribution are important ice parameters in ice-structure analyses. Before performing an analysis at full scale, the dynamic positioning (DP) experiments in model ice at the Hamburg Ship Model ... -
Laboratory study of wave-induced flexural motion of ice floes
(Peer reviewed; Journal article, 2021)Wave-ice interactions involve complex physical processes. Well-designed laboratory investigations are indispensable for studying these processes. In the present study, laboratory experimental data on saline ice obtained ... -
Laboratory tests to investigate the initial phase of ice ridge consolidation
(Peer reviewed; Journal article, 2020)During lake/sea ice ridging and river ice jamming, broken ice blocks experience transient heat conduction. In present work, this process is represented by submerging a cold fresh-ice block into fresh water at freezing ... -
Medium-scale experiment in consolidation of an artificial sea ice ridge in Van Mijenfjorden, Svalbard
(Peer reviewed; Journal article, 2021)This study characterizes a consolidation of undeformed level ice and ice ridges. Field investigations were performed in the Van Mijenfjorden, Svalbard for 66 days between February and May of 2017. The thickness and properties ... -
Modelling winter operational strategies of a hydropower system
(Journal article; Peer reviewed, 2016)The ice conditions in regulated rivers can be very complicated due to both intake and release of water to and from hydropower plants. The optimal operational strategies for the hydropower system must involve ice management ... -
Numerical assessment of a double-acting offshore vessel's performance in level ice with experimental comparison
(Journal article; Peer reviewed, 2014)In this paper a numerical model is used to investigate the level ice performance of a double-acting intervention vessel, and the results are compared with a limited set of experimental data. The icebreaking capability and ... -
Numerical study of ice-induced loads and responses of a monopile-type offshore wind turbine in parked and operating conditions
(Journal article; Peer reviewed, 2016)Offshore wind is an attractive source of renewable energy. In regions with cold climates, such as Canada, the Baltic Sea, and Bohai Bay, a good understanding of ice loads is essential to design a reliable and cost effective ...