Browsing NTNU Open by Title
Now showing items 44940-44959 of 100872
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Ice abrasion of concrete, background theory and testing at the NTNU laboratory
(Master thesis, 2012)Ice abrasion has been reviewed. Concrete and ice and their most important properties in accordance to ice abrasion have been studied. Concrete strength and contact pressure between ice and concrete is found to be important ... -
Ice Abrasion on Fiber Reinforced Concrete: A Study on the Effects of Various Types of Fiber and the Reliability of the Laboratory Measurements
(Master thesis, 2014)The purpose of this study has been to compare how fiber reinforced concretes, using different amounts and types of fiber, behave compared to standard offshore concretes without fiber in regard to ice abrasion. The effect ... -
ICE ABRASION ON MARINE CONCRETE STRUCTURES
(Doctoral thesis at NTNU;2015:189, Doctoral thesis, 2015)A significant amount of the world’s undiscovered oil- and gas resources are located North of the Arctic Circle. In the light of this, there is currently an increasing interest in developing necessary infrastructure to ... -
Ice abrasion testing of high performance concrete for offshore structures
(Chapter, 2019)Offshore concrete structures exposed to drifting sea ice have abrasion of the concrete surface caused by the mechanical contact between ice and concrete in the order of 0.1 to 1 mm per year. The concrete-ice abrasion ... -
Ice abrasion testing of HP concrete for offshore structures
(Chapter, 2019)Offshore structures can be exposed to drifting sea ice. The wear (abrasion) of the concrete surface caused by the mechanical contact between ice and concrete is in the order of 0.1–1 mm per year. The concrete-ice abrasion ... -
Ice Accretion: Image Post-Processing Measurement Techniques for 2D Ice Shapes
(Peer reviewed; Journal article, 2023)Ice accretion poses substantial safety hazards for the manned and unmanned aviation industries. Its study is essential for icing events risk assessment and for the development of efficient ice protection systems. The ... -
Ice Actions on Offshore Structures – With Applications of Continuous Wavelet Transforms on Ice Load Signals
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:9, Doctoral thesis, 2006)Ice actions on offshore structures are one of the main concerns for engineering activities in cold areas with ice-infested waters. This thesis deals with three aspects of ice actions, namely design ice loads from level ... -
Ice and conical structure interactions
(Master thesis, 2010)The pursuit of energy in Arctic waters drives people to design ocean structures applying new concepts.Conical structures which shift the ice failure mode from crushing to bending could reduce the total iceload. Moreover, ... -
Ice and Ice Forces in Small Steep Rivers
(Doctoral theses at NTNU;2023:431, Doctoral thesis, 2023)English summary Given the right circumstances ice can wreak havoc on riverine infrastructure. Ice runs pushing ice floes against bridge piers is frequently the governing design condition for bridges in cold regions. The ... -
Ice breakup in small Norwegian streams
(Master thesis, 2013)River ice is present parts of the year in cold region environments and is an important component of the flow regime. The river ice is known to produce many extremes and potential floods far exceed those possible under ... -
The ICE Carbon (EUC) and Brent Oil Contracts: Volatility (Co-)Movements and Forecasts
(Chapter, 2021)This research looks at the conditional mean and volatility densities for the nearest maturities of renewable Carbon and fossil Brent Oil Futures contracts. The primary goal is to characterize the features of volatility ... -
Ice condition assessment using onboard accelerometers and statistical change detection
(Journal article; Peer reviewed, 2019)The presence of sea ice is the predominant risk for ship operations in the Arctic, and monitoring of ice condition around a vessel is crucial during all times of operation. This paper presents a system for online onboard ... -
Ice conditions in Norwegian rivers regulated for hydropower: An assessment in the current and future climate
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:367, Doctoral thesis, 2014)This PhD is focused on the river ice conditions in regulated rivers for the current and future climate. The studies are based on a series of modelling applications, field data collections and data analysis. First a process ... -
Ice Detection and Tracking Based on Satellite and Radar Images
(Master thesis, 2015)The tracking and management of ice is a topic of great importance, due to the dangers these ice targets pose to vessels and marine structures. As the marine activity increase in ice affected areas, the motivation for ... -
Ice drift and ice action on offshore wind farm structures
(Peer reviewed; Journal article, 2023)Development of offshore wind farms has so far been focused on areas without sea ice, but the increasing demand pushes the offshore wind industry into areas with seasonal sea ice, such as the Baltic Sea, the Great lakes and ... -
Ice formation and growth in supercooled water–alcohol mixtures: Theory and experiments with dual fiber sensors
(Peer reviewed; Journal article, 2020)Increased knowledge on fluid-solid phase transitions is needed, both when they are undesired and can impair processes operation, and when strict control is required in fields such as food technology, the pharmaceutical ... -
Ice growth and decay on road cuts along Bynesveien in Trondheim
(Master thesis, 2020)Dannelse-, smelte- og nedfallsprosessene til en iskjøving langs fylkesvei 715 i Trøndelag i Norge ble kartlagt gjennom vinteren 2019/2020, med det formål å undersøke påvirkningen av luft- og bergtemperatur på endringer i ... -
Ice induced resistance of ship hulls: A comparison of resistance estimated from measurements and analytical formulations
(Master thesis, 2011)Due to global warming and hydrocarbon exploration in the Arctic areas, there is an increasing maritime activity in ice infested waters. Today one can with good accuracy predict if a vessel will be able to survive an encounter ... -
Ice intelligence retrieval by remote sensing - Possibilities and challenges in an operational setting
(Journal article; Peer reviewed, 2017)Detecting ice drift velocity when operating offshore in ice-covered waters is crucial during marine operations, as ice actions affect station keeping and ice management. Furthermore, other ice data/intelligence such as ice ... -
Ice Load Impact on the Power Train of Azimuth Propulsion Systems
(Master thesis, 2014)This thesis seeks to investigate the advantages of using multibody simulation to develop proper models for power train analyses of azimuth propulsion systems. Azimuth thrusters are commonly installed on ice classed offshore ...