Blar i NTNU Open på forfatter "Amdahl, Jørgen"
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Analysis of Ocean Farming's Steel Cage Concept Subjected to Environmental Loads
Eide, Arne Jakob (Master thesis, 2017)For marine structures with significant dynamics, the extreme responses are determined by time domain analyses of extreme sea states. These are based on the short-term extreme sea state selected from environmental contour ... -
Analysis of the Havfarm concept for extreme environmental loads
Gulpinar, Jørgen (Master thesis, 2021)Norsk havbruk har hatt en dramatisk vekst i det siste tiåret, både i form av økte produksjonsvolum, men også i størrelsen på oppdrettsanleggene. En av disse oppdrettsanleggene er Nordlaks sin Havfarm 1. Det er en stor ... -
Analytical & Numerical Analysis of Ship/FPSO Side Structures Subjected to Extreme Loading with Emphasis of Ice Actions
Bahar, Md Habibullah (Master thesis, 2014)AbstractIACS has implemented a unified requirement (UR) for polar going ships. This thesis work consists of a well understanding of the backgrounds of IACS UR, the way of applying those rules to the structure and the ... -
Analytical model to assess bending moments in wind turbine support structures subjected to ship collisions
Broersen, Adriaan (Master thesis, 2020)The number of offshore wind farms is growing rapidly, which increases the likelihood of ship collisions with offshore wind turbines. Additionally, the cost of energy reduction for wind turbines is achieved due to radical ... -
Assessment of Structural Damage due to Cryogenic Spill for FLNG Plants
Pettersen, Helene Orø (Master thesis, 2020) -
Assessment of structural damage due to cryogenic spill for FLNG plants: Beregning av konstruksjonsskade som følge av kryogenske utslipp på flytende LNG anlegg
Rasmussen, Simen Kleven (Master thesis, 2014)To investigate the effect of cooling by liquified natural gas, literature on the topic wasinvestigated in prior project work. Test results for cooling of steel by liquid nitrogen wascompared to numerical solutions of heat ... -
Buckling and Load Shedding in Redundant Plated Ship Structures
Palm, Astrid Maria (Master thesis, 2016)A linear Finite Element(FE) procedure developed by DNV GL as an alternative to standard design procedures for redundant plated panels has been tested and evaluated. The method is based on modifying the so-called macro ... -
Buckling and Post-Buckling Behaviour of Extruded Aluminium Panels Subject to the Combined Effects of Welding and Pitting Corrosion
Mokhtari, Mojtaba; Wang, Xintong; Amdahl, Jørgen (Chapter, 2023)The present study investigates the effects of pitting corrosion and welding, both independently and combined, on the buckling and post-buckling behaviour of extruded aluminium panels. For this purpose, a finite element ... -
Buckling of Non-spherical MOSS-LNG Tanks
Gjestvang, Peder (Master thesis, 2020)Etterspørselen etter store LNG-skip har økt. Den enkleste måten å øke kapasiteten til Moss LNG-skip er å øke diameteren til de sfæriske tankene, og dermed også skipets bredde. På grunn av begrensningene på skipets dimensjoner ... -
Buckling of Non-spherical Moss-LNG tank
Sanne, Andreas (Master thesis, 2019)Etterspørselen etter skip som kan frakte mer LNG har økt de siste årene ifølge Moss Maritime. Den uavhengige sfæriske tanken av type B fra Moss Maritime må modifiseres hvis et skip skal frakte mer LNG. Tanken kan ikke ... -
Buckling strength analysis of aluminium plates with varying panel thickness and heat-affected zone patterns
Jam, Jonas Vørrang (Master thesis, 2021)Aluminium er ett materiale med mange verdifulle egenskaper industrien kan dra nytte av. Dets høye spesifikke styrke gjør det til en ypperlig kandidat til å bygge lette skrog til hurtiggående båter med lavere klima utslipp ... -
Collision Between Platform Deck and Service Vessel Wheelhouse
Sætre, Jan Børge Mork (Master thesis, 2013)Collisions between ships and oshore structures are rarely occurring events, butpose a constant threat to the safety at sea. Observed trends in recent years hasshow that the size of both oshore structures and servicing ... -
Comparison of numerical response predictions for a bottom-fixed offshore wind turbine
Sørum, Stian Høegh; Horn, Jan-Tore H.; Amdahl, Jørgen (Journal article; Peer reviewed, 2017)Numerical simulations are widely used for response calculations on offshore wind turbines. Code-to-code comparisons are frequently used for verification of the codes, as full-scale measurements can be difficult to obtain. ... -
Conceptual Design of Surface Buoy for Arctic Conditions
Aasheim, Jon Marius (Master thesis, 2012)Due to a rising interest in oil exploration in Arctic areas several new platform designs have been introduced to combat the problems with level ice loads. This has led to research into ice strengthening and how this affects ... -
Damage Assessment of Sevan 1000 FPSO Subjected to Impacts from Shuttle Tankers
Hagen, Stian Arneborg (Master thesis, 2018)Floating, production, storage and offloading (FPSO) units are the only viable option for oil and gas production in deep waters. Shuttle tankers are normally employed for cargo transfer because they are the most practical ... -
Damage Assessment of Sevan FPSO Subjected to Impacts From Shuttle Tankers
Ma, Meilin (Master thesis, 2014)Platform-ship collisions are fortunately rare events, but as the development of the offshore and oil industry and the gradually frequently used offloading operation, accidents become more and more frequent. The consequences ... -
Design against ship collisions in accordance with the new DNV RP C204
Amdahl, Jørgen; Yu, Zhaolong (Chapter, 2021)A new version of the DNV RP C204 standard for the design of offshore steel structures against accidental loads was released in 2019. The updated recommended practice made considerable changes on the design against ship ... -
Design of offshore tubular members against excessive local indentation under lateral impacts
Yu, Zhaolong; Amdahl, Jørgen (Chapter, 2017)Tubular members are widely used in offshore jacket and jack-up platforms. Such structures are often exposed to the risk of lateral impacts from service vessels and dropped objects. The impact responses can generally be ... -
Design of steel bridge girders against ship forecastle collisions
Sha, Yanyan; Amdahl, Jørgen; Liu, Kun (Journal article; Peer reviewed, 2019)A key aspect in the design of mega bridge structures across navigable waterways is to ensure bridge safety with respect to accidental ship collisions. Special attention has been paid to providing sufficient impact resistance ... -
Determination of Environmental Conditions Relevant for the Ultimate Limit State at an Exposed Aquaculture Location
Bore, Pål Takle; Amdahl, Jørgen (Chapter; Peer reviewed, 2017)Methods for determination of environmental conditions relevant for the ultimate limit state at an exposed aquaculture location are proposed. The considered location is in Frohavet, northwest of Trondheim, Norway. Wind, ...