Blar i Fakultet for ingeniørvitenskap (IV) på tittel
Viser treff 22901-22920 av 23135
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Wave slamming forces on truss structures for wind turbines
(Master thesis, 2013)Generally the foundations of offshore wind turbines are steel truss structures which are exposed to wave slamming forces due to breaking waves, typically plunging breaking waves in shallow water. Calculations show that the ... -
Wave slamming forces on truss support structures for wind turbines
(Master thesis, 2012)This thesis is a study of the slamming forces from plunging breaking waves on truss support structures in shallow water. The main parts have been model testing and analysis on an existing 1:50 scale model of a truss support ... -
Wave- and wind-induced responses of the semisubmersible wind energy and flap-type wave energy converter based on experiments
(Journal article; Peer reviewed, 2017)This paper deals with a study of wave and wind induced responses of the combined energy concept SFC in operational and survival conditions based on experimental data. The measured responses that are studied include motions ... -
Wave-in-Deck Forces and Response of Semi-Submersibles
(Master thesis, 2017)In critical sea states, semi-submersibles may experience large negative air gaps in which incoming waves cause large slamming loads that may lead to severe structural deformations. Wave loads due to slamming are difficult ... -
Wave-Induced Accelerations of a Fish-Farm Elastic Floater: Experimental and Numerical Studies
(Chapter; Peer reviewed, 2014)Numerical simulations and experiments of an elastic circular collar of a floating fish farm are reported. The floater model without netting structure is moored with nearly horizontal moorings and tested in regular deep-water ... -
Wave-induced bottom shear stress estimation in shallow water exemplified by using deep water wind statistics
(Journal article; Peer reviewed, 2017)The paper provides a simple and analytical method which can be used to give estimates of the wave-induced bottom shear stress for very rough beds and mud beds in shallow water based on wind statistics in deep water. This ... -
Wave-induced current for long-crested and short-crested random waves
(Journal article; Peer reviewed, 2014)This paper provides a simple analytical tool which can be used to calculate the wave-induced current beneath long-crested (2D) and short-crested (3D) random waves. The approach is based on assuming the waves to be a ... -
Wave-induced nonlinear effects on a pontoon-type Very Large Floating Structures (VLFS)
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:61, Doctoral thesis, 2011)The wave-induced nonlinear effects on the pontoon-type Very Large Floating Structure (VLFS) is investigated in this thesis. Typical dimensions of the pontoon-type VLFS such as a floating airport are 5000m in length, 2000m ... -
Wavefield reconstruction for velocity–stress elastodynamic full-waveform inversion
(Peer reviewed; Journal article, 2020)Gradient computations in full-waveform inversion (FWI) require calculating zero-lag cross-correlations of two wavefields propagating in opposite temporal directions. Lossless media permit accurate and efficient reconstruction ... -
Waves and associated currents-experiences from 5 years metocean measurements in the northern North Sea
(Journal article; Peer reviewed, 2019) -
Waves' numerical dispersion and damping due to discrete dispersion relation
(Chapter; Peer reviewed, 2014)In linear Rankine panel method, the discrete linear dispersion relation is solved on a discrete free-surface to capture the free-surface waves generated due to wave-body interactions. Discretization introduces numerical ... -
Wax Deposition as a Function of Flow Regimes
(Master thesis, 2018)As petroleum fluids flow in subsea pipelines, the fluids are cooled by the surrounding water. Many crude oils contain substantial amounts of wax molecules, and if the temperature of the fluids drops below the Wax Appearance ... -
Wayfaring in the Biomedical Sector: A Call for Re-Introducing the Toolmaker
(Doctoral theses at NTNU;2018:403, Doctoral thesis, 2018)This thesis aims to provide an understanding of the Why? and How? of a modern toolmaker, specifically within the biomedical sector, on a theoret- ical and practical level and what their role is within a product development ... -
Wayfinding in Virtual Environments
(Master thesis, 2020)Navigasjonsoppgaver er en viktig del av folks hverdag. Når man skal til skole og jobb, eller reiser til nye steder er navigasjon nødvendig. Til tross for at folk er vant til dette konseptet i den virkelige verden, er ... -
A weak-scatterer potential flow theory-based model for the hydroelastic analysis of offshore wind turbine substructures
(Peer reviewed; Journal article, 2021)This paper examines the hydroelastic response of a monopile structure, supporting an offshore wind turbine. A new numerical simulation tool is presented, coupling a nonlinear potential flow solver to a structural model ... -
Weakly nonlinear broadband and multi-directional surface waves on an arbitrary depth: A framework, Stokes drift, and particle trajectories
(Peer reviewed; Journal article, 2021)Surface gravity waves in coastal waters are broadband and multi-directional, whose quadratic properties are of considerable engineering and scientific interest. Based on a Stokes expansion and an envelope-type framework, ... -
Weakly nonlinear surface waves on vertically sheared currents
(Doctoral theses at NTNU;2024:57, Doctoral thesis, 2024)Extreme waves, also known as rogue waves, have much larger heights than surrounding waves, which are of great danger to ships and coastal structures. A subsurface shear current is able to change the properties of the surface ... -
Weakly nonlinear transient waves on a shear current: ring waves and skewed Langmuir rolls
(Journal article; Peer reviewed, 2019)We investigate the weakly nonlinear dynamics of transient gravity waves at infinite depth under the influence of a shear current varying linearly with depth. The shear field makes this problem three-dimensional and rotational ... -
Wear and corrosion properties of steels used in Tunnel Boring Machines
(Master thesis, 2012)In this master thesis experiments were conducted to determine the abrasion-corrosion properties of a steel designed for TBM tunnelling. This was done by three different tests, reciprocal ball-on-plate, rubber wheel and ... -
Wear bushing for drill through subsea tree
(Master thesis, 2010)Aker Solutions AS develops and manufactures Christmas trees. A version of the Christmas tree, called Horizontal Christmas tree, makes drill through operation possible. As part of Aker Solutions AS ongoing project ...