Blar i Fakultet for ingeniørvitenskap (IV) på tittel

Viser treff 13061-13080 av 23204

    • Long-term extreme response analysis of marine structures using inverse SORM 

      Giske, Finn-Idar Grøtta; Leira, Bernt Johan; Øiseth, Ole (Chapter; Peer reviewed, 2017)
      In this paper the first order reliability method (FORM) found in connection with structural reliability analysis is first used in an inverse manner to efficiently obtain an approximate solution of the full long-term extreme ...

    • Long-term extreme response and reliability of a vessel rolling in random beam seas 

      Chai, Wei; Næss, Arvid; Leira, Bernt Johan (Journal article; Peer reviewed, 2018)
      In this paper, the long-term extreme response of a vessel rolling in random beam seas and the associated reliability evaluation are addressed. The long-term response analysis is based on the upcrossing rates of the roll ...

    • Long-Term Fatigue Damage Sensitivity to Wave Directionality in Extra Large Monopile Foundations 

      Horn, Jan-Tore H.; Krokstad, Jørgen R; Amdahl, Jørgen (Journal article, 2017)
      The fatigue damage sensitivity to wave directionality on large-diameter monopile foundations for use in the offshore wind turbine industry is investigated. A frequency domain approach with the Dirlik method is used for a ...

    • Long-Term Hydrolytic Degradation of the Sizing-Rich Composite Interphase 

      Krauklis, Andrey; Gagani, Abedin; Echtermeyer, Andreas (Journal article; Peer reviewed, 2019)
      Glass fiber-reinforced composites are exposed to hydrolytic degradation in subsea and offshore applications. Fiber-matrix interphase degradation was observed after the matrix was fully saturated with water and typical water ...

    • Long-term impact on unlined tunnels of hydropower plants due to frequent start/stop sequences 

      Neupane, Bibek (Doctoral theses at NTNU;2021:400, Doctoral thesis, 2021)
      Abstract The concept of unlined pressure tunnel design is well-tested and has a history of more than 100 years. In Norway, more than 95% of hydropower pressure tunnels are unlined and most of it was built between 1950 ...

    • Long-term Influence of Concrete Surface and Crack Orientation on Self-healing and Ingress in Cracks – Field Observations 

      Danner, Tobias; Geiker, Mette Rica (Journal article; Peer reviewed, 2018)
      This paper presents results from investigations on the long-term influence of concrete surface and crack orientation on ingress in cracks. Five reinforced concrete structures from Norway exposed to either de-icing salts ...

    • Long-term ISO 23936-2 sweet oil ageing of HNBR 

      Akulichev, Anton; Alcock, Benjamin; Krauklis, Andrey; Tiwari, Avinash; Echtermeyer, Andreas (Journal article; Peer reviewed, 2021)
      A hydrogenated nitrile butadiene rubber (HNBR) compound is subjected to ageing in a simulated oil and gas environment in accordance with ISO 23936-2 standard at two elevated temperatures (130 °C and 150 °C) for a period ...

    • Long-term joint distribution of environmental conditions in a Norwegian fjord for design of floating bridges 

      Cheng, Zhengshun; Svangstu, Erik; Moan, Torgeir; Gao, Zhen (Journal article; Peer reviewed, 2019)
      A floating bridge is an attractive solution for crossing wide and deep fjords. To design a reliable and cost-effective floating bridge, it is very important to accurately evaluate the long-term environmental conditions at ...

    • Long-term meteorological data collection in Prato Piazza 

      Grødal, Sander (Bachelor thesis, 2023)
      Denne oppgaven tar for seg tverrfaglige teknikker til å belære seg om matematisk modellering, klimatologi og meterologi ved å benytte programmering. Hensikten med oppgaven er å føre værstatistikk av området Prato Piazza ...

    • Long-term monitoring of wind field characteristics and dynamic response of a long-span suspension bridge in complex terrain 

      Fenerci, Aksel; Øiseth, Ole; Rønnquist, Anders (Journal article; Peer reviewed, 2017)
      Long-term monitoring data of wind velocities and accelerations on the Hardanger Bridge are used to investigate the relationship between the wind-loading and response processes. The extensive measurement system consisting ...

    • Long-Term Properties of Interlaminar Shear Strength of Composite Laminates 

      Monsås, Anna Birgitte (Master thesis, 2018)
      Components made of fiber reinforced polymers (FRP) are frequently used in environments with fluctuating temperatures and moisture levels. These environmental factors lead to a degradation of the FRP in the long term. The ...

    • Long-term properties of the matrix of composites 

      Næss, Christoffer (Master thesis, 2016)
      Water diffusion into epoxy can be looked upon on as a 3-stage process. The first stage is the initial reaction, where the ends and available surfaces of the molecular chains bond with the water molecules. These easily ...

    • Long-term research challenges in wind energy - a research agenda by the European Academy of Wind Energy 

      van Kuik, G. A. M.; Peinke, J.; Nijssen, R.; Lekou, D.; Mann, Jakob; Sørensen, J. N.; Ferreira, C. Simoa; van Wingerden, W.; Schlipf, D.; Gebraad, P.; Polinder, H.; Abrahamsen, A.; van Bussel, G. J. W.; Sørensen, J. D.; Tavner, P.; Bottasso, C. L.; Muskulus, Michael; Matha, D.; Lindeboom, H. J.; Degraer, S.; Kramer, O.; Lehnhoff, S.; Sonnenschein, M.; Sørensen, P. E.; Künneke, R. W.; Morthorst, P. E.; Skytte, K. (Journal article; Peer reviewed, 2016)
      The European Academy of Wind Energy (eawe), representing universities and institutes with a significant wind energy programme in 14 countries, has discussed the long-term research challenges in wind energy. In contrast to ...

    • Long-term Response Analysis of Wind Turbines with an Emphasis on Fault and Shutdown Conditions 

      Jiang, Zhiyu (Doctoral thesis at NTNU;2014:266, Doctoral thesis, 2014)
      Wind turbines are exposed to a variety of load conditions during their 20-year service life. After installation, every turbine experiences operational, shutdown, and parked conditions, and any of these conditions might ...

    • Long-term response of a curved floating bridge to inhomogeneous wind fields 

      Morais da Costa, Bernardo; Wang, Jungao; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Øiseth, Ole Andre (Peer reviewed; Journal article, 2023)
      A numerical model of a 5 km long curved floating bridge, planned for the Bjørnafjord, in Norway, is subjected to strong wind events with stationary mean properties that vary along the bridge axis. A Weather Research and ...

    • Long-term stochastic extreme response analysis of floating bridges 

      Giske, Finn-Idar Grøtta; Leira, Bernt Johan; Øiseth, Ole (Journal article; Peer reviewed, 2017)
      For the assessment of extreme responses needed in design of marine structures, a full long-term analysis is recognized as the most accurate approach. However, due to the very large number of structural response analyses ...

    • A long-term study on structural changes in calcium aluminate silicate hydrates 

      Barzgar, Sonya; Yan, Yiru; Tarik, Mohamed; Skibsted, Jorgen; Ludwig, Christian; Lothenbach, Barbara (Peer reviewed; Journal article, 2022)
      Production of blended cements in which Portland cement is combined with supplementary cementitious materials (SCM) is an effective strategy for reducing the CO2 emissions during cement manufacturing and achieving sustainable ...

    • A long-term study on structural changes in calcium aluminate silicate hydrates 

      Barzgar, Sonya; Yan, Yiru; Tarik, Mohamed; Skibsted, Jorgen; Ludwig, Christian; Lothenbach, Barbara (Peer reviewed; Journal article, 2022)
      Production of blended cements in which Portland cement is combined with supplementary cementitious materials (SCM) is an effective strategy for reducing the CO2 emissions during cement manufacturing and achieving sustainable ...

    • Long-term sustainable management of the urban water and wastewater pipe networks 

      Bruaset, Stian (Doctoral theses at NTNU;2019:101, Doctoral thesis, 2019)
      Water utilities around the world are facing challenges related to the delivery of safe and secure water and environmental friendly collection and handling of wastewater. One of the main components in handling of these tasks ...

    • Long-term thermal performance of group of energy piles in unsaturated soils under cyclic thermal loading 

      Sani, Abubakar Kawuwa; Singh, Rao Martand (Peer reviewed; Journal article, 2021)
      Geothermal energy piles (GEPs) are an environmentally friendly heat exchange technology that dualizes the role of the structural foundation pile for load support and in meeting the building heating/cooling need. Energy ...