Now showing items 1-20 of 153

    • A Decision Model for Executing Plant Strategy: Maintaining the Technical Integrity of Petroleum Flowlines 

      Ratnayake, R..M. Chandima (Journal article; Peer reviewed, 2012-05)
      The ‘strategic’ management of technical integrity has become a high profile subject matter over recent years within inspection and maintenance of assets in the process industry. The assets such as production and ...
    • An accurate fatigue damage model for welded joints subjected to variable amplitude loading 

      Aeran, Ashish; Siriwardane, S.A. Sudath C.; Mikkelsen, Ove; Langen, Ivar (Journal article; Peer reviewed, 2017)
      Researchers in the past have proposed several fatigue damage models to overcome the shortcomings of the commonly used Miner's rule. However, requirements of material parameters or S-N curve modifications restricts their ...
    • An efficient approach for ship collision design of reinforced concrete pontoon walls 

      Sha, Yanyan; Amdahl, Jørgen; Yang, Kun (Journal article; Peer reviewed, 2019)
      This paper presents an efficient method for collision design of prestressed concrete pontoon walls. High fidelity finite element models of a container ship bow and a prestressed concrete pontoon wall are first established. ...
    • Applicability of Existing Crack Controlling Criteria for structures with Large Concrete Cover Thickness 

      Guruge, Chavin Nilanga Naotunna Palliy; Samarakoon, Mudiyansele Samindi Manjula K; Fosså, Kjell Tore (Peer reviewed; Journal article, 2021-07)
      Widely used crack width calculation models and allowable crack width limits have changed from time to time and differ from region to region. It can be identified that some crack width calculation models consist with ...
    • An Approach to Determine Optimal Bow Configuration of Polar Ships under Combined Ice and Calm-Water Conditions 

      Li, Hu; Feng, Yan; Ong, Muk Chen; Zhao, Xin; Zhou, Li (Peer reviewed; Journal article, 2021-06)
      Selecting an optimal bow configuration is critical to the preliminary design of polar ships. This paper proposes an approach to determine the optimal bow of polar ships based on present numerical simulation and available ...
    • Assessing the Technical Specifications of Predictive Maintenance: A Case Study of Centrifugal Compressor 

      Nordal, Helge; El-Thalji, Idriss (Peer reviewed; Journal article, 2021-02)
      Dependability analyses in the design phase are common in IEC 60300 standards to assess the reliability, risk, maintainability, and maintenance supportability of specific physical assets. Reliability and risk assessment ...
    • Assessment of operational limits : Effects of uncertainties in sea state description 

      Li, Lin; Haver, Sverre Kristian; Berlin, Nikita (Peer reviewed; Journal article, 2021-02)
      For operations dominated by waves, operational limits are normally expressed in terms of allowable sea state parameters, such as the significant wave height (Hs) and spectral peak period (Tp). The allowable sea states need ...
    • Assessment of wind conditions at a fjord inlet by complementary use of sonic anemometers and lidars 

      Jakobsen, Jasna Bogunovic; Cheynet, Etienne; Snæbjörnsson, Jonas Thor; Mikkelsen, Torben; Sjøholm, Mikael; Angelou, Nicolas; Hansen, Per; Mann, Jakob; Svardal, Benny; Kumer, Valerie-Marie; Reuder, Joachim (Journal article; Peer reviewed, 2015)
      Wind velocity measurement devices based on the remote optical sensing, lidars, are extensively applied in wind energy research and wind farm operation. The present paper demonstrates the relevance and potential of lidar ...
    • Baseline design of a subsea shuttle tanker system for liquid carbon dioxide transportation 

      Ma, Yucong; Xing, Yihan; Ong, Muk Chen; Hemmingsen, Tor (Peer reviewed; Journal article, 2021-10)
      This paper presents the baseline design of a 34,000-tonne subsea shuttle tanker (SST). The SST is proposed as an alternative to subsea pipelines and surface tankers for the transportation of liquid carbon dioxide (CO2) ...
    • Bridge buffeting by skew winds: A revised theory 

      Morais da Costa, Bernardo; Wang, Jungao; Jakobsen, Jasna Bogunovic; Øiseth, Ole Andre; Snæbjørnsson, Jonas Thor (Peer reviewed; Journal article, 2021-01)
      An improved bridge buffeting theory is established with an emphasis on skew wind directions, for both turbulence- and motion-dependent forces. It provides simplifications and generalizations of previously established ...
    • Cascade analysis of a floating wind turbine rotor 

      Eliassen, Lene; Jakobsen, Jasna B.; Knauer, Andreas; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2014)
      Mounting a wind turbine on a floating foundation introduces more complexity to the aerodynamic loading. The floater motion contains a wide range of frequencies. To study some of the basic dynamic load effect on the ...
    • A Case Study on Topology Optimized Design for Additive Manufacturing 

      Gebisa, Aboma Wagari; Lemu, Hirpa G. (Journal article; Peer reviewed, 2017-12)
      Topology optimization is an optimization method that employs mathematical tools to optimize material distribution in a part to be designed. Earlier developments of topology optimization considered conventional manufacturing ...
    • Case study on topology optimized design for additive manufacturing 

      Lemu, Hirpa G.; Aliyi, A.M. (Peer reviewed; Journal article, 2019-10)
      Additive Manufacturing (AM), also known as rapid prototyping, rapid manufacturing, layer manufacturing and three-dimensional printing, represents one of the most promising aspects of manufacturing for highly complex ...
    • A case study on use of 3D scanning for reverse engineering and quality control 

      Lemu, Hirpa Gelgele; Helle, Robin H. (Peer reviewed; Journal article, 2021-03)
      Reverse engineering is needed to acquire knowledge of design that is lost, obsolete or withheld. Techniques have evolved from manual measurements, to utilizing the possibilities that lie within 3D scanning technologies. ...
    • CFD Investigation on Hydrodynamic Resistance of a Novel Subsea Shuttle Tanker 

      Xing, Yihan; Janocha, Marek Jan; Yin, Guang; Ong, Muk Chen (Peer reviewed; Journal article, 2021-12)
      The Subsea Shuttle Tanker (SST) was proposed by Equinor as an alternative to subsea pipelines and surface tankers for the transportation of liquid carbon dioxide (CO2) from existing offshore/land facilities to marginal ...
    • CFD investigations of scour beneath a submarine pipeline with the effect of upward seepage 

      Li, Yuzhu; Ong, Muk Chen; Fuhrman, David R. (Peer reviewed; Journal article, 2020-12)
      A numerical model of scour beneath subsea structures considering the effect of upward seepage in the seabed is proposed. A small seepage can cause significant changes to the hydrodynamic force on the bed surface and stability ...
    • CFD simulations of a suspension bridge deck for different deck shapes with railings and vortex mitigating devices 

      Kusano, Ibuki; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor (Peer reviewed; Journal article, 2019)
      Aerodynamic response of a single-box suspension bridge girder is investigated using CFD simulations. The importance of including railings and vortex mitigating devices such as guide vanes and a spoiler in the simulations ...
    • Challenges and opportunities in tags and tag-related technical information management 

      Abu-shagfa, Menyar Deyab (Masteroppgave/UIS-TN-IKM/2014;, Master thesis, 2014-06-16)
      The fact that many giant Norwegian oil and gas fields are in decline, and that these fields have reached their tail phase urges Oil and Gas (O&G) companies to focus on maintenance and modification projects to extend the ...
    • Challenges and opportunities of marine propulsion with alternative fuels 

      Chiong, Meng-Choung; Kang, Hooi-Siang; Shaharuddin, Nik Mohd Ridzuan; Mat, Shabudin; Quen, Lee Kee; Ten, Ki-Hong; Ong, Muk Chen (Peer reviewed; Journal article, 2021-06)
      The increasingly stringent shipping emissions regulations and global decarbonisation movement have prompted the adoption of alternative fuels in the shipping industry. This review presents the performance results and ...
    • Choice of fuel system for the offshore support fleet 

      Eliassen, Martin Lie; Gudmestad, Ove Tobias (Journal article; Peer reviewed, 2019)
      The stringent requirements of the IMO's emission regulations call for alternative fuels and new ways of powering ships. However, the IMO predicts that technology which could reduce ship emission to zero, will either not ...