Blar i Vitenskapelige publikasjoner (TN-IMBM) på tittel

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    • Numerical simulations of the sliding impact between an ice floe and a ship hull structure in ABAQUS 

      Zhang, Jianan; Liu, Zhenhui; Ong, Muk Chen; Tang, Wenyong (Peer reviewed; Journal article, 2022)
      This paper studies the hull structural responses of a steel grillage subjected to sliding ice loads, which have been rarely investigated in the literature. Sliding ice loads are modelled using nonlinear finite element ...

    • Numerical stress analysis of tubular joints 

      Santacruz, Alejandro Polo; Mikkelsen, Ove (Peer reviewed; Journal article, 2021)
      The finite element analysis (FEA) presented in this paper pertains to the stress analysis of both the welded tubular T and X joints and is aimed to assess both the importance of the presence of the weld geometry and the ...

    • Numerical study of a concept for major repair and replacement of offshore wind turbine blades 

      Jiang, Zhiyu; Li, Lin; Guachamin-Acero, Wilson (Peer reviewed; Journal article, 2020-03)
      Repair and replacement of offshore wind turbine blades are necessary for current and future offshore wind turbines. To date, repair activities are often conducted using huge jack-up crane vessels and by applying a reverse ...

    • Numerical study on deployment of subsea template using coupled and uncoupled model 

      Hauge, Nils Olav; Li, Lin (Peer reviewed; Journal article, 2021)
      This study compares deployment of a subsea template simulated as a coupled model and as an uncoupled model in the time domain simulation software Orcaflex. Defining vessel motion as prescribed simplifies the model and will ...

    • Numerical study on vibratory extraction of offshore wind turbine monopile foundations under sandy seabed condition 

      Salahshour Langeroodi, Soheil; Ong, Muk Chen; Nematzadeh, Afrouz (Peer reviewed; Journal article, 2023)
      The wind industry has experienced a rapid growth in Europe over the last decades. The early generation turbines were designed for a life of 20–25 years. Decommissioning of offshore wind turbines is becoming more important ...

    • An object-oriented method for fully coupled analysis of floating offshore wind turbines through mapping of aerodynamic coefficients 

      El Beshbichi, Omar; Xing, Yihan; Ong, Muk Chen (Peer reviewed; Journal article, 2021-07)
      This work presents a novel object-oriented approach to model the fully-coupled dynamic response of floating offshore wind turbines (FOWTs). The key features offered by the method are the following: 1) its structure naturally ...

    • Observations of bridge stay cable vibrations in dry and wet conditions: A case study 

      Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjørnsson, Jonas Thor; Cheynet, Etienne; Wang, Jungao (Peer reviewed; Journal article, 2021)
      The characteristics of wind- and rain-wind-induced vibrations of bridge stay cables are studied by using ambient vibrations records acquired on a cable-stayed bridge. Mean wind speed and wind-cable angle, as well as the ...

    • Offloading operation bivariate extreme response statistics for FPSO vessel 

      Gaidai, Oleg; Cao, Yu; Xu, Xiaosen; Xing, Yihan (Peer reviewed; Journal article, 2023)
      The Floating Production Storage and Offloading unit (FPSO) is an offshore unit producing and storing crude oil prior to tanker transport. An important design concern is an accurate prediction of risky dynamic hawser tensions ...

    • Offshore tethered platform springing response statistics 

      Gaidai, Oleg; Xu, Jingxiang; Hu, Qingsong; Xing, Yihan; Zhang, Fuxi (Peer reviewed; Journal article, 2022)
      This paper demonstrates the validity of the Naess–Gadai method for extrapolating extreme value statistics of second-order Volterra series processes through application on a representative model of a deep water small size ...

    • Offshore Wind Turbine Loads and Motions in Unstable Atmospheric Conditions 

      Putri, Rieska Mawarni; Obhrai, Charlotte; Knight, Julie-Ann Marie (Peer reviewed; Journal article, 2019)
      Even though it is widely known that unstable atmospheric stability conditions can lead to higher turbulence, the use of proper turbulent wind models considering unstable conditions are not often used in the simulation of ...

    • Offshore wind turbine wake characteristics using scanning doppler lidar 

      Krishnamurthy, Raghavendra; Reuder, Joachim; Svardal, Benny; Fernando, Harindra Joseph S.; Jakobsen, Jasna Bogunovic (Journal article; Peer reviewed, 2017-10)
      Within an offshore wind park, wind flow characteristics are quite complex and govern both the energy production and the structural wind turbine response. An experimental study focussed on assessing the spatial variability ...

    • Oil tanker under ice loadings 

      Gaidai, Oleg; Yan, Ping; Xing, Yihan; Xu, Jingxiang; Zhang, Fuxi; Wu, Yu (Peer reviewed; Journal article, 2023)
      As a result of global warming, the area of the polar pack ice is diminishing, making merchant travel more practical. Even if Arctic ice thickness reduced in the summer, fractured ice is still presenting operational risks ...

    • On Competition-driven Teaching of Multidisciplinary Engineering Education: Implementation cases at University of Stavanger 

      Lemu, Hirpa G. (Peer reviewed; Journal article, 2017)
      This article will reflect the experience gained on problem-based learning (PBL) projects implemented in the last six years at University of Stavanger (UiS). The PBL projects were implemented by establishing two ”student-driven” ...

    • On the three-dimensional effects of the water entry of wedges 

      Wen, Xueliang; Ong, Muk Chen; Yin, Guang (Peer reviewed; Journal article, 2023-09)
      Three-dimensional (3D) effects on the total and spanwise slamming coefficients and the pressure reductions acting on the wedge surface during water entry are modeled in a unified manner. First, the water entry of wedges ...

    • On the wake flow behind a sphere in a pipe flow at low Reynolds numbers 

      Yin, Guang; Ong, Muk Chen (Peer reviewed; Journal article, 2020-10)
      Numerical simulations are carried out to investigate the flow around a stationary sphere in a pipe. Seven sphere diameters d = 0.1D–0.9D (D is the diameter of the pipe) are chosen to investigate the effects of the blockage ...

    • On-Bottom Stability of Umbilicals and Power Cables for Offshore Wind Applications 

      Ji, Guomin; Ong, Muk Chen (Peer reviewed; Journal article, 2019)
      With the increase in offshore wind farms, the demands for umbilicals and power cables have increased. The on-bottom stability of umbilicals and power cables under the combined wave and current loading is the most challenging ...

    • Operational reliability study of ice loads acting on oil tanker bow 

      Zhang, Jian; Gaidai, Oleg; Ji, Hegang; Xing, Yihan (Peer reviewed; Journal article, 2023-04)
      As a result of climate change, the Arctic glaciers start to melt, and the summer season arrives, making it acceptable for trade ships. There is still shattered ice in the saltwater even though the Arctic glaciers melt in ...

    • Optimal Rotary Wind Turbine Blade Modeling with Bond Graph Approach for Specific Local Sites 

      Mohammed, Abdulbasit; Sirahbizu, Belete; Lemu, Hirpa Gelgele (Peer reviewed; Journal article, 2022-09)
      The wind turbine blade is an important component for harnessing wind energy. It plays a vital role in wind turbine operation. In this work, a study was conducted to investigate the dynamic behavior of an optimal rotary ...

    • Overview study on challenges of additive manufacturing for a healthcare application 

      Wakjira, Yosef Adugna; Lemu, Hirpa G.; Akessa, Adugna Deressa (Peer reviewed; Journal article, 2021)
      Additive manufacturing is a rapidly evolving manufacturing technology bringing numerous and wide opportunities for the design team involved in the process by creating intricate and customized products with saving labor, ...

    • Parametric study of different unbonded tendon layouts in pre-stressed concrete flat plates 

      Samarakoon, Mudiyansele Samindi Manjula K; Hodne, Bjarte (Peer reviewed; Journal article, 2020-11)
      Post-tensioned unbonded tendons are widely used in fat slabs/plates when there is a demand for large span lengths, durable tendons and a reduction in the weight of structure. For post-tensioned fat slab/plates, diferent ...