Blar i UiS Brage på forfatter "Snæbjörnsson, Jonas Thor"

Viser treff 1-14 av 14

    • Aerodynamic study of a suspension bridge deck by CFD simulations, wind tunnel tests and full-scale observations 

      Kusano, Ibuki; Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor (Peer reviewed; Journal article, 2021)
      Assessing the aerodynamic characteristics of long-span bridges is fundamental for their design. Depending on the terrain complexity and local wind conditions, episodes of large angles of attack (AoA) of 15° may be observed. ...

    • Application of short-range dual-Doppler lidars to evaluate the coherence of turbulence 

      Cheynet, Etienne Francois Cyprien; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Mikkelsen, Torben; Sjöholm, Mikael; Mann, Jakob; Hansen, Per; Angelou, Nikolas; Svardal, Benny (Peer reviewed; Journal article, 2016)
      Two synchronized continuous wave scanning lidars are used to study the coherence of the along-wind and across-wind velocity components. The goal is to evaluate the potential of the lidar technology for application in wind ...

    • 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 ...

    • 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 ...

    • Damping estimation of large wind-sensitive structures 

      Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor (Peer reviewed; Journal article, 2017)
      The adequacy of two identification techniques to accurately estimate the modal damping ratios (MDRs) from ambient vibration records is assessed for long-span suspension bridges with eigen frequencies close to or below 0.1 ...

    • Dual lidar wind measurements along an upstream horizontal line perpendicular to a suspension bridge 

      Nafisifard, Mohammad; Jakobsen, Jasna Bogunovic; Cheynet, Etienne; Snæbjörnsson, Jonas Thor; Sjöholm, Mikael; Mikkelsen, Torben (Peer reviewed; Journal article, 2021)
      Remote wind sensing can complement traditional anemometry at a bridge site and contribute to an improved wind-resistant design of long-span bridges. This study examines wind lidar measurement data recorded along a ...

    • Full-scale observation of the flow downstream of a suspension bridge deck 

      Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Angelou, Nikolas; Mikkelsen, Torben; Sjöholm, Mikael; Svardal, Benny (Peer reviewed; Journal article, 2017-12)
      The paper presents a full-scale observation of the flow conditions downstream of a suspension bridge by a system of synchronized short-range dual-Doppler wind lidars. The lidar units were deployed directly on the bridge ...

    • An image processing approach to reconstruct wind using long-range wind lidars 

      Nafisifard, Mohammad; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Agustsson, Halfdan; Grønsleth, M.S.; Undheim, O. (Peer reviewed; Journal article, 2023)
      Lidar-based wind sensing technology, originally used in the wind energy sector, is now being utilized in wind engineering to monitor wind action for designing fjord-crossing infrastructure like long-span bridges. Accurate ...

    • Improved long-span bridge modeling using data-driven identification of vehicle-induced vibrations 

      Cheynet, Etienne; Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor (Peer reviewed; Journal article, 2020)
      The paper introduces a procedure to automatically identify key vehicle charac-teristics from vibrations data collected on a suspension bridge. The primarygoal is to apply a model of the dynamic displacement response of a ...

    • Improved long‐span bridge modeling using data‐driven identification of vehicle‐induced vibrations 

      Cheynet, Etienne; Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor (Peer reviewed; Journal article, 2020-06)
      The paper introduces a procedure to automatically identify key vehicle characteristics from vibrations data collected on a suspension bridge. The primary goal is to apply a model of the dynamic displacement response of a ...

    • The influence of terrain on the mean wind flow characteristics in a fjord 

      Cheynet, Etienne; Liu, Shengnan; Ong, Muk Chen; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; gatin, Inno (Peer reviewed; Journal article, 2020)
      Flow conditions in complex terrains such as fjords are highly three-dimensional and thus not properly captured by the wind flow models developed for homogenous terrains. In the present study, we explore the potential of ...

    • 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, 2023-07)
      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 ...

    • Measurements of Surface-Layer Turbulence in a Wide Norwegian Fjord Using Synchronized Long-Range Doppler Wind Lidars 

      Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Mann, Jakob; Courtney, Michael; Lea, Guillaume; Svardal, Benny (Peer reviewed; Journal article, 2017)
      Three synchronized pulsed Doppler wind lidars were deployed from May 2016 to June 2016 on the shores of a wide Norwegian fjord called Bjørnafjord to study the wind characteristics at the proposed location of a planned ...

    • Triple-lidar measurements of wind across a virtual rotor plane over a sea surface 

      Nafisifard, Mohammad; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Sjøholm, Mikael; Mann, Jakob (Peer reviewed; Journal article, 2023)
      An improved understanding of the spatiotemporal characteristics of the wind velocity field above the sea surface will benefit the design of modern offshore wind turbines. This study examines wind velocity data recorded on ...