Blar i UiS Brage på forfatter "Cheynet, Etienne"

Viser treff 1-20 av 20

    • 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. ...

    • 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 ...

    • Bridge deck aerodynamics: A case study in full-scale 

      Daniotti, Nicolò (PhD thesis UiS;, Doctoral thesis, 2022-04)
      One of the key aspects of bridge deck aerodynamics is the transformation of the incident wind flow into fluctuating surface pressures around a bridge deck. The atmospheric turbulence generates fluctuating loads on bridge ...

    • The COTUR project: remote sensing of offshore turbulence for wind energy application 

      Cheynet, Etienne; Flügge, Martin; Reuder, Joachim; Jakobsen, Jasna Bogunovic; Heggelund, Yngve; Svardal, Benny; Saavedra Garfias, Pablo Andres; Obhrai, Charlotte; Daniotti, Nicolo; Berge, Jarle; Duscha, Christiane Anabell; Wildmann, Norman; Onarheim, Ingrid Husøy; Godvik, Marte (Peer reviewed; Journal article, 2021-09)
      The paper presents the measurement strategy and data set collected during the COTUR (COherence of TURbulence with lidars) campaign. This field experiment took place from February 2019 to April 2020 on the southwestern coast ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Metocean conditions at two Norwegian sites for development of offshore wind farms 

      Cheynet, Etienne; Li, Lin; Jiang, Zhiyu (Peer reviewed; Journal article, 2024)
      This paper examines metocean data from NORA3, a state-of-the-art wind and wave hindcast dataset for Northern Europe. Two offshore Norwegian areas, Utsira Nord (UN) and Sørlige Nordsjø II (SN2), are investigated. Both areas ...

    • 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 ...

    • Recommendation on use of wind lidars 

      Reuder, Joachim; Cheynet, Etienne; Clifton, Andrew; van Dooren, Marijn Floris; Gottschall, Julia; Jakobsen, Jasna Bogunovic; Mann, Jakob; Palma, Jose; Schlipf, David; Sjøholm, Mikael; Trujillo, Juan-Jose; Thobois, Ludovic; Würth, Ines; Zasso, Alberto (Research report, 2021)
      The 15 Early Stage Researchers (ESRs) in the LIKE project investigate topics in which wind lidar play a significant role. This report provides the ESRs an introductory reading and gives a short introduction into the basic ...

    • Spectral characteristics of surface-layer turbulence in the North Sea 

      Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Obhrai, Charlotte (Journal article, 2017-10)
      According to IEC 61400-1 and IEC 61400-3 standards, the wind load on the rotor-nacelle assembly of offshore wind turbines should be estimated from the Kaimal or Mann spectral models, unless site-specific full-scale ...

    • Thermal Stratification and Turbulent Wind Loading on Floating Wind Turbines 

      Putri, Rieska Mawarni (PhD thesis UiS;, Doctoral thesis, 2023)
      Offshore wind is a promising clean energy alternative to fossil fuels. The wind resource at sea is considerably stronger than on land, and the offshore wind turbines (OWTs) tend to be larger. Currently, more than 160 ...

    • Turbulence in a coastal environment: the case of Vindeby 

      Putri, Rieska Mawarni; Cheynet, Etienne; Obhrai, Charlotte; Jakobsen, Jasna Bogunovic (Journal article; Peer reviewed, 2022-08-11)
      The one-point and two-point power spectral densities of the wind velocity fluctuations are studied using the observations from an offshore mast at Vindeby Offshore Wind Farm, for a wide range of thermal stratifications of ...

    • Unfrozen Skewed Turbulence for Wind Loading on Structures 

      Cheynet, Etienne; Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjørnsson, Jonas Thor; Wang, Jungao (Peer reviewed; Journal article, 2022)
      The paper introduces an algorithm to generate a three-variate four-dimensional wind turbulence field suited for yawed wind dynamic load simulation. At large yaw angles, a relaxation of Taylor’s hypothesis of frozen turbulence ...

    • Wind coherence measurement by a single pulsed Doppler wind lidar 

      Kumer, Valerie-Marie; Cheynet, Etienne; Jakobsen, Jasna Bogunovic; Svardal, Benny; Reuder, Joachim (Journal article; Peer reviewed, 2016)
      A single pulsed Doppler wind lidar, deployed at the FINO1 platform in the North Sea, has been used to monitor the lateral and vertical coherence of the along-wind component. To maximize the sampling frequency of the ...

    • Wind-induced vibrations of a suspension bridge: A case study in full-scale 

      Cheynet, Etienne (PhD thesis UiS;326, Doctoral thesis, 2016-12-16)
      In 2013, the Norwegian government adopted an ambitious plan to cross the wide and deep-fjords of Western Norway and create a ferry-free coastal high- way route. This implies the construction of multiple long-span bridges ...