Dynamics of Simply Supported Beam Members Subject to Vertical Seismic Acceleratio
Session
Civil Engineering, Infrastructure and Environment
Description
Conductors and guard wires of overhead transmission lines are very sensitive to vortex-induced vibrations. Such phenomenon, also known as “aeolian vibrations” in the community of transmission line engineers, has been since long recognized as a major cause of wear damage and fatigue failures of both conductors and other line components. Passive dissipation devices, such as Stockbridge dampers, are typically installed to mitigate aeolian vibrations.
Stockbridge dampers are characterized by a markedly nonlinear dynamic behavior and a significant variability of their mechanical properties, which makes their modeling a challenging task. A simple reduced-order dynamic model has been recently developed within the authors’ research group, starting from an application of the Bouc-Wen phenomenological hysteretic model. The damper model has been then used along with an application of the Energy Balance Method to assess the severity of aeolian vibrations within a deterministic framework.
The present paper discusses the effect of the uncertainties related to the damper model parameters on the predicted values of aeolian vibrations and their impact on the efficiency of the damping device.
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-550-95-6
Location
UBT Lipjan, Kosovo
Start Date
28-10-2023 8:00 AM
End Date
29-10-2023 6:00 PM
DOI
10.33107/ubt-ic.2023.359
Recommended Citation
Foti, Francesco, "Dynamics of Simply Supported Beam Members Subject to Vertical Seismic Acceleratio" (2023). UBT International Conference. 23.
https://knowledgecenter.ubt-uni.net/conference/IC/civil/23
Dynamics of Simply Supported Beam Members Subject to Vertical Seismic Acceleratio
UBT Lipjan, Kosovo
Conductors and guard wires of overhead transmission lines are very sensitive to vortex-induced vibrations. Such phenomenon, also known as “aeolian vibrations” in the community of transmission line engineers, has been since long recognized as a major cause of wear damage and fatigue failures of both conductors and other line components. Passive dissipation devices, such as Stockbridge dampers, are typically installed to mitigate aeolian vibrations.
Stockbridge dampers are characterized by a markedly nonlinear dynamic behavior and a significant variability of their mechanical properties, which makes their modeling a challenging task. A simple reduced-order dynamic model has been recently developed within the authors’ research group, starting from an application of the Bouc-Wen phenomenological hysteretic model. The damper model has been then used along with an application of the Energy Balance Method to assess the severity of aeolian vibrations within a deterministic framework.
The present paper discusses the effect of the uncertainties related to the damper model parameters on the predicted values of aeolian vibrations and their impact on the efficiency of the damping device.