TY - GEN
T1 - Numerical simulation of wind turbine tower with earthquake forces and aerodynamic interactions
AU - Duverneuil, Pierre-Yves
AU - Rupakhety, Rajesh
AU - Olafsson, Simon
PY - 2018
Y1 - 2018
N2 - Wind energy is on the upswing in the past few years, and wind farms are being planned in seismically active areas. For example, a large-scale wind farm is being planned close to one of the most seismically active areas in South Iceland. As aerodynamic loads have already led to structural and financial losses, simultaneous consideration of seismic and wind loads is an important design consideration. In the near-fault region, typically within 25 km of an earthquake source, forward directivity effect causes large amplitude pulses of relatively long period. Such pulses can resonate with flexible structures such as wind towers, and cause significant damage or collapse. Past studies have shown that near-fault ground motions can have very severe effects on wind turbine towers. This study presents an analysis of seismic response of onshore wind turbine towers subjected to simultaneous action of wind and near-fault ground motion. The 5-MW baseline model defined by National Renewable Energy Laboratory (NREL) is selected as a case study. The computational platform FAST is used to simulate the response of the structure to a large number of recorded near-fault ground motions. Salient features of the structural response, quantified in terms of nacelle displacement and base moment demand are presented and discussed. Preliminary results indicate that seismic loads produce response comparable to extreme wind action, and simultaneous loading by wind and earthquake requires special attention in design
AB - Wind energy is on the upswing in the past few years, and wind farms are being planned in seismically active areas. For example, a large-scale wind farm is being planned close to one of the most seismically active areas in South Iceland. As aerodynamic loads have already led to structural and financial losses, simultaneous consideration of seismic and wind loads is an important design consideration. In the near-fault region, typically within 25 km of an earthquake source, forward directivity effect causes large amplitude pulses of relatively long period. Such pulses can resonate with flexible structures such as wind towers, and cause significant damage or collapse. Past studies have shown that near-fault ground motions can have very severe effects on wind turbine towers. This study presents an analysis of seismic response of onshore wind turbine towers subjected to simultaneous action of wind and near-fault ground motion. The 5-MW baseline model defined by National Renewable Energy Laboratory (NREL) is selected as a case study. The computational platform FAST is used to simulate the response of the structure to a large number of recorded near-fault ground motions. Salient features of the structural response, quantified in terms of nacelle displacement and base moment demand are presented and discussed. Preliminary results indicate that seismic loads produce response comparable to extreme wind action, and simultaneous loading by wind and earthquake requires special attention in design
UR - https://www.worldcat.org/title/recent-advances-in-earthquake-engineering-in-europe-16th-european-conference-on-earthquake-engineering-thessaloniki-2018/oclc/1032611869
UR - https://link.springer.com/book/10.1007/978-3-319-75741-4#toc
M3 - Conference paper
SN - 978-3-319-75740-7
SN - 978-3-030-09314-3
T3 - Geotechnical, Geological and Earthquake Engineering
BT - Recent Advances in Earthquake Engineering in Europe
A2 - Pitilakis, Kyriazis
PB - Springer
T2 - 16th European Conference on Earthquake Engineering 2018
Y2 - 18 June 2018 through 21 June 2018
ER -
