Details
| Original language | English |
|---|---|
| Pages (from-to) | 1422-1443 |
| Number of pages | 22 |
| Journal | WIND ENERGY |
| Volume | 23 |
| Issue number | 6 |
| Publication status | Published - 19 May 2020 |
| Externally published | Yes |
Abstract
In this study, a new damping correction factor is proposed to provide an accurate design response spectrum for megawatt (MW) class wind turbines. The predicted response spectra show good agreement with those by time history analysis (THA). An equivalent modal damping of wind turbine support structures is then proposed for response spectrum method (RSM) based on the modal decomposition method for non-classically damped structures. Seismic loadings on wind turbine towers and footings by RSM with the proposed damping correction factor and equivalent modal damping are also investigated and compared with those by THA. Finally, a quantile value between 0.5 and 0.85 in the damping correction factor is calibrated to ensure the same reliability level as evaluated by THA currently used for estimation of seismic loadings on support structures.
Keywords
- damping correction factor, equivalent modal damping, reliability level, response spectrum method, seismic loading, wind turbine support structure
ASJC Scopus subject areas
Sustainable Development Goals
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In: WIND ENERGY, Vol. 23, No. 6, 19.05.2020, p. 1422-1443.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Prediction of seismic loadings on wind turbine support structures by response spectrum method considering equivalent modal damping of support structures and reliability level
AU - Kitahara, Masaru
AU - Ishihara, Takeshi
N1 - Funding information: This research was carried out as a part of the project funded by Shimizu Corporation, Hitachi Ltd., and ClassNK. The authors express their deepest gratitude to the concerned parties for their assistance during this study.
PY - 2020/5/19
Y1 - 2020/5/19
N2 - In this study, a new damping correction factor is proposed to provide an accurate design response spectrum for megawatt (MW) class wind turbines. The predicted response spectra show good agreement with those by time history analysis (THA). An equivalent modal damping of wind turbine support structures is then proposed for response spectrum method (RSM) based on the modal decomposition method for non-classically damped structures. Seismic loadings on wind turbine towers and footings by RSM with the proposed damping correction factor and equivalent modal damping are also investigated and compared with those by THA. Finally, a quantile value between 0.5 and 0.85 in the damping correction factor is calibrated to ensure the same reliability level as evaluated by THA currently used for estimation of seismic loadings on support structures.
AB - In this study, a new damping correction factor is proposed to provide an accurate design response spectrum for megawatt (MW) class wind turbines. The predicted response spectra show good agreement with those by time history analysis (THA). An equivalent modal damping of wind turbine support structures is then proposed for response spectrum method (RSM) based on the modal decomposition method for non-classically damped structures. Seismic loadings on wind turbine towers and footings by RSM with the proposed damping correction factor and equivalent modal damping are also investigated and compared with those by THA. Finally, a quantile value between 0.5 and 0.85 in the damping correction factor is calibrated to ensure the same reliability level as evaluated by THA currently used for estimation of seismic loadings on support structures.
KW - damping correction factor
KW - equivalent modal damping
KW - reliability level
KW - response spectrum method
KW - seismic loading
KW - wind turbine support structure
UR - http://www.scopus.com/inward/record.url?scp=85081306296&partnerID=8YFLogxK
U2 - 10.1002/we.2494
DO - 10.1002/we.2494
M3 - Article
AN - SCOPUS:85081306296
VL - 23
SP - 1422
EP - 1443
JO - WIND ENERGY
JF - WIND ENERGY
SN - 1095-4244
IS - 6
ER -