A Modeling Method for Soil-FoundationWind Turbine Seismic Analysis Based on Foundation Impedance

WANG Jue; ZHOU Ding

doi:10.21656/1000-0887.390114

Volume 39 Issue 11

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Article Navigation > Applied Mathematics and Mechanics > 2018 > 39(11): 1246-1257

WANG Jue, ZHOU Ding. A Modeling Method for Soil-FoundationWind Turbine Seismic Analysis Based on Foundation Impedance[J]. Applied Mathematics and Mechanics, 2018, 39(11): 1246-1257. doi: 10.21656/1000-0887.390114

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A Modeling Method for Soil-FoundationWind Turbine Seismic Analysis Based on Foundation Impedance

doi: 10.21656/1000-0887.390114

WANG Jue^1,2,
ZHOU Ding³

¹College of Mechanical and Electrical Engineering, Hohai University, Changzhou, Jiangsu 213022, P.R.China;²College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, P.R.China;³College of Civil Engineering, Nanjing Tech University, Nanjing 211816, P.R.China

Funds: The National Natural Science Foundation of China(51708179);China Postdoctoral Science Foundation(2018M632216)

Received Date: 2018-04-11
Rev Recd Date: 2018-05-16
Publish Date: 2018-11-01

Abstract

Abstract

A Chebyshev nested lumped-parameter model (LPM) was proposed to incorporate the frequency-dependent impedances into the time history analysis of soil-foundation-wind turbine systems. The complex Chebyshev polynomials were introduced to approximate the foundation impedances with the least squares curve-fitting technique. The computational program for seismic analysis of the system was developed based on the direct integration of the governing equation in the time domain. The validity and efficiency of the computational program were verified through the comparison examples. The time history analysis of a wind turbine supported by a pile group foundation under seismic excitation shows the universality and stability of the computational program. The advantage of the Chebyshev nested LPM is that it can express the frequency-dependent impedance accurately in the time domain and avoid the high-order numerical oscillation. The nested form of the model enables wider application to different kinds of foundations. In addition, as the present model adopts no mass unit, it avoids the problem of modifying the seismic loading at the node of the foundation and makes the analysis of practical engineering more convenient.
- soil-structure interaction,
- wind turbine,
- lumped-parameter model,
- Chebyshev polynomial,
- seismic response

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References(23)

References

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