基于阻抗函数的土-基础-风机支撑结构地震响应建模方法

王珏; 周叮

doi:10.21656/1000-0887.390114

基于阻抗函数的土-基础-风机支撑结构地震响应建模方法

doi: 10.21656/1000-0887.390114

王珏^1,2,
周叮³

¹河海大学机电工程学院, 江苏常州 213022;²河海大学土木与交通学院, 南京 210098;³南京工业大学土木工程学院, 南京 211816

基金项目: 国家自然科学基金(51708179);江苏省自然科学基金(BK20170299);中国博士后科学基金(2018M632216); 中央高校基本科研业务费（2016B15014）

详细信息

作者简介:
王珏（1988—），女，讲师，博士（通讯作者. E-mail: juewang@hhu.edu.cn).

中图分类号: O32;TU435
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- 被引次数: 0
出版历程
- 收稿日期: 2018-04-11
- 修回日期: 2018-05-16
- 刊出日期: 2018-11-01

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

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)

摘要

摘要: 利用Chebyshev复多项式在数值拟合中的优越性以及递归函数理论，将风机基础的频域阻抗函数等效为可直接用于结构时域分析的Chebyshev递归集总参数模型.并根据d’Alembert(达朗伯尔)原理和时域逐步积分法，利用模型的递归特性编制了地震作用下求解土基础风机支撑结构时程响应的通用程序，通过对比算例验证了程序的有效性和优越性.最后对一个长桩群基础上的风机支撑结构进行了数值计算，研究表明本模型解决了集总参数模型高阶数值震荡的问题，并在求解风机支撑结构地震响应分析中具有稳定性好、通用性强的优点.
- 土-结构相互作用 /
- 风机 /
- 集总参数模型 /
- Chebyshev多项式 /
- 地震响应
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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参考文献(23)

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