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作者:

Zhao, Mi (Zhao, Mi.) (学者:赵密) | Du, Xiu-Li (Du, Xiu-Li.) (学者:杜修力)

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摘要:

Two new types of high-order lumped-parameter models (LPMs) for foundation vibrations are proposed. The parameters of LPMs are obtained by comparing the continued-fraction dynamic-stiffness equations of new LPMs with the continued-fraction expansions of a rational function in complex frequency approximating foundation frequency response. Compared with the existing high-order LPMs, the proposed LPMs are easier to extend to high orders, and their physical configurations are condensed and independent of the problem analyzed. Moreover, due to the dynamic equations of LPMs with second-order derivative terms in time, the resulting structure-foundation-soil system can be solved by an explicit time-integration method. The effectiveness of the proposed LPMs is verified by analyzing the benchmark problem of semi-infinite rod on an elastic foundation and comparing with the results of Wu-Lee LPMs.

关键词:

Foundations Rational functions Lumped parameter networks Geotechnical engineering Frequency response

作者机构:

  • [ 1 ] [Zhao, Mi]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China
  • [ 2 ] [Du, Xiu-Li]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

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来源 :

Chinese Journal of Geotechnical Engineering

ISSN: 1000-4548

年份: 2009

期: 11

卷: 31

页码: 1744-1751

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