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作者:

Zhao, Mi (Zhao, Mi.) | Wang, Xiaojing (Wang, Xiaojing.) | Wang, Piguang (Wang, Piguang.) | Zhang, Chao (Zhang, Chao.) | Du, Xiuli (Du, Xiuli.)

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EI Scopus

摘要:

An accurate frequency domain model is proposed to analyze the seismic response of uniform vertical cylinders with arbitrary cross section surrounded by water. According to the boundary conditions and using the variables separation method, the vertical modes of the hydrodynamic pressure are firstly obtained. Secondly, the three-dimensional wave equation can be simplified to a two-dimensional Helmholtz equation. Introducing the scaled boundary coordinate, a scaled boundary finite element (SBFE) equation which is a linear non-homogeneous second-order ordinary equation is derived by weighted residual method. The dynamic-stiffness matrix equation for the problem is furtherly derived. The continued fraction is acted as the solution of the dynamic-stiffness matrix for cylinder dynamic interaction of cylinder with infinite water. The coefficient matrices of the continued fraction are derived recursively from the SBFE equation of dynamic-stiffness. The accuracy of the present method is verified by comparing the hydrodynamic force on circular, elliptical and rectangle cylinders with the analytical or numerical solutions. Finally, the proposed model is used to analyze the natural frequency and seismic response of cylinders. © 2021, The Author(s).

关键词:

Frequency domain analysis Hydrodynamics Earthquakes Seismic response Surface waves Stiffness Stiffness matrix Circular cylinders Numerical methods

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 ] [Wang, Xiaojing]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Wang, Piguang]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Zhang, Chao]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Du, Xiuli]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 :

Advances in Bridge Engineering

年份: 2021

期: 1

卷: 2

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SCOPUS被引频次: 2

ESI高被引论文在榜: 0 展开所有

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