Structural Engineering and Mechanics

  • 제10권4호
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  • Pages.359-369
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  • 2000
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Random loading identification of multi-input-multi-output structure

  • Zhi, Hao (Department of Mechanical Engineering, Northern Jiaotong University) ;
  • Lin, Jiahao (Department of Mechanics, Dalian University of Technology)
  • 발행 : 2000.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

Random loading identification has long been a difficult problem for Multi-Input-Multi-Output (MIMO) structure. In this paper, the Pseudo Excitation Method (PEM), which is an exact and efficient method for computing the structural random response, is extended inversely to identify the excitation power spectral densities (PSD). This identified method, named the Inverse Pseudo Excitation Method (IPEM), resembles the general dynamic loading identification in the frequency domain, and can be used to identify the definite or random excitations of complex structures in a similar way. Numerical simulations are used to reveal the the difficulties in such problems, and the results of some numerical analysis are discussed, which may be very useful in the setting up and processing of experimental data so as to obtain reasonable predictions of the input loading from the selected structural responses.

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참고문헌

  1. Bathe, K.J. and Wilson, E.L. (1976), Numerical Methods in Finite Element Analysis, Prentice-Hall, N.J.
  2. Bendat, J.S. and Piersol, A.G. (1980), Engineering Application of Correlation and Spectral Analysis, Wiley-Interscience Publication, John Wiley and Sons.
  3. Dobson, B.J. and Rider, E. (1990), "A review of the indirect calculation of excitation forces from measured structural response data", Proc of the Instn of Mech Engrs (IMechE), Part C: .Journal of Mechanical Engineering Science, 204, 69-75.
  4. Lin, J.H. (1992), "A fast CQC algorithm of PSD matrices for random seismic response", Comput. Struct., 44, 683-687. https://doi.org/10.1016/0045-7949(92)90401-K
  5. Lin, J.H., Zhang, W.S. and Li, J.J. (1994), "Structural responses to arbitrarily coherent stationary random excitations", Comput. Struct, 50, 629-633
  6. Nigam, N.C. (1983), Introduction to Random Vibration, MIT Press, Cambridge.
  7. Wilkinson, J.H. and Reinsch, C. (1971), Linear Algebra (Volume II), Springer-Verlag, Berlin, Heidelberg, New York.
  8. Zhang, J.H. and Wang, C (1988), Theory of Engineering Random Vibration, Press of Xian Jiaotong University, Xian, China
  9. Zhong, W.X. (1996), "Review of a high-efficiency algorithm series for structural random response", Progress in Natural Sciences, 6, 257-268.