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Structural Engineering and Mechanics
  Volume 10, Number 4, October 2000 , pages 359-369

Random loading identification of multi-input-multi-output structure
Zhi H, Lin JH

    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.
Key Words
    random, loading, identification, simulation, vibration
Zhi H, No Jiaotong Univ, Dept Mech Engn, Beijing 100044, Peoples R China
No Jiaotong Univ, Dept Mech Engn, Beijing 100044, Peoples R China
Dalian Univ Technol, Dept Mech, Dalian 116032, Peoples R China

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