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《Highfrequency Load Identification of Complex Structural Coupling System》

XUE Yong-gang;XIE Shi-lin;ZHANG Xi-nong

2010, 30 (2): 96-98. DOI: 10.3969/j.issn.1006-1355.2010.02.096

Abstract （1989）

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The paper investigates the load identification of a threeplate coupling system based on the statistical energy analysis theory. Firstly, the stable power injection method is employed to identify the inner loss factors and the coupling loss factors of substructures, in which the indirect coupling characteristics are considered. Based on the established power flow balance equation of the system, the identification of concentrated load is conducted. The results show that, in the highfrequency range, the identified input power agrees well with the measured input power. The work presented in the paper provides a theoretical reference for load identification of structures in the high frequency domain.

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《Distributed Load Identification of Structures Based on Surface Mobility》

JIN Ya-feng;XIE Shi-lin;ZHANG Xi-nong

2009, 29 (6): 37-39. DOI: 10.3969/j.issn.1006-1355.2009.06.037

Abstract （2586）

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The concept of surface mobility is introduced to study the identification of distributed loads based on SEA in the paper. The expressions of average surface mobility for the finite plate are derived. By discretizing the acting area, a numerical computation method for average surface mobility is developed. Finally, combining with the complex power method, an identification approach of load power spectrum of distributed loads from the input power of subsystem is set up. The proposed method is validated numerically through an example.

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《An Optimization Method of Load Identificationin Frequency Domain》

HU Jie;ZHANG Xi-nong

2009, 29 (6): 34-36. DOI: 10.3969/j.issn.1006-1355.2009.06.034

Abstract （2592）

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This paper proposed a new method of load identification based on optimization theory, the load spectrum is calculated by genetic algorithm, if the error between responses produced by this calculated load and have been measured is small enough, the optimized load spectrum could be considered as the real excitation，the numerical simulation result shows the effectiveness of this optimization method.