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Structural Engineering and Mechanics Volume 22, Number 4, March10 2006 , pages 469-481 DOI: https://doi.org/10.12989/sem.2006.22.4.469 |
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Stationary random response analysis of linear fuzzy truss |
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J. Ma, J. J. Chen, W. Gao and Y. Y.Zhao
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| Abstract | ||
| A new method called fuzzy factor method for the stationary stochastic response analysis of fuzzy truss with global fuzzy structural parameters is presented in this paper. Considering the fuzziness of the structural physical parameters and geometric dimensions simultaneously, the fuzzy correlation function matrix of structural displacement response in time domain is derived by using the fuzzy factor method and the optimization method, the fuzzy mean square values of the structural displacement and stress response in the frequency domain are then developed with the fuzzy factor method. The influences of the fuzziness of structural parameters on the fuzziness of mean square values of the displacement and stress response are inspected via an example and some important conclusions are obtained. Finally, the example is simulated by Monte-Carlo method and the results of the two methods are close, which verified the feasibility of the method given in this paper. | ||
| Key Words | ||
| fuzzy truss; stationary stochastic excitation; fuzzy correlation function matrix of displacement response; fuzzy factor method; fuzzy mean square values of structural dynamic response. | ||
| Address | ||
| J. Ma and J. J. Chen; School of Electromechanical Engineering, Xidian University, Xi?n 710071, P. R. China W. Gao; School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW2052, Australia Y. Y. Zhao; School of Electromechanical Engineering, Xidian University, Xi?n 710071, P. R. China | ||