Structural physical parameter identification based on evolutionary-simplex algorithm and structural dynamic response |
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| Authors: | Email author" target="_blank">Du?Xiuli?Email author Zeng?di |
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| Institution: | 1. Beijing University of Technology, Beijing 100022, China
2. China Institute of Water Resources and Hydropower Research, Beijing 100044, China |
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| Abstract: | Evolutionary computation based on the idea of biologic evolution is one type of global optimization algorithm that uses self-adaptation, self-organization and random searching to solve optimization problems. The evolutionary-simplex algorithm is introduced in this paper. It contains floating encoding which combines the evolutionary computation and the simplex algorithm to ovcrcomc the problems encountered in the genetic algorithm and evolutionary strategy methods.Numerical cxpcrimcnts arc performed using seven typical functions to verify the algorithm. An inverse analysis method to identify structural physical parameters based on incomplete dynamic responses obtained from the analysis in the time domain is prcscntcd by using the evolutionary-simplex algorithm. The modal evolutionary-simplex algorithm converted from the time domain to the modal domain is proposed to improve the inverse efficiency. Numerical calculations for a 50-DOF system show that whcn compared with other methods, the evolutionary-simplex algorithm offers advantages of high precision,cfficient searching ability, strong ability to resist noise, independence of initial value, and good adaptation to incomplete information conditions. |
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| Keywords: | modal paramcter physical parameter inverse analysis evolutionary-simplex algorithm |
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