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| Parameter identification of the frame structure on elastic foundation based on the cenetic annealing hybrid algorithm |
| Received:March 01, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20091015 |
| KeyWord:genetic algorithm annealing algorithm frame structure soil-structure interaction physical parameter identification |
| Author | Institution |
| 周云 |
湖南大学 土木工程学院,长沙 |
| 易伟建 |
湖南大学 土木工程学院,长沙 |
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| Abstract: |
| In this paper the simple genetic algorithm is improved by syncretizing the ideology of annealing algorithm and the genetic annealing algorithm. GA adopts population parallel search, it based on the idea of 'fitness is survival’ to come into optimization. SA adopts serial structure, the process is endowed with time-variety probability abrupt jumping character, the local limit is prevented and the global optimization is achieved. and the globe searching ability is developed by combining the two methods. The modal test is done on the frame structure on elastic foundation in the laboratory with increasing of the storey, four cases of modal frequencies and vibration shapes are obtained. Firstly the annealing parameter is selected by optimization, the annealing parameter g and disturbance parameterη have important influences on the searching efficieny and global searching ability. Then the four cases of concrete elastic modulus and foundation dynamic shear modulus are identified, and the result is compared with sensitivity-based method, the regulation of the physical parameter increasing with the storey is obtained, the identified elastic modulus of the comcrete is generally larger than by resilience technique and concrete cube compression testing, it may has the relation with the difference of the dynamic modulus and static modulus. The method and its application have important realistic significance to structure’s health monitoring. |
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