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| Dynamic optimization of transmission tower based on H∞ norm |
| Received:June 18, 2014 Revised:September 30, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201505005 |
| KeyWord:transmission tower H∞ norm genetic algorithm seismic response section optimization |
| Author | Institution |
| 张鹏 |
大连理工大学 建设工程学部, 大连 |
| 李宏男 |
大连理工大学 建设工程学部, 大连 |
| 宋钢兵 |
大连理工大学 建设工程学部, 大连 ;美国休斯顿大学 机械工程系, 休斯顿 77004 |
| 张卓群 |
大连理工大学 建设工程学部, 大连 |
| 霍林生 |
大连理工大学 建设工程学部, 大连 |
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| Abstract: |
| The current structural optimization method of the transmission tower is based on static loads and quasi-static loads.The optimization objective is chosen as steel consumption (i.e.the total mass).Frequency characteristics of the dynamic load are neglected.In order to solve the dynamic optimization problem of a transmission tower,a method based on H∞ norm is proposed in this paper.The H∞ norm is selected as the optimization objective.Genetic algorithm (GA) is used to find the optimal solution.The multi-degree-freedom model is adapted to simplify the tower when calculating its H∞ norm.In order that the optimized structure satisfied the static loads and that the total mass is not increased,the penalty function is also introduced to adjust the GA fitness.According to the case study,the proposed method effectively reduced the seismic response of a practical tower,with the static load case satisfied and total mass remains the same.This method avoids calculating the response in the time domain,and thus has high computation efficiency. |
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