| 练继建,马斌,李福田.高坝流激振动响应的反分析方法[J].水利学报,2007,38(5):575-581 |
| 高坝流激振动响应的反分析方法 |
| Back analysis algorithm for response of flow induced vibration in overflow high dam |
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| DOI： |
| 中文关键词: 流激振动 反分析 遗传算法 动力响应 |
| 英文关键词: flow induced vibration back analysis algorithm genetic algorithm dynamic response |
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| 摘要点击次数: 1877 |
| 全文下载次数: 209 |
| 中文摘要: |
| 为分析高速水流诱发高坝泄流结构的振动问题，根据结构动力学、随机振动理论和最优方法的基本理论，提出了基于谱分析及遗传算法的振源反分析方法，采用本文方法，可以由少量测点的动位移实测值反馈分析出各激振源等效荷载谱，通过流激振动响应的正分析方法得到整个结构在水流动力荷载作用下的动力响应，对水工结构的流激振动进行正确全面的评估，为结构损伤动态监测和诊断提供新的技术手段。并通过拉西瓦拱坝泄洪水弹性模型试验实测值与反分析计算值的比较验证了本文方法的合理性。 |
| 英文摘要: |
| A back analysis method based on spectrum analysis and genetic algorithm is proposed for studying the flow induced vibration of overflow high dam. By using this method the equivalent load spectrums of various vibration sources are back analyzed according to the in situ measured deformations at some typical positions. On this basis, the dynamic response of the whole structure to dynamic load and stress due to overflow can be further analyzed. This analysis helps to comprehensively evaluate the flow induced vibration of the dam and provides a new method for dynamic monitoring and diagnosis of the damage of structures. This method is applied to analyze the experimental data obtained from the hydro elastic model of the Laxiwa high over flow arch dam in laxiwa project. The result verifies the feasibility of the proposed method. |
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