| 桥塔涡激共振可靠性简化计算方法 |
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| 引用本文： | 周宝勇,余建星,郭君,周清基. 桥塔涡激共振可靠性简化计算方法[J]. 地震工程与工程振动, 2011, 31(4): 127-131 |
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| 作者姓名： | 周宝勇 余建星 郭君 周清基 |
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| 作者单位： | 1. 天津大学港口与海洋工程教育部、天津市重点实验室,天津,300072
2. 中国船舶重工集团第七零五研究所,陕西西安,710075 |
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| 基金项目： | 国家高技术研究发展(863)计划资助项目，国家自然科学基金创新研究群体科学基金项目 |
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| 摘 要： | 针对桥塔在风载荷下的涡激共振可靠性问题,在涡激振动机理与频率锁定现象研究基础上,提出一种计算桥塔涡激振动可靠性的简化方法.将临界风速结合Re数和Strouhal数建立涡激共振下桥塔安全裕度方程,并引入AFOSM求解方法解决非线性问题,利用MATLAB进行可靠性求解程序编制,在保证计算精度的同时大大降低了桥塔涡激振动可靠...
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| 关 键 词： | 桥塔 涡激共振 频率锁定 可靠性 AFOSM |
Simplified calculation method for reliability analysis of vortex excited vibration of bridge tower |
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| ZHOU Baoyong,YU Jianxing,GUO Jun,ZHOU Qingji. Simplified calculation method for reliability analysis of vortex excited vibration of bridge tower[J]. Earthquake Engineering and Engineering Vibration, 2011, 31(4): 127-131 |
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| Authors: | ZHOU Baoyong YU Jianxing GUO Jun ZHOU Qingji |
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| Affiliation: | 1(1.Key Lab of Port and Ocean Engineering,Ministry of Education,Tianjin University,Tianjin 300072,China;2.The 705 Research Institute of CSIC,Xi′an 710075,China) |
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| Abstract: | To evaluate the reliability of bridge tower vortex excited vibration induced by wind,a simplified calculation method is proposed on the basis of the research on vortex induced vibration mechanism and the phenomenon of frequency locking.The safety margin equation is derived by critical wind speed with Re number and Strouhal number.A non-linear solving program for reliability analysis based on AFOSM theory and MATLAB is programmed.By using the reduction method of this paper,with satisfactory calculation accuracy,the calculation difficulty of reliability analysis for bridge tower vortex excited vibration is overcome.Its calculation time is saving.This calculation method has been used in the Haihe Jizhao Bridge project.The results show that this simple calculation method is reliable. |
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| Keywords: | bridge tower vortex inspiriting vibration frequency locking reliability analysis AFOSM |
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