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吊索动力特性分析方法与工程应用

Analysis Method and Engineering Application of Sling Dynamic Characteristics
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摘要 吊索作为索承桥梁的重要受力构件,决定着桥梁的承载力和耐久性,研究其动力特性对悬索桥和拱桥的设计和运营维护具有极大意义。首先运用动刚度法(DSM)得到了吊索在任意边界条件下的频率方程,并结合Wittrick-Williams(W-W)算法,提出了吊索振动模态频率精确的计算方法,形成了一套适用于吊索动力特性分析的精细化分析理论;其次利用模型参数退化、文献方法以及有限元建模求解来进行准确性验证;最后通过与明州大桥实测数据对比表明该分析理论在实际工程中具有较好的可行性。该理论体系为吊索动力特性的进一步研究提供了参考,并在一定程度上指导实际工程吊索的设计和监测。 As an important load-bearing component of cable-supported bridge,the sling determines the bearing capacity and durability of bridge.The study of its dynamic characteristics is of great significance for the design,operation and maintenance of suspension bridge and arch bridge.Firstly,by using the frequency equation of the sling under arbitrary boundary conditions obtained by the dynamic stiffness method(DSM),and combined with the Wittrick-Williams(W-W)algorithm,an accurate method for calculating the vibration modal frequency of the sling is proposed,and a set of refined analysis theory suitable for the dynamic characteristics analysis of the sling is formed.Secondly,the accuracy of the method is verified by utilizing the model parameter degradation,literature methods and finite element modeling solutions.Finally,through the comparison with the measured data of Mingzhou Bridge,it is shown that the analysis theory has the good feasibility in practical engineering.This theoretical system provides a reference for further research on the dynamic characteristics of slings,and to some extent,guides the design and monitoring of slings in practical engineering.
作者 廖霞 顾民杰 赵荣欣 淡丹辉 韩飞 LIAO Xia;GU Minjie;ZHAO Rongxin;DAN Danhui;HAN Fei
出处 《城市道桥与防洪》 2024年第10期255-259,M0024,共6页 Urban Roads Bridges & Flood Control
关键词 吊索 动力特性 动刚度法 Wittrick-Williams算法 模态频率 slings dynamic characteristics dynamic stiffness method Wittrick-Williams algorithm modal frequency
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