Nonlinearity of mechanical damping of a spring-suspended sectional model system and its influence on the vortex-induced vibration response of a bridge deck

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-03-26 DOI:10.1016/j.jweia.2025.106088

Weimeng Ma , Zhiwen Huang , Xugang Hua , Zhengqing Chen

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Abstract

This paper investigates the nonlinear characteristics of additional damping provided by various damping adjustment methods or devices and the effects of nonlinear mechanical damping of spring-suspended sectional model (SSSM) systems on the vortex-induced vibration (VIV) responses of bridge decks. First, the characteristics of the additional damping provided by three commonly used damping adjustment methods, such as winding electrical tape on the coil springs, installing eddy current dampers, and tying wire rope rings on the coil springs, to the SSSM systems are studied through free vibration tests. Among these methods, the additional damping provided by tying wire rope rings has the strongest nonlinearity, and the stability of the additional damping provided by winding electrical tape is the worst. Next, based on a wake oscillator model, the effects of the nonlinearity of the structural damping on the lock-in regions and maximum VIV amplitudes of different bridge decks are analyzed. Finally, a method for defining the nominal value of the structural damping ratio is proposed, which effectively mitigates the influence of the nonlinearity of the structural damping on the prediction of the maximum VIV amplitude of a main girder, and its rationality is verified through wind tunnel tests.

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弹簧悬挂式断面模型系统机械阻尼的非线性及其对桥面涡流诱发振动响应的影响

本文研究了各种阻尼调节方法或装置提供的附加阻尼的非线性特性，以及弹簧悬架截面模型（SSSM）系统的非线性机械阻尼对桥面涡激振动响应的影响。首先，通过自由振动试验，研究了在线圈弹簧上缠绕电气胶带、安装涡流阻尼器、在线圈弹簧上系绳环三种常用的阻尼调节方法对SSSM系统附加阻尼的特性。其中，系绳环提供的附加阻尼非线性最强，缠绕电气胶带提供的附加阻尼稳定性最差。其次，基于尾流振子模型，分析了结构阻尼非线性对不同桥面锁止区和最大涡激振动幅值的影响。最后，提出了结构阻尼比标称值的确定方法，有效地缓解了结构阻尼非线性对主梁最大涡激振幅预测的影响，并通过风洞试验验证了其合理性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.