回顾与讨论气动导纳函数（英文）

被引：0

作者：

Lin ZHAO ^{[1
,2
]}

Xi XIE ^{[1
]}

Teng WU ^{[3
]}

Shaopeng LI ^{[3
]}

Zhipeng LI ^{[4
]}

Yaojun GE ^{[1
,2
]}

Ahsan KAREEM ^{[5
]}

机构：

[1] State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University

[2] Key Laboratory of Transport Industry of Wind Resistant Technology for Bridge Structures,Tongji University

[3] Department of Civil,Structural and Environmental Engineering,University at Buffalo

[4] School of Civil Engineering,Central South University

[5] Department of Civil & Environmental Engineering & Earth Sciences,University of Notre

来源：

Journal of Zhejiang University-Science A(Applied Physics & Engineering) | 2020年 / 07期

关键词：

气动导纳函数; 桥梁断面; 抖振分析; 风洞试验; 灵敏度分析;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

目的:提出一种识别桥面气动导纳函数的理论框架并验证其合理性。方法:1.提出一种考虑来流脉动风和气动力全部交叉分量贡献的全分量导纳函数的识别算法。2.利用风洞试验与数值分析结合的方法,对一组流线型和钝体断面的气动导纳进行验证。3.对一桥梁断面进行抖振响应分析,验证其等效气动导纳。结论:1.通过数值计算,系统地验证了本文所提出的等效气动导纳函数具有较高的保真度。2.风洞中流线型断面的等效气动导纳函数的辨识结果与随机子空间辨识方法的结果吻合良好。3.通过对一组流线型和钝体断面进行气动导纳识别表明,某些断面的气动导纳高于基于准定常理论的所得值。4.根据准定常理论下的气动导纳函数、Sears函数和实验验证的函数计算抖振响应并与风洞试验结果进行比较发现,对于流线型断面,采用Sears函数或等效气动导纳函数都是合理的,而用准定常理论得到的抖振响应则过于保守。5.灵敏度分析表明,抖振响应对平均风速、气动导纳函数、静风力系数及其导数和颤振导数等参数非常敏感。

引用

页数：18

共 17 条

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