存在内共振的覆冰四分裂导线的非线性舞动

严波; 刘小会; 赵莉; 周林抒

doi:10.3879/j.issn.1000-0887.2014.01.005

存在内共振的覆冰四分裂导线的非线性舞动

doi: 10.3879/j.issn.1000-0887.2014.01.005

¹西安工业大学工程力学系, 西安 710032;²西北工业大学工程力学系, 西安 710129

基金项目: 国家自然科学基金（51277186； 51308570）

详细信息

作者简介:
严波（1965―）,男，重庆人，教授,博士(通讯作者. E-mail: boyan@cqu.edu.cn).

中图分类号: TM752;V211;O322
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出版历程
- 收稿日期: 2013-10-17
- 修回日期: 2013-11-27
- 刊出日期: 2014-01-15

Nonlinear Galloping of Iced Quad-Bundle Conductors With Internal Resonances

¹College of Aerospace Engineering, Chongqing University, Chongqing 400044, P.R.China;²School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, P.R.China

Funds: The National Natural Science Foundation of China(51277168； 51308570)

摘要

摘要: 采用非线性有限元方法模拟研究存在内共振的覆冰四分裂导线的非线性舞动.通过稳定风场和随机风场中典型覆冰四分裂线路舞动过程的数值模拟，研究当覆冰四分裂导线的对称面内模态频率与面外模态频率之比接近于2∶1，即存在内共振条件时，导线的舞动特征.结果表明，存在内共振的覆冰四分裂导线在舞动过程中，其能量在竖直面内运动和横向水平面外运动之间不断交换，与不存在内共振线路的舞动特征差别明显. 研究结果对舞动耦合机理的理解具有重要的理论意义
- 覆冰四分裂导线 /
- 舞动 /
- 内共振 /
- 非线性
Abstract: Galloping of iced quad-bundle conductors with internal resonance was numerically investigated by means of nonlinear finite element method. Based on the numerical simulation of galloping processes of the typical iced quad-bundle conductor lines in both the steady and the stochastic wind fields, galloping characteristics of the iced conductor line with the ratio of the frequency of the first symmetric in-plane mode to the frequency of the out-of-plane mode being 2∶1 were discussed. It is shown that energy continuously interchanges between the vertical motion and transverse horizontal motion as internal resonance exists, which is apparently different from those of the line without internal resonance. The result provides a theoretical basis for the understanding of the coupling mechanism of galloping.
- iced quad-bundle conductor /
- galloping /
- internal resonance /
- nonlinearity

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参考文献(17)

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