| 沈祺航,刘小会,闵光云,伍川,张博.温度效应对覆冰导线舞动特征的影响研究[J].计算力学学报,2022,39(6):812~817 |
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| 温度效应对覆冰导线舞动特征的影响研究 |
| Influences of temperature on the galloping characteristics of iced conductor |
| 投稿时间：2021-07-09 修订日期：2021-08-26 |
| DOI：10.7511/jslx20210709001 |
| 中文关键词: 温度效应 非线性舞动 模态 舞动特征 覆冰导线 |
| 英文关键词:temperature effect nonlinear galloping mode galloping characteristics iced conductor |
| 基金项目:国家自然科学基金(51308570;51808085;51507106)资助项目. |
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| 中文摘要: |
| 以某耐张段单跨导线作为研究对象,基于哈密顿原理和增量热场理论,建立了考虑温度效应的覆冰导线非线性舞动模型并推导出其舞动方程。分别使用近似模态和复杂模态得到离散后的面内-面外耦合的有限维度舞动方程,接着采用多尺度法得到该方程的近似解。数值算例研究表明,温度对频率的影响与Irvine参数有关,对张力的影响与初始张力的范围有关,而且降温会增大导线舞动幅值;采用精确模态计算得到的舞动幅值显著小于使用近似模态计算得到的幅值。 |
| 英文摘要: |
| The single span conductor of a tension section is taken as the research object.Based on Hamiltonian principle and incremental thermal field theory,the galloping equations of transmission lines are derived,which consider the effect of temperature on ice-covered conductor.The discrete in-plane and out-of-plane coupled finite dimensional galloping equations are obtained by using approximate and complex modes respectively,then the approximate solutions of the equations are obtained by using the multi-scale method.Numerical examples show that the influence of temperature on the natural frequency is related to the Irvine parameter,the influence on tension is related to the range of initial tension,and the cooling will increase the transverse amplitude of the conductor.The amplitude calculated by using the exact mode is significantly smaller than that calculated by using the approximate mode. |
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