输电塔线体系的动力响应分析
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摘要
以有限单元法为理论依据,建立了较精确的塔线体系模型,先对其进行模态分析,可以得出塔线体系主要振型与单塔振型接近,只是耦合了导、地线的模态;然后对单塔和塔线体系两种模型分别进行地震响应分析,通过对比可以得出:导、地线的存在使输电塔的位移和加速度响应有所减小,在一定程度上起到了类似阻尼器的作用,但因为导、地线的质量不可忽视,塔底支座各个方向的反力并非都减小,设计时应综合考虑输电线对输电塔的影响。
In this paper,accurate model of transmission tower-line system is established according to finite element method theory.Through the modal analysis,the conclusion has been reached that the main vibration mode of transmission tower-line system is close to vibration mode of single tower except coupling the modality of transmission lines.Then it discusses on the transmission lines' effects on transmission tower by means of analysis of seismic response and comparison of the seismic response between the tower-line system and the single tower.Results show that the displacement response decreases due to the transmission tower and the transmission lines to some extent play the role of the damper.Meanwhile the quality of transmission is a factor to be reckoned with,and the bearing reaction of bottom isn't reduced,which is worth of attention in design.
In this paper,accurate model of transmission tower-line system is established according to finite element method theory.Through the modal analysis,the conclusion has been reached that the main vibration mode of transmission tower-line system is close to vibration mode of single tower except coupling the modality of transmission lines.Then it discusses on the transmission lines' effects on transmission tower by means of analysis of seismic response and comparison of the seismic response between the tower-line system and the single tower.Results show that the displacement response decreases due to the transmission tower and the transmission lines to some extent play the role of the damper.Meanwhile the quality of transmission is a factor to be reckoned with,and the bearing reaction of bottom isn't reduced,which is worth of attention in design.
引文
[1]李宏男,石文龙,王苏岩.高压输电塔-导线耦联体系的简化抗震计算方法[J].振动工程学报,2003,16(2):234-237.
[2]曹枚根,徐忠根,刘志勇.大跨越输电钢管组合塔结构动力特性理论分析[J].电力建设,2005,26(12):51-54.
[3]傅永华.有限元分析基础[M].武汉:武汉大学出版社,2003.
[4]王勖成.有限元单元法[M].北京:清华大学出版社,2003.
[5]官玉才,周洪伟,陈璞,等.快速子空间迭代法、迭代Ritz向量法与迭代Lanczos法的比较[J].振动工程学报,2005,18(2):227-232.
[6]侯景鹏,陈家宝,雷俊方.输电塔线体系非线性地震反应分析[J].中国电力,2012,45(11):65-69.
[7]包陈.ANSYS工程分析进阶实例[M].北京:中国水利水电出版社,2019.
[8]丁海丰,张耀春.地震动输入方法研究[J].工程力学,2009(6):1-6.
[9]李宏男,石文龙,贾连光.导线对输电塔体系纵向振动的影响界限及简化抗震计算方法[J].振动与冲击,2004,23(2):1-7.
[2]曹枚根,徐忠根,刘志勇.大跨越输电钢管组合塔结构动力特性理论分析[J].电力建设,2005,26(12):51-54.
[3]傅永华.有限元分析基础[M].武汉:武汉大学出版社,2003.
[4]王勖成.有限元单元法[M].北京:清华大学出版社,2003.
[5]官玉才,周洪伟,陈璞,等.快速子空间迭代法、迭代Ritz向量法与迭代Lanczos法的比较[J].振动工程学报,2005,18(2):227-232.
[6]侯景鹏,陈家宝,雷俊方.输电塔线体系非线性地震反应分析[J].中国电力,2012,45(11):65-69.
[7]包陈.ANSYS工程分析进阶实例[M].北京:中国水利水电出版社,2019.
[8]丁海丰,张耀春.地震动输入方法研究[J].工程力学,2009(6):1-6.
[9]李宏男,石文龙,贾连光.导线对输电塔体系纵向振动的影响界限及简化抗震计算方法[J].振动与冲击,2004,23(2):1-7.
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