摘要
为研究输电铁塔及塔线体系的动态特性,运用ANSYS建立1D2-SZ2型铁塔单塔和"两塔三线"模型.采用有限元法对导线进行找形分析,研究了单塔和塔线体系的固有模态.结果表明,有限元计算的导线弧垂和应力值结果与理论值基本一致,有限元法能够准确地进行导线找形;单塔和塔线体系具有振型多样性的特点,单塔局部振型集中在塔身及横断面附近,应注意结构补强设计;塔线体系在低阶模态为导地线振型,较好验证了导线刚度小于铁塔刚度,为进一步研究塔线体系下风荷载,地震等动态特性具有指导意义.
In order to study the dynamic characteristics of transmission tower and tower-line system,the ANSYS is used to establish the 1D2-SZ2 single tower and the＂two towers and three lines＂model.Natural modes of the tower and the tower-line system are studied and using the finite element method to research the conductor form-finding.The results show that the method can accurately do transmission line form-finding because of the sag and stress values are consistent with the theoretical values.Single tower and tower-line system have the characteristics of diversity of modes.Single tower partial modes centered around the tower and cross-section should be noted in structural reinforcement design.Tower-lines system in the lower modes of vibration mode on conductor and ground wire and;it is verified that the conductor stiffness rigidity is less than the tower one.For further study tower-line system under wind loads,earthquake and other dynamic properties,the study has guiding significance.
出处
《三峡大学学报（自然科学版）》
CAS
2016年第3期69-72,80,共5页
Journal of China Three Gorges University：Natural Sciences
基金
新能源电力系统国家重点实验室开放基金(LAPS14016)
关键词
导线找形
塔线耦合体系
模态分析
动态特性
form-finding
tower-line coupling system
modal analysis
dynamic characteristics
