东南大学学报（自然科学版）2012，Vol.42Issue(4)：724-728,5.DOI:10.3969/j.issn.1001-0505.2012.04.028
考虑减振装置弹簧刚度的斜拉索等效索长及索力测量
Equivalent length of stayed-cable considering spring stiffness of damping device and measurement of cable-force
黄侨 1胡健琛 1黄志伟 2陈晓强1
作者信息
- 1. 东南大学交通学院,南京210096
- 2. 上海市政工程设计研究院,上海200092
- 折叠
摘要
Abstract
To improve measure precision on force of stayed-cable with damping device, equivalent hinge method (EHM) is proposed for calculating equivalent length. Based on string vibration theory used by vibration frequency method for measuring cable-force, impact of spring stiffness of damping device upon boundary condition of stayed-cable is considered. The relationship between spring stiffness and equivalent length is seriously considered. Taking the impact into account, a modified formula is put forward for calculating the secondary equivalent length of cable. After comparing the collected data of cable-force and the numerical results of universal finite element software ANSYS to simulate vibrating cable, correctness and applicability of the method are verified. The results show that equivalent length is one of the key parameters which can affect the precision of measuring cable-force ; when installation situation of damping device is different, both force and fundamental frequency of cable are changed to a certain degree; the precision of measuring cable-force is improved by the proposed method effectively; the suggested method is more practicable for shorter cable. It is argued that the method can be applied for controlling cable-forces of cable-stayed bridge at construction stage or finished stage.关键词
斜拉索索力/振动频率法/等效索长/减振装置/弹簧刚度/铰接等代法Key words
cable-force/ vibration frequency method/ equivalent length of stayed-cable/ damping device/ spring stiffness/ equivalent hinge method (EHM)分类
交通工程引用本文复制引用
黄侨,胡健琛,黄志伟,陈晓强..考虑减振装置弹簧刚度的斜拉索等效索长及索力测量[J].东南大学学报（自然科学版）,2012,42(4):724-728,5.
