频率法测量索力中的参数分析与索抗弯刚度的识别

通过有限元法及样条拟合技术获取斜拉索索力与频率的对应关系,并讨论这些关系在频率法测量索力中的应用。在此基础上,以崖门大桥斜拉桥索力测试为研究背景详细分析了频率法测量索力中诸如索的抗弯刚度、支座条件和斜度等参数对索力测试精度的影响,并提出一种基于多阶频率测试结果的斜拉索抗弯刚度识别方法。

Parameter Analysis and Identification of Bending Stiffness of Cables During Tension Measurements by Frequency Method

The relations between cable forces and frequencies are obtained by the combination of finite element method and spline fitting.The application of the above relations to the measurements of cable forces by frequency method is also discussed in this paper.On this basis,the effects of such parameters as bending stiffness,boundary conditions and inclination angles of cables on the accuracy of the tension measurements are analyzed in detail,with the measurements of cable forces of the Yamen Bridge being taken as the research background.An identification method for the bending stiffness of cables is further proposed based on the measured results of the multi-order frequency test.