拉索-阻尼器体系振动索力测量法研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (16) : 123-127.

论文

拉索-阻尼器体系振动索力测量法研究

淡丹辉1，赵一鸣2，陈艳阳3

作者信息 +

Research on the Vibration Measurement based Cable Tension Identification Method for Cable-Damper System

Danhui Dan1, Yiming Zhao2, Yanyang Chen3

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摘要

拉索索力的精确测量是索类结构健康监测的一个重要内容。由于阻尼器的存在，已有的不考虑阻尼器的索力识别方法在测量拉索-阻尼器体系索力时精度将受到影响。利用Steffensen不动点迭代法对的拉索阻尼器系统的频率超越方程进行求解，进而给出了一种新的考虑阻尼器因素的索力识别方法，并给出了该方法和其他三种方法在识别拉索阻尼器系统索力时的相对误差表达式。通过数值仿真，研究了拉索参数和阻尼器参数对各方法的影响，比较了各方法的相对误差范围。研究表明，基于频率超越方程数值解法的索力识别方法是进行拉索-阻尼器系统索力识别时的最佳选择。

Abstract

The measurement accuracy of cable tension is a vital issue on health monitoring of cable stayed structures. The installation of damper on long cables aims to vibration reduction has change the dynamic characteristics of the cable, which will impact on the accuracy when measure the cable tension via vibration method. In this paper, the relative errors expression of cable force identification methods, namely numerical model for cable-damper system with double clamped end, taut string model with double pinned end, taut cable (beam) with double pinned end, and numerical model for taut cable with double clamped end, are presented. By numerical simulation approach, the impact of the parameters of cable and dampers on above cable force identification methods are investigated, the relative error scope of these methods are compared and analysed. The accurate cable force identification methods based on numerical resolution method of frequency transcendental equation of cable damper system are proposed.

导出引用

淡丹辉;赵一鸣;陈艳阳. 拉索-阻尼器体系振动索力测量法研究[J]. 振动与冲击, 2013, 32(16): 123-127

Danhui Dan;Yiming Zhao;Yanyang Chen. Research on the Vibration Measurement based Cable Tension Identification Method for Cable-Damper System[J]. Journal of Vibration and Shock, 2013, 32(16): 123-127