物理数学力学問題 ー物理現象のモデル化から逆問題までーA

[S01A-02] Simultaneous Estimation Method of Tension, Bending Stiffness and Damper Parameters of Cable with Damper

Aiko Furukawa¹, Shuya Suzuki¹, Ryosuke Kobayashi², *Katsuya Hirose¹ (1. Kyoto University, 2. Shinko Wire Company)

Keywords:Vibration method, Damper, Natural frequency

At present, tension of a bridge cable is generally estimated by the vibration method or high order vibration method which utilizes natural frequencies of a cable. However, this method is not appropriate for a cable with a damper since the damper changes natural frequencies. Authors already proposed an estimation method of cable tension, bending stiffness and damper parameters using natural frequencies. In this paper, a new method is proposed which considers the imaginary part of the eigenvalues and mode shapes in addition to natural frequencies. It was confirmed that the new method has higher accuracy through the experiments.