Affiliations: School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China
Correspondence:
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Corresponding author: Jiang Xu, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China. Tel.: +86 2787559332; Fax: +86 2787559332; E-mail:jiangxu@mail.hust.edu.cn
Abstract: The short cable is adopted widely in arch bridges and
suspension bridges. The tension is an important parameter to guarantee the
safety of the bridges in the practical application. Due to the bending
stiffness and boundary condition effects, the tension of short cable is
difficult to achieve accurate measurement using the flexural vibration
method. A feasibility of tension measurement method for the short cable
using steady state longitudinal mode guided waves based on the
magnetostrictive effect is investigated. The major difference between this
method and the magnetostrictive guided wave testing method is that the
steady state response of the cable is employed to measure the tension. The
cable is established the steady state longitudinal vibration with long time
excitation based on the magnetostrictive effect. The longitudinal vibration
is induced based on the inverse magnetostrictive effect. The natural
frequencies of the cable are extracted from receiving data and employed to
estimate the tension. The feasibility experiment results show that the
natural frequencies rapidly increase with increasing the tension in low
level and slightly increase with increasing the tension in high level,
especially in higher modes. The results indicate that the proposed method is
able to measure the tension of the short cylinder structure, but the
relationship between the tension and the natural frequencies is non-linear.
