Cable Force Detection Based on Variable Sensitivity Analysis

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (7) : 256-260.

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Cable Force Detection Based on Variable Sensitivity Analysis

Chen Yan-jiang; Cheng Jian-qi; Yan Wei-ming; He Hao-xiang; Li Yong

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Abstract

Taking into account the new construction technique and complex anchorage, The proposed method takes the tension force, flexural rigidity and length as unknown parameters, analyzes the sensitivity of parameters to natural frequencies. The algorithm based on sensitivity-updating is able to simultaneously identify the tension force, flexural rigidity and length. Next, the method is applied to four different hanger rods system, and it is approved that the proposed method not only has high accuracy, but also be applicable to the rods with high bending stiffness. At last, a testing on a CFST tied arch bridge proved the method is field applicable.

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hanger rod / cable tension / frequency / flexural rigidity / sensitivity

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Chen Yan-jiang; Cheng Jian-qi; Yan Wei-ming; He Hao-xiang; Li Yong. Cable Force Detection Based on Variable Sensitivity Analysis[J]. Journal of Vibration and Shock, 2011, 30(7): 256-260