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IDENTIFICATION METHOD OF TENSION FORCE USING FINITE ELEMENT ANALYSIS AND SENSITIVITY ANALYSIS
IDENTIFICATION METHOD OF TENSION FORCE USING FINITE ELEMENT ANALYSIS AND SENSITIVITY ANALYSIS
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机译：有限元分析和灵敏度分析的拉力识别方法
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摘要
A method for estimating tension of a bridge cable by finite element analysis and sensitivity analysis is provided to be applied to any cable shape by introducing the finite element analysis, and the sensitivity analysis to increase precision by minimizing an error between an analyzed and measured unique value. Horizontal force, the flexural strength, and axial strength of the cable are set as recognition variables. The finite element analysis is performed to the set recognition variables. Dynamic sag and tension distribution of the cable are obtained from the finite element analysis. A unique vibration frequency of the recognition variables is found by applying vibration analysis to a finite element model having the obtained dynamic sag and tension distribution. A sensitivity matrix, which is a change ratio of the unique vibration frequency according to unit change of each recognition variable, is calculated. A change ratio vector of the unique vibration frequency is calculated. The change ratio vector of the recognition variables is calculated from the sensitivity matrix and the change ratio vector of the unique vibration frequency.
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