Modal Parameter Identification and Dynamic Monitoring of High Arc Dam under Response of Flow Discharge

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (9) : 146-150.

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Modal Parameter Identification and Dynamic Monitoring of High Arc Dam under Response of Flow Discharge

ZHANG Jian-wei1;Kang Ying-bing1;Zhang Yi-na2;ZHAO Yu1

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Abstract

Correct modal parameter identification is one of the difficulties and cores for online structural damage diagnosis and health monitoring. Based on the prototype test of Ertan arc dam, combined with stochastic subspace identification algorithm and improved stabilization diagram, the modal parameters of arc dam under flow discharge are identified effectively, and also long-term online monitoring of the high dam is realized, so it offers evidence for structural health evaluation. Aimed at noise problem and the consequent identification and elimination of false modal parameters, and the order-determined problem as well in time domain, improved stabilization diagram is put forward to make more precise results, and the results is compared with the results with ERA method . Study shows that the new approach has excellent character and fine precision, and also has good prospect applied to engineering.

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modal parameter identification / stochastic subspace identification algorithm / stabilization diagram / Dynamic Monitoring

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ZHANG Jian-wei;Kang Ying-bing;Zhang Yi-na;ZHAO Yu. Modal Parameter Identification and Dynamic Monitoring of High Arc Dam under Response of Flow Discharge[J]. Journal of Vibration and Shock, 2010, 29(9): 146-150