| Autor: |
WEN Yong-kui, LU Wen-liang |
| Zdroj: |
Journal of Vibration Engineering; 2014, Vol. 27 Issue 2, p255-262, 8p |
| Abstrakt: |
Active tuned mass dampers ( A T M D s ) have proved be effective in control of large amplitude buffeting responses of cable-stayed bridges. For carrying out actuator design, a control design model needs to be developed after reduction of complex structural model. To form the control design model mathematical model of combined system of ATMDs and a cable-stayed bridge under wind loads is built firstly. By combining Hankel norms with structural mode analysis, placement indexes of A T - MDs and sensors with definite objective connotation are built respectively considering influence weight of exterior excitation. Then selection index of modes that can indicate controllability and observability for the structural vibration and express contribution degree of exterior excitation is proposed. Based on modal superstition method, accurate designation and composing of modes are realized to form the control design model. Meanwhile the controllability and observability are well kept. Taking the 3rd Nanjing Bridge over Yangtze River under construction as a case study for the buffeting response control, implementation process for the placement of ATMDs and sensors and the selection of modes are provided, and then a control design model of the cable-stayed bridge for buffeting response control is developed. Numerical results show that the dynamic characteristics of the control design mode are in good agreement with that of original system model. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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