水利水电技术2011，Vol.42Issue(10)：44-49,54,7.
泄流激励下高拱坝原型动力测试的传感器优化布置与参数识别研究
Study on optimal layout and parameter identification of sensors for prototype dynamic test on high arch dam under flood discharge excitation
摘要
Abstract
Taking Ertan Arch Dam as a study case, the optimal layout of sensors for high arch dam is studied herein based on QR decomposition and MAC criterion. Firstly, the QR decomposition is made on the vibration mode of the measurable points obtained on the basis of the finite element modal analysis to determine the initial positions of sensors; secondly, the maximum non-diagonal elements of the MAC matrix are minimized through the gradual accumulation to determine the optimal numbers and positions of the measuring points; finally, the optimal layout of sensors for the prototype dynamic test of Ertan Arch Dam is proposed. Based on the optimized allocation of the sensors, the prototype dynamic test and parameter identification under flood discharge excitation for Ertan Arch Dam are carried out The result shows that the result of the identification after the optimization concerned can not only ensure the accuracy of the identification, but can identify the modal parameters of more high-orders. This method can provide a theoretical reference for the reasonable layout of the measuring points for both the dynamic test and the safety health diagnosis of high arch dam under flood discharge excitation.关键词
QR分解/MAC准则/高拱坝/传感器布置/优化配置/参数识别Key words
QR decomposition/Modal Assurance Criterion/high arch dam/layout of sensors/optimized allocation/parameter identification分类
建筑与水利引用本文复制引用
李火坤,马斌,练继建..泄流激励下高拱坝原型动力测试的传感器优化布置与参数识别研究[J].水利水电技术,2011,42(10):44-49,54,7.基金项目
国家自然科学基金(50909049) （50909049）
江西省自然科学基金(2010GQC0119) （2010GQC0119）
水利部公益性行业科研专项项目(200901081) （200901081）
西部交通建设科技项目(2009328000084)资助. （2009328000084）
