Abnormality diagnosis of cracks in the concrete dam based on dynamical structure mutation  

作　　者：GU ChongShi LI ZhanChao XU Bo 

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China [2]National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Nanjing 210098, China [3]College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

出　　处：《Science China(Technological Sciences)》2011年第7期1930-1939,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 51079046, 50909041, 50809025, 50879024);the National Science and Technology Support Plan (Grant Nos. 2008BAB29B03, 2008BAB29B06);the Special Fund of State Key Laboratory of China (Grant Nos. 2009586012, 2010585212);the Fundamental Research Funds for the Central Universities (Grant Nos. 2009B08514, 2010B20414, 2010B14114);China Hydropower Engineering Consulting Group Co. Science and Technology Support Project (Grant No. CHC-KJ-2007-02);Jiangsu Province "333 High-Level Personnel Training Project" (Grant No. 2017-B08037);the Natural Science Foundation of Hohai University (Grant No. 2008426811);Graduate Innovation Program of Universities in Jiangsu Province (Grant No. CX09B_163Z);the Science Foundation for The Excellent Youth Scholars of Ministry of Education of China (Grant No. 20070294023);Dominant Discipline Construction Program Funded Projects of Universities in Jiangsu Province

摘　　要：A method of the fuzzy cross-correlation factor exponent in dynamics is researched and proposed to diagnose abnormality of cracks in the concrete dam. Moreover, the Logistic time series changing from period-doubling bifurcation to chaos is tested first using this method. Results indicate that it can distinguish inherent dynamics of time series and can detect mutations. Considering that cracks in the concrete dam constitute an open, dissipative and complex nonlinear dynamical system, a typical crack on the downstream face of a concrete gravity arch dam is analyzed with the proposed method. Two distinct mutations are discovered to indicate that the abnormality diagnosis of cracks in the concrete dam is achieved dynamically through this method. Furthermore, because it can be directly utilized in the measured crack opening displacement series to complete abnormality diagnosis, it has a good prospect for practical applications.

关 键 词：dynamical structure mutation cracks in the concrete dam method of the fuzzy cross-correlation factor exponent indynamics abnormality diagnosis of cracks 

分 类 号：O415.5[理学—理论物理] TF325.1[理学—物理]