南水北调与水利科技2017，Vol.15Issue(5)：141-145,155,6.DOI:10.13476/j.cnki.nsbdqk.2017.05.022
基于传递率函数与信息熵的混凝土坝裂缝损伤识别指标
Crack damage identification index of concrete dam based on transmissibility function and information entropy
摘要
Abstract
The concrete dam's vibration information during operation is hard to be measured accurately.Based on the transmissibility function theory,we applied vibration excitation to the concrete dam,and established the transmissibility function with the dynamic response information.In addition,since the information characteristics and the correlation of the variables can be represented by the information entropy and mutual information,we therefore proposed a new index to identify and locate structural damages.This method extracts damage characteristics directly from response information without obtaining the external vibration excitation information.The simulation and experimental results of the concrete gravity dam showed that when the damage degree was greater than 3%,the index could well realize damage identification and location,and it was suitable for both single damage and multiple damages.With reasonable arrangement of the measuring points according to the structural characteristics,the index can realize local damage identification,and has great practical application value in the damage detection of the concrete dam.关键词
混凝土坝/动力响应/损伤识别/传递率函数/信息熵Key words
concrete dam/dynamic response/damage identification/transmissibility function/information entropy分类
水利科学引用本文复制引用
罗德河,郑东健,胡德华,谢荣晖,甘声玄..基于传递率函数与信息熵的混凝土坝裂缝损伤识别指标[J].南水北调与水利科技,2017,15(5):141-145,155,6.基金项目
国家自然科学基金 (51579085 （）
51279052) （）
江苏省"六大人才高峰"项目(JY-008,JY003) （JY-008,JY003）
国家自然科学基金重点项目(51139001 （）
41323001) （）
中央高校基本科研业务费项目(2015B20714)National Natural Science Foundation of China (51579085 （2015B20714）
51279052) （）
Jiangsu's "Six Talents Summit" Project(JY-008,JY003) （JY-008,JY003）
Key Projects of National Natural Science Foundation of China(51139001 （）
41323001) （）
The Basic Scientific Research Project of Central University(2015B20714) （2015B20714）
