数字图像应用于疲劳监测的测量参数研究 张玉玲.pdf

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钢结构(中英移参数的形态和应用可行性；对比静载试验中电测应变片与图像应变测量结果，确定非接
触式数字图像测量满足应用精度要求；研究试件疲劳过程的应变和位移变化规律，对图像的各种数据进行疲劳过程敏
感性分析，研究最优参数指标，确定特征点数据提取方案；验证数字图像技术应用于疲劳监测的可行性和实施方案，
兼顾客观性和自动化。研究表明，通过 ARAMIS 三维数字图像测量系统能够非接触动态采集测量表面的图像数据，
获取其中任意点的三维应变值和位移值满足精度要求；采用提取截面线均值方法能够有效获取钢构件截面名义应变；
通过 ARAMIS 三维数字图像测量系统能够动态采集测量表面的应变图像数据，获取其中任意点的三维应变值和位移
值，由位移指标得到的疲劳异常信息相对较晚，不适合作为疲劳监测的测量参数；确定采用数字图像的应变参数进行
疲劳监测具有可行性，提出可在应变等值云图上截取最大应变特征值作为疲劳监测数值系列。所得到的测量数据客观
有效、实施性强，是数字图像应用于疲劳监测的最优测量参数。
关键词 黑白散斑；应变；疲劳试验；ARAMIS 光学测量系统
TEST RESEARCH ON MEASUREMENT PARAMETERS OF DIGITAL IM
AGE APPLIED TO FATIGUE MONITORING
Zhang Yuling1,2 ,3 ,4 Xie Aihua5 Yang Yuntao3 , 4 Gao Zhanjun5 Zhang Nan4 Zhang Xianqing2 Dong Jialin2
( Academy of Railway Sciences Co., Ltd, Beijing 100081, China;
Shuzhi Jiaoyuan Technology Co., Ltd, Hangzhou 310030, China;
Shuren University, Hangzhou 310015, China;
Jiaotong University, Beijing 100044, China;
Railway Fifth Survey and Design Institute Group Co., Ltd, Beijing 102600, China)
Abstract Fatigue monitoring of steel structure is an important part of steel structure health monitoring system. In recent
years, under the rapid development of image acquisition and data remote transmission technology, the application of non -
contact digital image measurement technology in fatigue monitoring has attracted the attention. Aiming at the application
requirements of three-dimensional digital image technology (3D-DIC) in fatigue monitoring, Q345qD steel specimens were
designed and processed for fatigue test. During the test, the ARAMIS optical measurement system was used to take pictures of
the observation area dynamically and co