Indexed by:期刊论文
Date of Publication:2016-11-16
Journal:岩土力学
Included Journals:EI、CSCD
Volume:38
Issue:2
Page Number:493-500
ISSN No.:1000-7598
Key Words:透明土;熔融石英;粒径;数字图像;激光散斑;测量精度
Abstract:利用透明土技术和激光散斑图像结合数字图像相关方法(DIC方法)测量土体内部的位移场,是研究土力学问题的一种新方法.通过试验研究不同粒径范围的熔融石英颗粒(中细砂0.1～0.3mm、中砂0.3～0.5mm、粗砂0.5～2mm、细砾2～5 mm),揭示粒径对激光散斑图像质量、DIC查询窗口和位移场测量精度的影响.结果表明,不同粒径的熔融石英透明土模型产生的散斑场图像、灰度直方图明显不同;相同入射激光下,小粒径比大粒径模型获得更好质量的散斑图像.位移误差直方图显示,位移误差依赖于查询窗口尺寸和颗粒大小.通过平均灰度梯度调整查询窗口,不同粒径的透明土模型可以给出彼此相当的测量精度.数字和物理平移试验显示,由小粒径石英颗粒配置的透明土模型能够得到更高的测量精度.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:Dalian University of Technology (DUT)
Degree:Doctoral Degree
School/Department:State Key Laboratory of Industrial Equipment for Structral Analysis, Department of Engineering Mechanics
Discipline:Solid Mechanics. Applied and Experimental Mechanics. Engineering Mechanics. Mechanical Manufacture and Automation. Vehicle Engineering. Aerospace Mechanics and Engineering. mechanics of manufacturing process
Business Address:Room 321, Department of Engineering Mechanics
Contact Information:Tel.: 86 0411-84708406 Email: leizk@dlut.edu.cn
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