压力容器Issue(6)：64-69,6.DOI:10.3969/j.issn.1001-4837.2014.06.010
核反应堆厚壁压力容器焊缝TOFD检测缺陷高度分辨率探究
Inquiry of Height Resolution of Heavy Walled Nuclear Reactor Pressure Vessels in TOFD Testing
摘要
Abstract
The height resolution of 220 mm thick nuclear reactor pressure vessels in TOFD ( time of flight diffraction,TOFD) testing was analyzed theoretically,and the function curve of height resolution changed with the buried depth was drawn. When the height of defect was smaller than the height resolution of sys-tem,a method based on spectrum analysis to size the height of a defect was proposed. The method′s effec-tiveness was validated by experiment on three side-drilled hole (22. 5 mm buried,ϕ3. 0 mm;40. 0 mm buried,ϕ2. 0 mm;80. 0 mm buried,ϕ2. 0 mm). The further numerical simulation result demonstrated that the height of a 182. 0 mm buried,ϕ2. 0 mm side-drilled hole can be evaluated accurately by using the spectrum analysis method.关键词
超声衍射时差法/缺陷/高度分辨率/频谱分析Key words
time of flight diffraction( TOFD)/defect/height resolution/spectrum analysis分类
机械制造引用本文复制引用
张树潇,谢雪,刘丽丽,罗忠兵,杨会敏,张东辉,林莉,张贵锋..核反应堆厚壁压力容器焊缝TOFD检测缺陷高度分辨率探究[J].压力容器,2014,(6):64-69,6.基金项目
十二五国防技术基础科研项目(Z0220120001) （Z0220120001）
