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用于核级石墨断裂分析的相位测量技术研究

Research of Phase Measurement Techniques for Fracture Analysis of Nuclear Graphite

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摘要

核级石墨是高温气冷反应堆堆芯的主要构件材料, 石墨材料的断裂性能研究和裂纹扩展过程分析对石墨构件的结构完整性分析具有重要意义。基于径向基函数(RBF)的滤波方法适合于低密度电子散斑干涉(ESPI)图的滤波, 提出基于径向基函数滤波与质量图引导的解包裹算法结合的相位测量方法, 通过模拟相位图对该方法进行验证, 同时将其与传统的均值滤波方法进行定量比较。采用ESPI技术和三点弯曲方法对核级石墨试件的断裂行为进行测量, 实验样本带有预制裂纹, 记录裂纹演化过程中不同载荷下的ESPI包裹相位图, 利用基于径向基函数滤波与质量图引导的解包裹算法获得各个时刻的相位等值线, 给出了试件裂纹演化过程曲线图。结果表明, 该方法可对核级石墨的裂纹演化进行有效的测量。

Abstract

Nuclear graphite is the primary structural material of reactor core in the high temperature gas-cooled reactor. It is of great significance for the research of the graphite′s fracture property and the analysis of the crack propagation process to analyze the structural integrity of graphite component. The filtering method based on radial basis function (RBF) is suitable for electronic speckle pattern interferometry (ESPI) speckle patterns with low density. A kind of phase measuring method base on RBF filtering and quality-guided phase-unwrapping algorithm is proposed, then this method is tested via application to computer-simulated ESPI phase pattern and compared with the average filtering quantitatively. ESPI technique and three-point bending tests are employed to measure the fracture property of nuclear graphite specimen with pre-cracking. The ESPI wrapping phase patterns are recorded with different loads in the evolutionary process of crack, and the phase contours are extracted by the use of RBF filtering method and quality-guided phase-unwrapping algorithm, then the evolutionary process sketch map of the specimen is given. The experimental results demonstrate that this method is effective to measure the crack evolutionary process of nuclear graphite.

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中图分类号:TN247

DOI:10.3788/LOP55.031203

所属栏目:仪器,测量与计量

基金项目:辽宁省自然科学基金(20170540701)、辽宁省教育厅项目(L2015411)

收稿日期:2017-05-18

修改稿日期:2017-08-14

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王琳霖:沈阳航空航天大学工程训练中心, 辽宁 沈阳 110136
曹国强:沈阳航空航天大学工程训练中心, 辽宁 沈阳 110136
王亚杰:沈阳航空航天大学工程训练中心, 辽宁 沈阳 110136
李正强:沈阳航空航天大学工程训练中心, 辽宁 沈阳 110136
王路平:沈阳航空航天大学工程训练中心, 辽宁 沈阳 110136
吴燕燕:沈阳航空航天大学工程训练中心, 辽宁 沈阳 110136

联系人作者:王琳霖(wlin_23@163.com)

备注:王琳霖(1981-), 女, 博士, 高级工程师, 主要从事现代光学测试技术与光信息处理、图像处理等方面的研究。E-mail: wlin_23@163.com

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引用该论文

Wang Linlin,Cao Guoqiang,Wang Yajie,Li Zhengqiang,Wang Luping,Wu Yanyan. Research of Phase Measurement Techniques for Fracture Analysis of Nuclear Graphite[J]. Laser & Optoelectronics Progress, 2018, 55(3): 031203

王琳霖,曹国强,王亚杰,李正强,王路平,吴燕燕. 用于核级石墨断裂分析的相位测量技术研究[J]. 激光与光电子学进展, 2018, 55(3): 031203

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