作者：陈前昆

作者单位：中船重工第七一三研究所, 河南 郑州 450015

关键词：机械贯穿件;极限载荷;数字散斑相关法;密封性能

摘要：

机械贯穿件的密封性能对保证核电工程安全性至关重要。为分析机械贯穿件在极限载荷作用下的应变变化过程及密封性能，针对机械贯穿件的结构特点，设计一套加载试验装置。在此基础上，分别采用应变片和基于数字散斑相关法的XTDIC系统对贯穿件在极限载荷作用下的形变开展测试工作，并将极限载荷加载后的机械贯穿件置于密封试验装置中，测试其密封性能。研究结果表明，基于三维数字散斑相关法的XTDIC系统在测取复杂应变时精度较低，而位移变形测试精度较高；极限载荷施加过程中，贯穿柱根部应力集中程度高，塑性变形不均匀；极限载荷作用后，贯穿件的小时泄露率为6.6×10^-4 h^-1，满足应用要求。

Research on strain and sealing performance of mechanical penetration under limit load
CHEN Qiankun
The 713 Research Institute of CSIC, Zhengzhou 450015, China
Abstract: The sealing performance of mechanical penetration parts is very important to ensure the safety of nuclear power engineering. In order to analyze the strain change process and sealing performance of mechanical penetration parts under the ultimate load, a set of loading test device is designed according to the structural characteristics of mechanical penetration parts. On this basis, the strain of penetration under the limit load was tested by the strain gauge and the XTDIC test system based on digital speckle correlation method respectively, and loaded mechanical penetration was placed on the sealing test device to test its sealing performance. The result shows that XTDIC system has low strain test precision and high displacement test precision, and during the application of the limit load, the stress concentration throughout the column root is high and the plastic deformation is inhomogeneous, and after the ultimate load, the hourly leakage rate of the mechanical penetration is 6.6×10^-4 h^-1, which could meet the application requirements.
Keywords: mechanical penetration;limit load;digital speckle correlation method;sealing performance
2020, 46(1):160-168  收稿日期: 2019-04-02;收到修改稿日期: 2019-05-30
基金项目:
作者简介: 陈前昆(1989-),男,河南周口市人,助理工程师,硕士,主要从事工程测试工作
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