【作者】 徐忠成； 金健； 王晓钢； 李鸿雁； 赵云峰； 王盛辉； 郭杏林；

【Author】 Xu Zhongcheng~1 Jin Jian~1 Wang Xiaogang~1 Li Hongyan~1 Zhao Yunfeng~1 Wang Shenghui~2 Guo Xinglin~2 (1.Dalian Boiler and Pressure Vessel Inspection Institute; 2.National Key Laboratory For Structural Analysis of Industrial Equipment Dalian University of Technology)

【机构】 大连市锅炉压力容器检验研究院； 大连理工大学工业装备结构分析国家重点实验室；

【摘要】 基于结构模态分析原理,针对压力管道中常见的大面积腐蚀缺陷,本文提出了一种新的无损检测方法——位移模态叠加法。位移模态叠加法以位移模态作为模态分析的基本参数,通过对模态信息进行叠加、识别、优化的过程,实现对缺陷的准确定位。该方法综合考虑到缺陷位置及敏感振型对参数识别的影响,有效提高了位移模态方法的损伤识别能力。通过模态实验对腐蚀管道进行检测,结果表明经该方法判定的缺陷位置与真实情况完全相符,从而对该方法的有效性进行了充分论证。更多还原

【Abstract】 this paper proposes a new NDT method-Displacement Mode Superposition Method with respect to the commonly seen large-area corrosion defects on pressure pipeline based on the principle of vibration modal analysis.Displacement mode superposition method takes displacement mode as the basic parameter for modal analysis to realize accurate location of the defect through the process of superposition,identification and optimization of modal information.This method comprehensively considers the effect of defect position and sensitive mode on parameter identification,thus improves the damage identification ability of the displacement mode method.Through the inspection of the corroded pipeline by mode test,the results show that the defect position judged by the new method fully agrees with the real situation,which sufficiently verifies the effectiveness of this method.更多还原