基于位移模态叠加法的压力管道腐蚀损伤检测  

Detection of Corrosive Damage to Pressure Pipeline Based on Displacement Mode Superposition Method

作　　者：徐忠成 蒲建国 王晓钢 李刚 赵云峰 王盛辉[2] 郭杏林[2] 

机构地区：[1]大连市锅炉压力容器检验研究院,辽宁大连116013 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《管道技术与设备》2011年第3期48-50,53,共4页Pipeline Technique and Equipment

基　　金：辽宁省质量技术监督局科技计划项目(20076013)

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,给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、识别和优化,实现对缺陷的准确定位。该方法综合考虑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。采用有限元分析软件ANSYS对腐蚀管道进行数值模拟,结果表明经该方法判定的缺陷位置与真实情况相符,充分证明了该方法的有效性。Based on the analytic principle of a vibration modal,aiming at the frequent large-area corrosion defects in pressure pipeline,this paper propose a new NDT method：displacement mode superposition method.The displacement mode superposition method takes the displacement mode as the basic parameter for modal analysis,actualizing the accurate detection of damaged parts through the process of superposition,identification and optimization of modal information.This method considers damaged parts and the sensitive mode in a comprehensive way,improving the damage identification ability of displacement mode methods.Through numerical simulations of pressure pipeline by using FEA software ANSYS,the result is obtained that the opsition with defects predicted by the new method conforms to the real situation,indicating that this method is efficient.

关 键 词：压力管道 腐蚀损伤 模态分析 位移模态 模态叠加法 

分 类 号：TE8[石油与天然气工程—油气储运工程]