摘要
为了分析利用磁记忆检测技术进行管道在线内检测的可行性,需要分析压力对管道缺陷磁记忆信号的影响。在J-A力磁耦合模型基础上得出相对磁导率与应力的数值关系,在Ansys软件中导入相对磁导率与应力的关系进行力学与静磁学联合仿真。研究结果表明:缺陷磁记忆信号有两个特点——径向磁场产生最小值到最大值的突变,轴向磁场出现最大值。在压力作用下管道内部背景磁场减小,缺陷磁记忆信号随着压力增大先减小后保持不变,可以利用磁记忆检测技术进行管道在线内检测。
In order to analyze the feasibility of using magnetic memory testing technology to pipeline online inspection,it＇s necessary to consider the effect of pressure on the pipeline defects magnetic memory signals. Based on the J-A force-magnetic coupling model a relationship between the relative permeability and stress was concluded. The relationship was imported in ANSYS software to carry out the co-simulation between mechanical and static magnetic. The results show that magnetic memory signals of defects have two characteristics—— radial magnetic field in the pipeline mutating from minimum to maximum and axial magnetic field appearing maximum. The magnetic field inside the pipeline decreases and defect＇s magnetic memory signals decreases and then remains constant when the pressure increases. Magnetic memory testing technology can be used in pipeline online inspection.
作者
唐玉莲
陈世利
黄新敬
杨雨涵
TANG YuLian;CHEN ShiLi;HUANG XinJing;YANG YuHan(State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072, Chin)
出处
《机械强度》
CAS
CSCD
北大核心
2018年第2期306-311,共6页
Journal of Mechanical Strength
基金
国家自然基金面上项目(61473205)
天津市科技兴海项目(KJXH2013-06)资助~~
关键词
压力
管道
缺陷
磁记忆信号
力磁耦合
ANSYS
Pressure
Pipeline
Defect
Magnetic memory signal
Force-magnetic coupling
ANSYS
