摘要
为将磁记忆检测技术应用于高压设备法兰螺栓的应力检测,在螺栓拉伸试验台上对螺栓进行静拉伸试验研究。用巨磁阻磁记忆检测探头检测螺栓不同部位的磁记忆信号,结合螺栓拉伸应力的三维ANSYS模拟,确定螺栓磁化强度变化最灵敏的检测部位。分析了3种规格螺栓在拉伸载荷下磁记忆信号切向分量梯度平均值的量化特点,分析结果表明,高压容器螺栓应力的磁记忆信号检测技术可以准确监测到升压过程中各螺栓的受力情况,反映法兰盘的预紧力分布,同时还可以监测高压设备冲击载荷造成的压力波动;进入保压阶段后,磁记忆信号的平稳性则可以反映出设备工作的稳定性。
To apply metal magnetic memory （MMM） testing technology to the stress detection of the high pres- sure equipment flange bolt, the static tensile experimental study of bolt was carried out on the bolt tensile test bench. The giant magnetoresistance memory detecting probe was used to inspect the MMM signals in the different parts of bolt. Referring to the three-dimensional Ansys simulation of bolt＇s tensile stress, the most sensitive testing part of bolt＇s magnetization strength variation was determined. The quantitative feature of the average value of the MMM signal tangential component gradient for bolts of three specifications was analyzed under tensile load. The re- search findings show that MMM signal testing technology for the bolt stress of high pressure vessel can precisely monitor the force condition of bolts in the boosting process, reflecting the pre-tightening force distribution of flange plate. Meanwhile, it can monitor the pressure fluctuation caused by the impact load of high pressure equipment. After pressure maintaining, the MMM signal smoothness can reflect the working stability of the equipment.
出处
《石油机械》
北大核心
2014年第1期37-39,43,共4页
China Petroleum Machinery
基金
中石油安全环保关键技术研究与推广项目之子课题"油气钻采地面高压设备安全监测与评估技术研究"(2011D-4602-0103)
关键词
法兰
螺栓
拉伸载荷
磁记忆信号
切向分量
检测
flange
bolt
tensile load
MMM signal
tangential component
detection
作者简介
第一作者简介：徐鹏谊，生于1988年，中国石油大学（北京）机械工程专业在读硕士研究生，现从事井口设备安全检测与机械设计方面的研究工作。地址：（102249）北京市昌平区。E-mail：laipan1999@163．com。
