基于休哈特控制图的磁记忆早期损伤检测方法
发布时间：2019-05-24 21:54
【摘要】：为完善金属磁记忆检测早期损伤的定性定量评价方法,开展Q235钢圆棒试件扭转试验。利用应力集中磁指示仪,记录不同扭矩作用下的试件表面的磁记忆信号的切向分量Hx和法向分量Hy。进而提出基于休哈特控制图的磁记忆信号早期损伤检测方法。结果表明,磁信号在试件屈服时发生明显跳变,此时合成磁场梯度绝对值正好达到最大;借助休哈特控制图,能消除梯度值波动对信号判断的干扰,并能给出试件产生屈服时的准确异常预警范围,从而较好地实现磁记忆早期损伤的快速准确识别。
[Abstract]:In order to perfect the qualitative and quantitative evaluation method of early damage detected by metal magnetic memory, the torsional test of Q235 steel round rod specimen was carried out. The tangential component Hx and the normal component Hy. of the magnetic memory signal on the surface of the specimen under different torque are recorded by using the stress concentration magnetic indicator. Furthermore, an early damage detection method of magnetic memory signal based on Shewhart control chart is proposed. The results show that the magnetic signal jumps obviously when the specimen yield, and the absolute value of the synthetic magnetic field gradient reaches the maximum. With the help of Shewhart control chart, the interference of gradient fluctuation on signal judgment can be eliminated, and the accurate abnormal early warning range of specimen yield can be given, so as to realize the fast and accurate identification of early damage of magnetic memory.
【作者单位】： 东北石油大学机械科学与工程学院;东北石油大学计算机与信息技术学院;
【基金】：国家自然科学基金资助(11472076,51607035) 东北石油大学校培育基金资助(PY120225) 中国博士后科学基金资助(2015M581426)
【分类号】：TG115.284
本文编号：2485213
[Abstract]:In order to perfect the qualitative and quantitative evaluation method of early damage detected by metal magnetic memory, the torsional test of Q235 steel round rod specimen was carried out. The tangential component Hx and the normal component Hy. of the magnetic memory signal on the surface of the specimen under different torque are recorded by using the stress concentration magnetic indicator. Furthermore, an early damage detection method of magnetic memory signal based on Shewhart control chart is proposed. The results show that the magnetic signal jumps obviously when the specimen yield, and the absolute value of the synthetic magnetic field gradient reaches the maximum. With the help of Shewhart control chart, the interference of gradient fluctuation on signal judgment can be eliminated, and the accurate abnormal early warning range of specimen yield can be given, so as to realize the fast and accurate identification of early damage of magnetic memory.
【作者单位】： 东北石油大学机械科学与工程学院;东北石油大学计算机与信息技术学院;
【基金】：国家自然科学基金资助(11472076,51607035) 东北石油大学校培育基金资助(PY120225) 中国博士后科学基金资助(2015M581426)
【分类号】：TG115.284
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