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首页> 外文会议>Annual Symposium on Quantitative Nondestructive Evaluation; 19980719-24; Snowbird,UT(US) >EXPERIMENTAL VALIDATION OF THE BOUNDARY INTEGRAL EQUATION MODELING FOR ARBITRARY FLAW GEOMETRIES IN ECI NDE
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EXPERIMENTAL VALIDATION OF THE BOUNDARY INTEGRAL EQUATION MODELING FOR ARBITRARY FLAW GEOMETRIES IN ECI NDE

机译：ECI NDE中任意跳变几何的边界积分方程建模的实验验证

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摘要

An experimental validation has been done, using fluxgate and SQUID sensors, on a measurement model simulating the magnetic field obtained by scanning a magnetometer over a flawed plate carrying a dc current. The measurement model uses a boundary integral equation formulation allowing arbitrary plate and flaw shapes to be modeled, thus providing a flexibility not given by analytical solutions, which are limited to only a few simple geometries. The use of 1-D boundary elements gives the model a significant computational advantage over finite element methods. The first test sample consisted of a 1 m x 1 m x 1.1 mm aluminum plate with a 1 cm x 2 cm rectangular hole, carrying a 10 A dc current. A fluxgate sensor was used for the magnetic field measurements, and the error between the peak-to-peak values of the experimental and simulated values was 6%. The second test sample consisted of a 30 cm x 30 cm x 1.1 mm aluminum plate with a 1 cm x 1 mm rectangular slot, carrying a 100 mA dc current, and the measurements were taken using a SQUID sensor, The normalized centerline profiles of the experimental and simulated values were compared, The results of the validation, comparing field amplitude and shape, show very good agreement between simulation and experiment.
机译：使用磁通门和SQUID传感器，在测量模型上进行了实验验证，该模型模拟了通过在承载直流电流的有缺陷的板上扫描磁力计而获得的磁场。测量模型使用边界积分方程式表示，可以对任意板和缺陷形状进行建模，从而提供了分析解决方案所不能提供的灵活性，分析解决方案仅限于少数几个简单的几何形状。一维边界元素的使用为模型提供了优于有限元方法的显着计算优势。第一个测试样品由一个1 m x 1 m x 1.1 mm的铝板组成，该铝板带有一个1 cm x 2 cm的矩形孔，可承载10 A直流电流。使用磁通门传感器进行磁场测量，实验值和模拟值的峰峰值之间的误差为6％。第二个测试样品由一个30 cm x 30 cm x 1.1 mm的铝板和一个1 cm x 1 mm的矩形槽组成，并带有100 mA的直流电流，并使用SQUID传感器进行测量。比较了实验值和仿真值，验证结果，场振幅和形状的比较，表明仿真和实验之间有很好的一致性。

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