复合材料瞬变电磁检测的模拟试验

Simulation and Experiment on Transient Electromagnetic Testing of Composites

建立了小尺度浅层瞬变电磁法检测碳纤维复合材料的计算模型。沿测线将计算模型进行简化,通过Hankel变换求取测点的瞬变电磁响应,组合所有测点的数据获得复合材料的瞬变电磁响应。结果表明:异常与试块缺陷有很好的对应关系,计算精度随测点间距的减小而增加。通过与检测试验数据的对比,分析和验证了计算模型的适用性和精度。

An computation model is developed that small yardstick and shallow transient electromagnetic method（TEM） is put forward to detect composites. The model is simplified along a measuring line, and transient electromagnetic response of every measuring point is obtained through Hankel transformation, then all data are converted into a profile of composites. The result shows that the comparison between anomaly and specimen flaws shows an excellent agreement, and computational precision improves along with the reduction of the space between measuring points. Finally, the computation model is verified by experiments.