基于有限元研究传感器位置对矩张量反演方法精度影响

Influence of sensor location on the accuracy of moment tensor inversion method based on finite element

矩张量反演法是结构健康安全监测的一种重要方法,由于其对结构不产生破坏、无电磁信号、监测设备要求低等特性,是一种良好的适用于飞机结构的安全监测方法。结合矩张量反演理论与有限元方法,利用外部传感器获取波动信号,分析信号获得裂纹开裂信息,给出一种可以有效判断复杂模型中最优传感器布置位置和反演结果精度的方法,并给出了不同情况下传感器的最优位置。

Moment tensor inversion is an important method for structural health and safety monitoring.Because it does not damage the structure,emits no electromagnetic signals,and requires low monitoring equipment,it is a good safety monitoring method suitable for aircraft structures.Through combining the theory of moment tensor inversion and the finite element method,using external sensors to obtain the fluctuating signals,and analyzing the signals to obtain the cracking information,a method that can effectively determine the optimal sensorlocation and the accuracy of the inversion results in a complex model is developed,and the optimal sensor locationunder different conditions is given.