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钢包耳轴焊缝缺陷是影响钢包安全运行的重大危险源,常规检测手段无法探测耳轴根部的疲劳裂纹。利用声发射平面定位技术对钢包耳轴焊缝进行检测,对检测数据进行滤波,以确定目标信号。利用希尔伯特-黄变换对目标信号进行EMD分解,对分解后的8个本征模态函数进行傅里叶变换,以确定其频率范围。结果表明,声发射技术对形状复杂的大型设备的结构完整性检测有独特优势。
The defect of the weld of the ladle trunnion is a major hazard source that affects the safe operation of the ladle. The conventional detection method can not detect the fatigue crack of the trunnion root. The use of acoustic emission plane positioning technology to detect the weld of the ladle trunnion, the detection data filtering to determine the target signal. The Hilbert-Huang transform is used to perform EMD decomposition on the target signal, and the decomposed 8 intrinsic mode functions are Fourier transformed to determine their frequency range. The results show that acoustic emission technology has unique advantages for structural integrity testing of complex equipment with complex shapes.