排序方式: 共有5条查询结果,搜索用时 15 毫秒
1
1.
2.
3.
Simulation of phased array S-scan acoustic field in FSW joint of aluminum alloy extrudate with complex shape 下载免费PDF全文
The shape of aluminum alloy extrudate used in high-speed train is complex, structural noises from the surfaces of the extrudate will be received when using ultrasonic phased array to detect the flaws in FSW. To solve this problem, ultrasonic phased array acoustic field model and propagation simulation of acoustic waves were introduced to simulate the acoustic pressure distribution and the propagation of the acoustic waves. With the methods above, the detection parameters can be optimized and as a result, the experimental process can be simplified and the detection efficiency can be improved. Mean while, the echoes in the S-scan images can be predicted, which can help analyze the detection results and judge the defects. 相似文献
4.
5.
一种铝合金薄板搅拌摩擦焊焊缝的超声快速检测方法 总被引:6,自引:1,他引:6
搅拌摩擦焊(Friction stir welding,FSW)薄板检测历来是一个难点,现在应用于薄板焊缝检测的方法多采用横波入射法及超声相控阵扇形扫查等,但这些方法都难以实现长直焊缝的快速检测与缺陷成像。采用超声相控阵C扫描直接从焊缝表面对焊缝内部缺陷进行C扫描,研究该技术对不同厚度薄板隧道型及未熔合缺陷的探测能力,开发一套用于快速相控阵检测的机械装置,并分析FSW焊缝表面对C扫描成像的影响。试验结果证明,采用超声相控阵技术对5 mm以上厚度板中0.3mm以上的侧孔及0.5 mm的平底孔具有良好的检测效果。 相似文献
1