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首页> 外文会议>2014 IEEE Far East Forum on Nondestructive Evaluation/Testing: New Technology amp; Application >Phased array B-scan acoustic field simulation of aluminum extrudate FSW welds with complex shapes
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Phased array B-scan acoustic field simulation of aluminum extrudate FSW welds with complex shapes

机译：复杂形状的铝挤压FSW焊缝的相控阵B扫描声场模拟

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摘要

Because the section of aluminum alloy extrudate used in high-speed train is complex, lots of structural echoes and noise will be received when using array ultrasound to detect the flaws in friction stirring welds (FSW). Therefore, phased array acoustic field model and acoustic rays propagation model were introduced to simulate the acoustic field pressure distribution and the sound beams propagation paths. According to the simulation results, the appropriate incident angle of sound beam, depth of focus and other parameters were determined. Meanwhile the echoes in the B-scan images can be predicted and it will be helpful to predict the feature points in the B-scan images, as a result, the analysis and defect detection of the FSW welds will become convenient.
机译：由于高速列车中使用的铝合金挤出物截面复杂，因此在使用阵列超声检测搅拌摩擦焊缝（FSW）中的缺陷时会收到许多结构回波和噪音。因此，引入相控阵声场模型和声波传播模型来模拟声场压力分布和声束传播路径。根据仿真结果，确定了合适的声束入射角，聚焦深度和其他参数。同时可以预测B扫描图像中的回波，有助于预测B扫描图像中的特征点，因此，FSW焊缝的分析和缺陷检测将变得很方便。

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