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针对超声波圆盘声源理想声场图像与实际声场差距较大,无法应用于实际的情况,对探伤中圆盘活塞声源进行研究,考虑实际声场辐射脉冲波,介质为固体等因素,改进理想声场声压公式,并利用数值模拟软件MATLAB运用数值解法解得圆盘声源实际超声场声压关于声场位置函数,并分别绘制固体与流体中脉冲声压-距声源距离-偏离轴线距离的三维图像。特别考察近场区声压波动情况,为近场区探伤定量提供依据。
Because of the large difference between the ideal sound field and the actual sound field, the sound source of the disc piston can not be applied to the actual situation. The sound source of the disc piston is studied. Considering the actual sound field radiation pulse wave and the solid medium, the ideal sound field Sound pressure formula and using numerical simulation software MATLAB numerical solution of disc sound source ultrasonic field sound pressure on the sound field position function, and were plotted in solid and fluid pulse sound pressure - from the sound source - off-axis distance of the three-dimensional image. In particular, investigate the fluctuation of sound pressure in the near field and provide the basis for the quantitative determination of the near field.