本文应用一致性时域有限差分法（FDTD）和近场远场变换计算散射声目标的反射声压强度，找出反射声压级与目标声中心到换能器间距离的关系。
Using the finite difference time-domain (FDTD) method and near field to far field transformation, pressure of the reflected sound from the scattering target is calculated.
阐述了横波在端角反射中的理论方法计算，并推导端角及端角形缺陷的回波声压理论计算公式。
This paper introduces the theory calculation of shear wave reflection for block corner. And it derives the echo acoustic pressure theory calculation formula for block corner and its shape defect.
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