Thompson Ian
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 7ZL, UK.
Proc Math Phys Eng Sci. 2020 Nov;476(2243):20200648. doi: 10.1098/rspa.2020.0648. Epub 2020 Nov 25.
We consider a plane flexural wave incident on a semi-infinite rigid strip in a Mindlin plate. The boundary conditions on the strip lead to three Wiener-Hopf equations, one of which decouples, leaving a scalar problem and a 2 × 2 matrix problem. The latter is solved using a simple method based on quadrature. The far-field diffraction coefficient is calculated and some numerical results are presented. We also show how the results reduce to the simpler Kirchhoff model in the low-frequency limit.
我们考虑一个平面弯曲波入射到Mindlin板中的半无限刚性条带上。条带上的边界条件导致三个维纳 - 霍夫方程,其中一个方程解耦,从而留下一个标量问题和一个2×2矩阵问题。后者通过基于求积的简单方法求解。计算了远场衍射系数并给出了一些数值结果。我们还展示了在低频极限下结果如何简化为更简单的基尔霍夫模型。