Abstract

Exact analytical solutions of diffraction problems are obtained for nonstationary plane and cylindrical waves on a half-plane at following mixed boundary conditions: the Neumann condition on one side of the half-plane and the Dirichlet condition on the other one. The numerical analysis of near-front asymptotic solutions shows that there is a considerably greater attenuation of blast waves behind the half-plane (barrier) with sides of different noise absorption properties, than in the case of complete reflection from both sides of the half-plane.

中文翻译：

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非平稳平面和圆柱波的混合半平面衍射问题的解决及爆炸波的屏障防护

摘要

在以下混合边界条件下，获得了半平面上的非平稳平面波和圆柱波的衍射问题的精确解析解：在半平面的一侧为Neumann条件，在另一侧为Dirichlet条件。对近前渐近解的数值分析表明，与具有不同噪声吸收特性的侧面相比，在半平面（障碍）后面的爆炸波的衰减要大得多，而在半平面的两侧都进行全反射的情况下，爆炸波的衰减更大。飞机。