Scattering of obliquely incident waves by straight features in a plate

作者：Feng, Feilong^*; Shen, Zhuangzhi; Shen, Jianzhong

来源：Wave Motion, 2016, 60: 84-94.

DOI：10.1016/j.wavemoti.2015.09.005

• Mode decomposition
• Oblique incidence
• Straight features
• Real orthogonal relation
• Hermitian matrix

The scattering of obliquely incident waves by straight features in a plate is solved analytically. The reflection matrix of a free straight edge and the scattering matrix of a straight thickness step are obtained respectively by modal decomposition based on a real orthogonal relation. The formulas are illustrated through numerical examples. The matrices are found to be Hermitian for the propagating modes; thus, the mode conversions are reciprocal in terms of energy. The matrices can be used to determine the scattering from more complicated straight features if the cross sections are approximated as sequences of stairs and steps.

• 出版日期2016-1
• 单位陕西师范大学; 西安工程大学; 中国科学院声学研究所