Institute for Mathematics, Mechanics and Informatics, Kuban State University, Krasnodar 350040, Russia.
J Acoust Soc Am. 2012 Aug;132(2):EL119-24. doi: 10.1121/1.4734392.
Lamb wave propagation in fiber-reinforced composite plates is featured by a pronounced directivity of wave energy transfer along the fibers from a point surface source. In the case of non-point (sized) source, the main lobe of radiation diagram may turn with frequency up to the orthogonal to the fibers direction. This effect has been theoretically studied and physically explained in the context of semi-analytical integral-equation based mathematical model. The present paper gives its experimental verification.
纤维增强复合材料板中的兰姆波传播具有明显的方向性，即波能量从点源沿着纤维方向传递。在非点（尺寸）源的情况下，辐射图的主瓣可能随频率旋转，直到与纤维方向正交。这一效应已经在基于半解析积分方程的数学模型的理论研究和物理解释中得到了研究。本文对其进行了实验验证。
