Numerical simulation of the Lamb wave propagation in honeycomb sandwich panels: A parametric study
Numerical simulation of the Lamb wave propagation in honeycomb sandwich panels: A parametric study
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DOI：
10.1016/j.compstruct.2012.09.055
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发表时间：
2013-03-01
影响因子：
6.3
通讯作者：
Gabbert, Ulrich
中科院分区：
文献类型：
--
作者：
Hosseini, Seyed Mohammad Hossein;Gabbert, Ulrich
研究了兰姆波在蜂窝夹层板中的传播特性。兰姆波是现代结构健康在线监测技术中的一种常用方法。要用解析解来分析波在如此复杂的几何结构中的传播几乎是不可能的，因此使用了三维有限元模拟。压电致动器用于在夹层板表面上激发波。蜂窝夹芯板的扩展模型由两个板层和一个中间芯层组成。此外，为了降低计算成本，采用了一种简化的模型，其中夹层板的中间芯体被均匀层代替。在大多数情况下，扩展模型和简化模型的结果是在一个很好的协议，但使用简化模型的局限性进行了讨论。通过参数化研究，揭示了蜂窝板的几何特性、蒙皮板的材料特性和加载频率对群速度、波长和能量传输的影响。这些属性中的每一个都为设计有效的健康监视系统提供了有价值的信息。最后，给出了一个实验测试。(C)2012爱思唯尔有限公司保留所有权利。
The paper aims to describe the guided Lamb wave propagation in honeycomb sandwich panels. The application of Lamb waves is a well-known method in modern online structural health monitoring techniques. To analyze the wave propagation in such a complicated geometry with an analytical solution is hardly possible; therefore a dimensional finite element simulation is used. A piezoelectric actuator is used to excite the waves on the sandwich panel surface. The extended model of the honeycomb sandwich panel is consisting of two plate layers and a mid-core layer. In addition, a simplified model is used to reduce the computing costs, where the mid-core of the sandwich panel is replaced by a homogeneous layer. The results from the extended model and the simplified model are in most cases in a good agreement; however the limitations of using the simplified model are discussed. A parametric study is used to show the influence of the geometrical properties of honeycomb plates, the material properties of the skin plates and the loading frequency on the group velocity, the wave length and the energy transmission. Each of these properties provides valuable information to design an efficient health monitoring system. Finally, an experimental test is presented. (C) 2012 Elsevier Ltd. All rights reserved.