A Review on Vibration Damping in Sandwich Composite Structures
A Review on Vibration Damping in Sandwich Composite Structures
复制标题
夹层复合结构减振研究进展
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Crocker
中科院分区：
文献类型：
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作者：
Zhuang Li;M. Crocker
夹层结构由三个部分组成：面板、芯层和粘合界面层。夹层结构的最大优点是，通过选择不同的材料和面板和芯部的几何构型，可以针对不同的应用获得最佳设计。通过在两个面板之间插入轻质芯，与单层均质结构相比，弯曲刚度和强度显著增加，而不增加太多重量。粘弹性芯具有高的固有阻尼能力。当梁或板发生弯曲振动时，阻尼核心受到剪切约束。这种剪切导致弯曲运动被阻尼并且振动能量被耗散。此外，芯和面板之间的垂直剪切耦合减少了声音传输。因此，近年来，这种结构越来越多地用于运输车辆和其他应用。Rao描述了粘弹性阻尼在汽车和飞机结构中的应用。除了在结构中使用阻尼处理外，夹层玻璃还用于汽车侧窗和后窗以降低噪音。复合材料也用于管道和导管。Nakra发表了一系列关于粘弹性材料振动控制的评论。Trovik总结了直到1980年约束层阻尼处理的主要用途。Chandra等人对纤维增强复合材料阻尼的研究工作进行了全面的回顾，一些经典的书籍和章节对粘弹性阻尼和夹层结构进行了详细的介绍。2.分析理论
A sandwich structure consists of three elements: the face sheets, the core, and the adhesive interface layers. The great advantage of sandwich structures is that optimal designs can be obtained for different applications by choosing different materials and geometric configurations of the face sheets and cores. By inserting a lightweight core between the two face sheets, the bending stiffness and strength are substantially increased compared to a single layer homogenous structure, without the addition of much weight. The viscoelastic core has a high inherent damping capacity. When the beam or plate undergoes flexural vibration, the damped core is constrained to shear. This shearing causes the flexural motion to be damped and the vibrational energy to be dissipated. Additionally, the normal-to-shear coupling between the core and face sheets reduces the sound transmission. So in recent years, such structures have become used increasingly in transportation vehicles and other applications. Rao has described the applications of viscoelastic damping in automotive and aircraft structures. Besides damping treatments used in structures, sandwich glass has been used in automotive side and rear windows to reduce noise. Composite materials are also used in pipes and ducts. Nakra has published a series of reviews on vibration control with viscoelastic materials. Trovik has summarised the major uses of constrained layer damping treatments up to 1980. A thorough review of work in fibre-reinforced composite material damping research has been given by Chandra et al. Some classical books and book chapters give more details on viscoelastic damping and sandwich structures. 2. ANALYTICAL THEORIES