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首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Three-Dimensional Finite Element Analyses on Vibration of Piezocomposite Laminated Plates with a Coin-Shaped Damage
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Three-Dimensional Finite Element Analyses on Vibration of Piezocomposite Laminated Plates with a Coin-Shaped Damage

机译：硬币形损伤的压电复合材料层合板振动的三维有限元分析

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摘要

Due to their inherent coupled elecomechanical behavior, the piezocomposite-laminated plates (PLP) have been extensively used in the smart structures and devices such as transducers, sensors and actuators. Some piezocomposite-laminated plates may sustain higher electric loads without breakdown, but are most likely to delaminate on the interface between layers and then form coin-shape damage (CSD) or crack. Without doubt, the interface CSD in the PLP will degrade the electric performance and affect their vibration characteristic. Health monitoring of some special smart structures designed to carry higher mechanical load is crying out for a better understanding to the effects of damages on the vibration characters of the PLP. In the present paper, detailed three-dimension transient state finite element analyses on the PLP containing an interface CSD have been performed to study vibration characteristic of PLP. The emphases are mainly fastened on the influences of CSD on the mode and frequency responses of the PLP. By comparison with the vibration behavior of corresponding perfect PLP, significant effects of the interface CSD on the vibration frequency and mode of PLP are revealed. These interesting results may afford powerful theoretic support for the health monitoring of smart structures.
机译：由于其固有的耦合机电行为，压电复合材料层压板（PLP）已广泛用于智能结构和设备，例如传感器，传感器和执行器。某些压电复合材料层压板可承受较高的电负载而不会击穿，但最有可能在层之间的界面上分层，然后形成硬币状损坏（CSD）或破裂。毫无疑问，PLP中的接口CSD将降低电性能并影响其振动特性。为了更好地了解损坏对PLP振动特性的影响，一些旨在承载更高机械负载的特殊智能结构的健康监控正在呼吁进行。在本文中，对包含界面CSD的PLP进行了详细的三维瞬态有限元分析，以研究PLP的振动特性。重点主要放在CSD对PLP的模式和频率响应的影响上。通过与相应的完美PLP的振动行为进行比较，揭示了界面CSD对PLP振动频率和模式的显着影响。这些有趣的结果可能为智能结构的健康监控提供有力的理论支持。

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