夹层板脱层对结构振动特性的影响分析

发布时间：2018-11-04 17:16

【摘要】：聚氨酯弹性体钢夹层板结构(SPS)因其优异的力学性能和可设计性,近年来在船舶制造等领域得到广泛应用。本文通过理论与数值仿真,研究了SPS夹层板结构自由振动以及脱层对振动特性的影响。首先,对SPS夹层结构,提出一种等效模型,采用简化一阶剪切变形理论,建立了夹层板横向自由振动控制方程,并结合边界条件给出了SPS夹层结构的振动频率表达式。通过与文献和数值仿真结果的对比分析,验证了本模型与方法的有效性与准确性。考虑结构易脱层的特点,研究了面/芯脱层对结构振动特性的影响,对比分析脱层范围、脱层位置以及脱层形状对结构低阶频率的影响,给出了各脱层参数与结构低阶振动频率的关系,为SPS结构的设计与应用提供指导。
[Abstract]:Polyurethane elastomer steel sandwich plate structure (SPS) has been widely used in shipbuilding and other fields in recent years because of its excellent mechanical properties and designability. In this paper, the free vibration of SPS sandwich plate and the effect of delamination on the vibration characteristics are studied by theoretical and numerical simulation. Firstly, an equivalent model is proposed for SPS sandwich structure, and the governing equation of transverse free vibration of sandwich plate is established by using the simplified first-order shear deformation theory. The vibration frequency expression of SPS sandwich structure is given in combination with boundary conditions. The validity and accuracy of the model and the method are verified by comparing with the literature and numerical simulation results. Considering the characteristics of easy delamination, the influence of surface / core delamination on the vibration characteristics of the structure is studied, and the effects of delamination range, delamination position and delamination shape on the low-order frequency of the structure are compared and analyzed. The relationship between each delamination parameter and the low order vibration frequency of the structure is given, which provides guidance for the design and application of SPS structure.
【作者单位】：江苏科技大学船舶与海洋工程学院;
【基金】：国家自然科学基金青年基金资助项目(E091002/51109101)
【分类号】：U661.44

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