一般约束边界下波纹夹芯板结构的自由振动分析

Free vibration analysis of corrugated sandwich panel structure undergeneral constrained boundary

波纹夹芯板作为轨道交通车辆车体结构的常用单元,其动力学特性对于指导车体的动力学设计具有重要意义。现有研究对于波纹夹芯板的振动特性研究大多基于经典边界下展开,但考虑到工程实际的复杂性,采用弹性约束来表征该类板件往往更贴近实际工况。文章以一般约束边界下波纹夹芯板为研究对象,基于夹芯板等效原则,应用能量法建立了一般约束边界下波纹夹芯板的动力学模型。将模型计算所得的结果和文献结果进行对比,验证了该方法的准确性。在此基础上,通过数值算例分析了结构参数对于波纹夹芯板动力学特性的影响规律,为波纹夹芯板的动态化设计及优化提供理论参考依据。

As a common component in the body structure of rail transit vehicles,the corrugated sandwich panel is of great significance to guide the dynamic design of vehicle body due to its dynamic characteristics.Existing research on the vibration characteristics of corrugated sandwich panels is mostly based on classical boundaries.However,in view of the complexity of engineering practice,using elastic constraints to characterize such panels is often more closely related to actual working conditions.This paper takes corrugated sandwich panels under general constraint boundaries as the research object,and based on the principle of sandwich panel equivalence,an energy method is applied to establish a dynamic model of corrugated sandwich panels under general constraint boundaries.The accuracy of this method is verified by comparing the results calculated by the model with the literature presentations.On this basis,the influence of structural parameters on the dynamic characteristics of corrugated sandwich panels is analyzed through numerical examples,which in turn can be used as a theoretical reference for the dynamic design and optimization of corrugated sandwich panels.