In this work, a numerical analysis of the dynamic frequency responses of sandwich plates with micro-lattice core is presented. The finite element analysis is implemented in the commercial software Abaqus/Standard, calculating the natural frequencies and eigenmodes of sandwich plates containing defects on the micro-lattice structure. In order to include the presence of defects, an aleatory algorithm is developed in MATLAB. The effect of the damage percentage, cell type, cell size and material on the frequency and modal responses of the sandwich plates is highlighted. Results show that the dynamic frequency response may be useful for analysing practical issues related to non-destructive damage identification of imperfections in the micro-lattice core of sandwich structures.

中文翻译：

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损伤微晶格芯夹层板动态频率响应的数值分析

在这项工作中，对具有微晶格芯的夹层板的动态频率响应进行了数值分析。有限元分析在商业软件 Abaqus/Standard 中实现，计算包含微晶格结构缺陷的夹层板的固有频率和特征模态。为了包括缺陷的存在，在 MATLAB 中开发了一种随机算法。突出显示了损坏百分比、单元类型、单元大小和材料对夹层板的频率和模态响应的影响。结果表明，动态频率响应可用于分析与夹层结构微晶格核心缺陷的非破坏性损伤识别相关的实际问题。