方舱单元夹层板阻尼特性研究  

RESEARCH ON DAMPING CHARACTERISTICS OF SANDWICH PLATES AS MAIN ELEMENTS OF RECTANGULAR VAN

作　　者：臧建华[1] 方蕴文 陈国寿 

机构地区：[1]电子科技大学电子机械系,成都610054

出　　处：《电子科技大学学报》1992年第4期399-404,共6页Journal of University of Electronic Science and Technology of China

摘　　要：采用实验模态分析导纳圆法求取夹层板的模态频率和阻尼。夹层板芯层材料为聚氨酯硬质泡沫,上下表板材料为硬铝和玻璃钢两类,其尺寸和支承条件基本上与实际方舱结构相似。所获的结果可直接用于大板方舱单元件动力设计。对其本征解用有限元法作了分析计算,实验与理论计算结果基本吻合。With the theory of modal analysis, this paper prsents an experimental method to evaluate the modal characteristics, mainly modal frequency and modal damping of rectangular sandwich plates, using Nyquist plots of the frequency response readings. These plates are made of thick sheet polyurethane hard foam, with thin sheet of alloy aluminium or glass-fibre reinforced plastics attached to each face. The sizes and support conditions of the specimens are designed to bo comparable with that of practical radar van panels, so the results gained may be directly used in dynamic design of panels of sandwich radar van. A finit element analysis is here carried out for the eigen solution of the plates, the results are well agreed with experiments.

关 键 词：位移导纳 模态频率 结构阻尼 

分 类 号：TB33[一般工业技术—材料科学与工程]