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中文摘要：
为研究新型大跨度钢筋混凝土蜂窝形空腹夹层板楼盖的动力特性,基于通用有限元软件ANSYS,采用子空间迭代法计算结构的基频和各阶振型,考察高跨比、空腹率、上肋和下肋宽度、密肋宽度与高度、表层板厚度、密柱截面边长和边梁宽度等参数对结构基频的影响。分析结果表明,空腹夹层板的振型特征与实心平板结构的振型相似,低阶振型主要表现为楼盖的竖向振动,但空腹夹层板质量轻,刚度分布均匀,受力合理。影响结构基频的主要因素为高跨比、空腹率和密柱截面边长以及上肋和下肋宽度;密肋尺寸、表层板厚度和边梁宽度对空腹夹层板的基频影响较小。为了满足对结构振动舒适度的要求,在工程设计时应将高跨比、空腹率和密柱截面边长作为主要指标进行控制。
英文摘要：
In order to study the dynamic characteristics of long span honeycomb sandwich plate,the finite element software ANSYS was used to calculate the fundamental frequency and vibration mode of the structure. The effects of high span ratio,hollow ratio,width of upper and lower rib,width and height of dense rib,thickness of surface layer,cross section length of dense column and width of side beam on the structural fundamental frequency were considered. The results of the study suggest that the vibration modes of the honeycomb sandwich plate are similar to those of the solid plate,and the low-order modes mainly reflect the vertical vibration of the plate. The lighter the weight of the sandwich plate is,the more uniform the stiffness distribution and the more reasonable the stress distribution will be. The main factors that affect the fundamental frequency of the honeycomb sandwich plate are the high span ratio,the hollow ratio,the cross section length of the column and the widthof upper and lower rib. The size of the dense rib,the thickness of the surface layer and the width of the side beam has less effect on the fundamental frequency of the sandwich plate. In engineering design,the high span ratio,the hollow ratio and the stiffness of the column are the main factors to be controlled to meet structural comfort requirements under vibration.
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