摘要
在标准材料制备工艺条件下,可用材料的密度表征材料的微结构构型。基于该思想,以不同的阻尼层材料密度代表不同的阻尼层材料微结构,针对阻尼层的两种优化构型和优化前的构型,从材料和结构两个尺度层面,实验研究了实际工程中的一种圆形阻尼层合结构的阻尼比随阻尼层材料密度与阻尼层构型的变化。测试得到了给定阻尼层构型时,不同激励幅值和负载质量加载下,结构阻尼比随阻尼材料密度的变化曲线,以及给定阻尼层材料密度时,含有三种不同构型阻尼层的结构的阻尼比随载荷激励幅值的变化曲线。两尺度的实验结果表明:适当的材料设计和结构拓扑优化可以提高圆形阻尼层合结构的阻尼特性;同时也表明:满足工程要求的拓扑优化构型存在多个。
The micro configuration of porous material can be represented by its density under standard manufacturing engineering.Based on this idea and using different densities to represent different micro configurations of the damping material,experiment studies on circular laminated damping structures are implemented and the influences of structure topology and material density on structural damping ratios are measured.The curves of the damping ratio of the structure with given optimized configuration versus different densities and load cases and that of the structure with a given density versus an optimization form and load cases are measured.The two-scale experimental results indicate that the suitable structure optimization and material design can improve the damping characteristics of circular laminated damping structures.At the same time,the research indicates that multiple local optimization forms of the damping layer come into being to satisfy the engineering specification.
出处
《工程力学》
EI
CSCD
北大核心
2013年第4期350-354,共5页
Engineering Mechanics
基金
中国工程物理研究院科学技术发展基金项目(2008A0302011)
关键词
圆形阻尼层合结构
结构优化
材料设计变量
结构阻尼比
两尺度实验研究
circular laminated damping structures
structure optimization
material design variables
structural damping ratio
two-scale experimental research
