摘要
通过利用复模态分析法定义巨子型结构体系MSCSS(Mega-sub Controlled Structure System)的动力放大系数DMF(Dynamic Magnification Factor)表达式,取激励接近结构基频频段内的动力放大系数为指标,反映了结构各部分参数设置(质量比、刚度比、附加阻尼比及附加柱刚度比)对结构调频减震机理的影响。并采用最大最小化准则选取结构的最优参数范围,该分析法适用于分析不同巨层MSCSS的参数设置。
Sections 1 and 2 of the full paper explain our application, Their core consists of： （1） Based on the complex modal theory,the expression of the dynamic magnification factor（DMF）about the mega-sub controlled structural system（MSCSS） was derived. We used the dynamic magnification factor（DMF）as structure dynamic response index. （2） According to the change of the DMF in the range of excitation frequency which was close to the structural natural frequency of vibration, it was concluded that different parameter settings （mass ratio, stiffness ratio, additional damping ratio, additional pillar stiffness ratio） about mega structure and sub structure had different influence on the control effectiveness of the MSC- SS. The results,Fig. 3 to Fig. 11, and the analysis preliminarily indicate that the optimal parameter settings can indeed improve significantly the self-absorption of shock of MSCSS. This method is applicable to analysis parameter settings of MSCSS with different number of layers.
出处
《计算力学学报》
CAS
CSCD
北大核心
2014年第5期565-570,共6页
Chinese Journal of Computational Mechanics
基金
教育部博士点基金(20096102110018)
国家自然科学基金(51078311)资助项目
关键词
巨子型结构体系
复模态分析法
动力放大系数
最优参数
mega-sub controlled structural system （MSCSS）
complex modal theory
dynamic magnification factor（DMF）
optimal parameter settings
