摘要
针对用模态叠加法计算结构线性振动系统的响应 ,作模态截断的截尾模态阶数的取值 ,给出了能量范数形式的判断指标 .用于小湾拱坝结构的动力分析表明 ,需取 10阶以上的模态进行叠加 .
By using the modal superposition method for the dynamic responses calculation of the linear oscillation system, a judging indictor in the energy norm form is given to determine the number of dominant modes on mode truncation. According to this judging indictor, 10 or more dominant modes are needed in the calculation of modal superposition for the Xiaowan Arch Dam.
出处
《水利水运工程学报》
CSCD
北大核心
2002年第1期52-55,共4页
Hydro-Science and Engineering
关键词
线性振动系统
模态叠加法
模态截断
能量范数
拱坝
linear oscillation system
modal superposition method
mode truncation
energy norm
arch dam$$$$
