摘要
将竖向混合结构等效成两自由度结构模型,对该两自由度模型进行不同子结构参数取值下的近似解耦计算,分析其模态阻尼矩阵对角占优程度和近似解耦计算结构响应误差情况。研究结果表明:在不同子结构特性下,模态阻尼矩阵对角占优指数和位移误差指数的衰退特征具有相似性。因此在竖向混合结构动力分析时,可以采用对角占优指数来判定采用近似解耦计算的可行性。
Through equivalent two degree-of-freedom（2-DOF） models with different sub-structural dynamic properties, the quantifications of diagonal dominance and decoupling errors were calculated to verify the degree of approximation and feasibility of this method. The results show that with different sub-structural dynamic properties, the distribution of diagonal dominance and displacement errors of the models are similar. Therefore, the diagonally dominant index can be adopted to analyze the feasibility of decoupling approximation method in calculation of dynamic response of vertical mixed structure.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第4期1454-1460,共7页
Journal of Central South University:Science and Technology
基金
国家"十二五"科技支撑计划项目(2012BAJ13B02)
国家自然科学基金资助项目(91315301-4)~~
关键词
竖向混合结构
非比例阻尼矩阵
模态阻尼矩阵
对角占优
解耦误差
vertically mixed structure
non-proportional damping matrix
modal damping matrix
diagonal dominance
decoupling errors
