铁道科学与工程学报2018，Vol.15Issue(2)：483-488,6.
基于熵值法的目标模态最优数目确定新方法
Entropy-based approach for determining the optimal number of target modes
摘要
Abstract
In order to simplify the calculation process of complex structural model analysis and distinguish the mode number of the complex structure when it changes between the global and local vibrations, an entropy-based approach for determining the optimal number of target modes was proposed. The target modes were analyzed and the information about their vibration modes was generated. The Fisher information matrix was calculated based on the calculated vibration modes. The entropy in various stages was computed according to the Fisher in formation matrix, and the sudden change characteristic function of the entropy was computed to determine the sudden change point. The change of the quantity of Fisher in formation matrix was represented by the change of entropy, and then the mode numbers of global and local vibrations can be calculated. Simulation results of CRH3 bogie frame show that this new approach could determine the number of the global vibration on the frame precisely.关键词
模态分析/熵值法/Fisher信息矩阵/突变特征函数/模态数目/转向架构架Key words
modal analysis/entropy method/Fisher information matrix/sudden change characteristic function/mode number/bogie frame分类
机械制造引用本文复制引用
张楠,彭珍瑞,殷红,董海棠,董小圆..基于熵值法的目标模态最优数目确定新方法[J].铁道科学与工程学报,2018,15(2):483-488,6.基金项目
国家自然科学基金资助项目(61463028)；甘肃省自然科学基金资助项目(1506RJZA069) （61463028）
