摘要
将结构固有动力特性和外部环境激励(确定性荷载及环境随机因素)联系在一起,运用实验模态分析技术和结构强度理论,分离出实际工作环境下结构的主导模态及其模态参与因子,从而将一静动耦合力作用下的空间复杂应力状态问题转化为各阶模态相互作用下的简单应力状态(模态形态下)问题进行结构动强度分析,对损伤结构在各阶模态对应动应力和静载相互作用下的破坏形式及其规律做合理的解释.通过带损伤的简支梁模型进行数值模拟计算及破坏试验以研究结构破坏的规律等问题.
Structural inherent character and exterior excitation （confirm loads and conditional random factors） are combined to separate dominant modes and its modal participating factor from practical work state by means of experimental modal analysis technique and structure intension theory. Structural dynamic intension are analysed by translating space complex stress state in process of still and dynamic coupling force into simple stress state in reciprocity of each rank mode. Finally, the simple support beam is taken as model to carry out numerical simulation calculation and damage experiment.
出处
《武汉理工大学学报（交通科学与工程版）》
2007年第6期991-994,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
模态分析
主导模态
动强度
静动应力耦合
modal analysis
dominant mode
dynamic intension
coupling still with dynamic stress
