摘要
损伤会引起结构参数的变化,由此将可能导致损伤前后模态不再按相同阶数一一对应。通过理论推导与分析,得出损伤前后模态可能会跃迁的结论。基于相关原理,通过计算损伤前与损伤后模态的相关系数,可以判定跃迁后模态的对应关系。数值仿真实验表明该方法具有较高的精度。
The changes of structural parameters with damage are likely to cause the structural modes after damage not in the same order as those corresponding ones before damage. Through theoretical deduction and analysis, a conclusion of possible mode jumping is drawn. Based on the principle of relativity, the correspondence of the structural modes before damage and after damage can be determined by calculating the mode correlation coefficient. Numerical experiments show that this method is of higher precision.
出处
《工程力学》
EI
CSCD
北大核心
2006年第6期35-40,76,共7页
Engineering Mechanics
基金
国家自然科学基金项目(50478075)
江苏省自然科学基金项目(BK2003061)
关键词
结构工程
损伤识别
矩阵摄动
局部刚度
模态跃迁
模态相关系数
structural engineering
damage identification
matrix perturbation
partial stiffness
mode jumping
mode correlation coefficient
