摘要
提出了结构单元模态应变能的概念，并导出了基于单元模态应变能变化率的结构破损位置的诊断方法。该方法仅以结构破损前后的模态振型和单元刚度矩阵为输入信息。算例的数值结果表明，该方法简便、有效。
A method based on elemental modal strain energy change is presented for locating the damage in a structure. The information required in the damage location is measured mode shapes and elemental stiffness matrix,so that the knowledge of the complete stiffness and mass matrices of the structure is not required.The experimental results illustrate that the method is effective and robust in locating structural damage.
出处
《振动工程学报》
EI
CSCD
1998年第3期356-360,共5页
Journal of Vibration Engineering
基金
航空基金
关键词
结构振动
模态分析
故障诊断
模态应变能
破损
structural vibration
modal analysis
damage detection
modal strain energy
