摘要
提出了一种基于结构振动特性的损伤指标定位方法,对一空间复杂模型结构进行模拟损伤定位分析,考虑了2种损伤状态7种损伤模式,采用环境激励方式,利用有限的测试信息对不同的损伤模式进行分析,结果表明,将损伤指标同结构自身特性、识别的模态参数结合起来综合考虑,能够对空间复杂结构可能损伤的位置给出合理的估计.
A vibration-based damage index localization method was proposed,and damage localization analysis of a complicated spatial model structure was conducted.The 7 known damaged cases including two kinds of damage states,brace damage cases and joint damage cases,were considered,and the different damage patterns were ana-lyzed according to the limited number of measurements from ambient excitations.Results indicate that reasonable estimation for the possible damage location of the complicated spatial structure can be derived by combining the dam-age index with the characteristics of the analytical model and the identified modal characteristics.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2011年第7期577-581,共5页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金重大研究计划重点支持项目(90815025
90715032)
国家自然科学基金青年科学基金资助项目(50808013)
关键词
空间复杂结构
损伤指标
损伤定位
环境激励
spatial complicated structure
damage index
damage localization
ambient excitation