基于损伤因子的板架结构损伤识别方法研究  

Damage detection for plate-like structure based on damage index

作　　者：徐峰[1] 彭海阔[1] 孟光[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《振动与冲击》2010年第12期22-25,共4页Journal of Vibration and Shock

摘　　要：用基于损伤因子的损伤识别方法对板架结构损伤进行识别。先将板架结构简化为多个板的组合;基于损伤前后模态振型从应变能角度推导损伤因子的表达式,用通用有限元软件ANSYS计算两种损伤工况下损伤前后的模态振型,再用B样条法拟合损伤因子曲面从而对损伤的位置进行识别。最后用实验验证了该方法。该方法对于识别板架结构的单个损伤具有较好的可靠性,并可以为识别多损伤位置提供较好的方法指导。A method of damage detection for plate structure based on damage index was introduced.The structure was first simplified into the combination of multi plates.From the point of view of strain energy,the expression of damage index,related to modal shapes was deduced then the modal shapes before and after damage at two different circumstances were calculated and the curved surface of damage index was obtained.The method was verified by experiments,and is useful to detect the single damage location of plate structure,and to referee the multi damages detection results.

关 键 词：损伤识别 板架结构 模态振型 损伤因子 

分 类 号：TU319[建筑科学—结构工程]