摘要
为了研究混凝土悬臂梁损伤位置的动力识别问题,利用ANSYS软件,建立了损伤前后的不同模型,得到了悬臂梁损伤前后的前六阶频率变化规律,提取不同位置的振动位移,通过节点位移得到振型模态。由振型模态计算其曲率模态,由曲率模态引入的"D"值曲线在损伤位置会出现"尖峰",通过"尖峰"位置可以较准确的判定损伤位置。
In order to study dynamic identification problem of concrete cantilever beam on damage locations, ANSYS software is used to build different models before and after damage, and six order frequency variation rule of before and after damage cantilever beam is obtained. Extracting vibration displacement of different locations, mode shape is obtained by joint displacement. Its curvature mode can be obtained with mode shape. ＂D＂ value curve which is imported by curvature mode appears ＂peak＂ on damage locations, and damage locations can be judged accurately by ＂peak＂.
出处
《三明学院学报》
2015年第4期77-82,共6页
Journal of Sanming University
关键词
混凝土悬臂梁
ANSYS
损伤识别
曲率模态
损伤定位
concrete cantilever beam
ANSYS
damage identification
curvature mode
damage location
