板结构裂纹损伤诊断研究  

Study on Fracture Damage Detection of Plate Sturcture

作　　者：徐雅啸[1] 张吉萍[1] 

机构地区：[1]浙江海洋学院船舶与建筑工程学院,浙江舟山316000

出　　处：《浙江海洋学院学报（自然科学版）》2011年第1期66-70,共5页Journal of Zhejiang Ocean University(Natural Science Edition)

基　　金：浙江海洋学院博士科研启动经费;浙江省高校优秀青年教师基金

摘　　要：分析了板结构的裂纹损伤动力特性并研制了损伤诊断方法。首先以四边固支板结构为例进行裂纹损伤的动力特性分析,进而比较了裂纹损伤与局部损伤之间的联系与区别,以此为基础提出了裂纹损伤诊断的方法,并以一阶振型变化率为损伤标识量提出了裂纹损伤诊断步骤。最后应用提出的损伤诊断方法对含裂纹损伤的周边固支圆板结构进行了损伤诊断,结果显示该方法是有效的。Influence of fracture damage to dynamic characteristic of plate structure is analyzed and the damage detection method is proposed.Firstly the influence of the fracture damage to the mode is studied,then the connection and difference between fracture damage and local damage is compared.Based on the above,the parameters of fracture damage are put forward and the damage detection method is advanced with the variation rate of the first mode as damage signature.In the end the circular plate with fracture damage is detected with the damage detection method,the result shows that the new method is effective.

关 键 词：裂纹损伤 局部损伤 一阶振型变化率 损伤诊断 损伤标识量 

分 类 号：O327[理学—一般力学与力学基础]