多缺陷框架结构的波动响应  

Dynamic response of multi-defective frame structure

作　　者：余云燕[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《振动工程学报》2008年第5期511-515,共5页Journal of Vibration Engineering

基　　金：教育部科学技术研究重点资助项目(208150);兰州交通大学"青蓝"人才工程基金资助计划资助项目(QL0507A);甘肃省自然科学基金资助项目(3ZS061-A25-042)

摘　　要：局部缺陷用减小杨氏模量和剪切模量来简化,研究了多缺陷框架在阶跃荷载作用下的轴向速度波,判别缺陷是否存在、确定缺陷位置和程度,并与无缺陷框架比较。结果表明:对多缺陷框架的每一节点分别施加阶跃荷载,分析荷载作用点或荷载作用点附近接收点的信号,可准确判定多缺陷框架所有杆件的缺陷信息。Assume that local defects were modified by reduced Yang＇s modulus and shear modulus. The axial velocity of multi-defective frame structure was researched acted by a step loading. So, the defect was distinguished, and the defective position and degree were determined. The axial velocity of multi-defective frame structure was compared with that of perfect frame structure. The results indicated that defective information of all members of frame structure can be determined accurately, while every nodes of multi-defective are acted by a step loading respectively and the receiver＇s signals are analyzed at the loading point or near to it.

关 键 词：框架结构 回传射线矩阵法 缺陷检测 弹性波 

分 类 号：TU323.5[建筑科学—结构工程]