摘要
基于结构动力学的基本理论,分析了悬臂工字型钢梁的振动模态特性,推导出结构损伤因子与损伤位置和损伤程度的函数关系.根据结构频率响应,运用频率平方变化比的方法进行结构损伤的初步检测与评估.应用ANSYS有限元分析软件对一悬臂工字型钢梁在11种工况下进行模拟计算,采用单元刚度折减来模拟结构损伤,并对工字型钢梁进行模型实验.
The vibration properties of cantilever H steel beam were investigated based on the basic theory of structural dynamics.Structural damage factor was derived as a function of damage location and damage degree.According to the structural frequency response,the frequency square change ratio method was used in preliminary testing and evaluation of structural damage.Finite element analysis software ANSYS was applied to simulate and analyse a cantilever H steel beam under 11 working conditions.In the similation,the element stiffness reduction was adopted to simulate structural damage.Then model tests for the H steel beam were carried out.The calculation and analysis results are of great significance to the damage detection and recognition of cantilever H steel beam structures.
出处
《上海理工大学学报》
CAS
北大核心
2014年第5期497-501,共5页
Journal of University of Shanghai For Science and Technology
基金
国家自然科学基金资助项目(51208300)
关键词
结构损伤
频率响应
悬臂工字型钢梁
有限元分析
损伤检测
structural damage
frequency response
cantilever H steel beam
finite element analysis
damage detection
作者简介
周奎（1970-），男，副教授．研究方向：结构损伤检测．E-mail：zhoukui-sh@163．com
