柱壳结构体系的损伤诊断  

Damage Diagnosis of the Cylindrical Shell Structure System

作　　者：许金余[1] 张其顶[1] 李海川[2] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710072 [2]空军工程大学工程学院,西安710038

出　　处：《振动．测试与诊断》2008年第1期1-4,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:10372084)

摘　　要：由于对柱壳结构的损伤部位和程度进行诊断是确保柱壳结构安全可靠的重要保证,采用振动理论对柱壳结构体系进行损伤分析,利用同阶特征对比值变化量和应变模态差作为损伤诊断因子。数值模拟计算结果表明,这两个变量作为损伤诊断因子,能够凸现柱壳结构的损伤部位及损伤程度大小;运用这两个变量诊断非贯穿性小损伤,能够很好地显现损伤部位和损伤程度;计算结果也表明,柱壳结构对损伤部位较为敏感,腰部损伤比顶部损伤对柱壳结构的影响大。The damage position and degree diagnosis of the cylindrical shell structure guarantees the safety and reliability of the structure.So the paper adopts the vibration theory to analyze the damage of the cylindrical shells structure,and takes the same mode eigenparameters change ratio and the strain mode difference as the index of the damage diagnosis.The numerical simulation indicates that the two indexes can detect the damage position and degree distinctly.And the tiny damage which the missiles hadn't drill through the cylindrical shell concrete structure can be also detected by the same method.Furthermore the simulation results show that the cylindrical shell concrete structure is sensitive to the damage position,the top damage and waist damage of the structure are different,the waist damage is more severely than the top one of the cylindrical shell concrete structure.

关 键 词：振动理论 柱壳结构 损伤诊断因子 同阶特征对比值变化量 应变模态差 

分 类 号：TU311[建筑科学—结构工程]