柱壳结构体系的损伤诊断
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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.
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.
引文
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[3]Stankevish A,Evkin A Y,Veretennikov S A.Stability of thin spherical shells under dynamic loading[J].Prikladnaya Mekhanika,1993(1):41-48.
[4]Patel S,Ibrahim S S,Yehia M Y,et al.Investigation of premixed turbulent combustion in a semi-confined explosion chamber[J].Experimental Thermal and Fluid Science,2003(27):355-361.
[5]李霆,张东利,孙锡龙.应变振型损伤特征量在混凝土结构损伤诊断中的应用[J].振动与冲击,2004(1):105-107.
[6]李德葆,陆秋海.实验模态分析及其应用[M].北京:科学出版社,2001.
[7]Yuen M M F.A numerical study of the eigenparameters of a damaged cantilever[J].Journal of Sound and Vibration,1985(103):301-310.
[8]邓焱,严普强.梁及桥梁应变模态与损伤测量的新方法[J].清华大学学报,2000(5):123-127.
[9]瞿伟廉,陈超,魏文辉.基于应变模态的钢结构构件焊缝损伤定位方法的研究[J].世界地震工程,2002(2):1-8.
[10]杜思义,陈淮.基于应变模态法识别刚架桥梁的损伤[J].世界地震工程,2003(3):112-115.
[11]顾培英,陈厚群,李同春,等.用应变模态技术诊断梁结构的损伤[J].地震工程与工程振动,2005(4):50-53.
[12]Khaled A A N.New method for structural damage identificationusing experimental modal analysis[D].[S.l.]:King Abdulaziz University,2000.
[13]陆秋海,周舟,李德葆,等.结构应变模态辨识的特征系统实现方法[J].机械强度,2004,26(1):1-5.
[14]许金余,张其顶,宋洪斌,等.基于模态分析的钢结构损伤识别方法研究[J].机械科学与技术,2007,26(2):206-208.
[15]陈学前,陈大林.基于强迫振动响应的结构损伤识别[J].振动、测试与诊断,2005(2):98-100.
[2]Martimeau R L,Anderson C A.Expansion of cylinder shells subjiected to internal explosivedetonations[J].Experimental Mechanics,2000,40(2):219-225.
[3]Stankevish A,Evkin A Y,Veretennikov S A.Stability of thin spherical shells under dynamic loading[J].Prikladnaya Mekhanika,1993(1):41-48.
[4]Patel S,Ibrahim S S,Yehia M Y,et al.Investigation of premixed turbulent combustion in a semi-confined explosion chamber[J].Experimental Thermal and Fluid Science,2003(27):355-361.
[5]李霆,张东利,孙锡龙.应变振型损伤特征量在混凝土结构损伤诊断中的应用[J].振动与冲击,2004(1):105-107.
[6]李德葆,陆秋海.实验模态分析及其应用[M].北京:科学出版社,2001.
[7]Yuen M M F.A numerical study of the eigenparameters of a damaged cantilever[J].Journal of Sound and Vibration,1985(103):301-310.
[8]邓焱,严普强.梁及桥梁应变模态与损伤测量的新方法[J].清华大学学报,2000(5):123-127.
[9]瞿伟廉,陈超,魏文辉.基于应变模态的钢结构构件焊缝损伤定位方法的研究[J].世界地震工程,2002(2):1-8.
[10]杜思义,陈淮.基于应变模态法识别刚架桥梁的损伤[J].世界地震工程,2003(3):112-115.
[11]顾培英,陈厚群,李同春,等.用应变模态技术诊断梁结构的损伤[J].地震工程与工程振动,2005(4):50-53.
[12]Khaled A A N.New method for structural damage identificationusing experimental modal analysis[D].[S.l.]:King Abdulaziz University,2000.
[13]陆秋海,周舟,李德葆,等.结构应变模态辨识的特征系统实现方法[J].机械强度,2004,26(1):1-5.
[14]许金余,张其顶,宋洪斌,等.基于模态分析的钢结构损伤识别方法研究[J].机械科学与技术,2007,26(2):206-208.
[15]陈学前,陈大林.基于强迫振动响应的结构损伤识别[J].振动、测试与诊断,2005(2):98-100.
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