新型大跨度空间结构损伤动力特性数值研究
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摘要
以新型空间结构为研究对象,建立了ANSYS有限元模型,对结构的模态频率、模态振型、单频激励响应及白噪声激励下的结构响应进行了较为全面的研究。研究发现:虽然损伤对结构模态频率并不敏感,但振型对损伤却有着相当高的敏感程度;同时对结构的谐响应分析和三维白噪声激励分析发现:损伤不仅仅会对已参与结构振动的模态振型产生影响,同时还会导致产生新生的模态参与到结构的振动中及消亡部分已参与到结构振动中的模态,损伤还会造成结构模态的跃迁等现象。诸多的损伤对空间结构在动力特性方面造成的影响都为其损伤识别提供了全新的参考信息和全新的思路。
In this paper,the finite element model of the National Aquatics Center structures is established,and the further studies of the structure modal frequencies,the modal vibration shapes,the single-frequency excitation responses,and the structure responses under the white nose are carried out.The results show that the structure modal frequencies have no sensitive to the structure damages,however,the vibration shapes have a high sensitization to the ones;at the meantime,discovered from the simple harmonic analysis and the three-dimensional white nose excitation analysis,the structure damages not only have some effects on the modal vibration shapes provoked in the structure vibration,but can lead to the new modals provoking into the structure vibration and some vibration shapes losing as well,and the structure modal transition phenomenon.The effects of the damages to the space structure dynamic properties give some new reference informations and thoughts on the damage identification.
In this paper,the finite element model of the National Aquatics Center structures is established,and the further studies of the structure modal frequencies,the modal vibration shapes,the single-frequency excitation responses,and the structure responses under the white nose are carried out.The results show that the structure modal frequencies have no sensitive to the structure damages,however,the vibration shapes have a high sensitization to the ones;at the meantime,discovered from the simple harmonic analysis and the three-dimensional white nose excitation analysis,the structure damages not only have some effects on the modal vibration shapes provoked in the structure vibration,but can lead to the new modals provoking into the structure vibration and some vibration shapes losing as well,and the structure modal transition phenomenon.The effects of the damages to the space structure dynamic properties give some new reference informations and thoughts on the damage identification.
引文
[1]郭海山.单层球面网壳结构动力稳定性及抗震性能研究[D].哈尔滨:哈尔滨工业大学,2002:64～69Guo Hai-shan.Research on Dynamic Stability andAseismic Performance of Single-layer Reticulated Dome[D].Doctoral Dissertation of Harbin Institute ofTechnology Engineering,2002:64～69(in Chinese)
[2]王卓.网壳结构参数识别技术和损伤检测方法研究[D].北京:北京工业大学,2009:64～69Wang Zhuo.Research on Parameter IdentificationTechnique and Damage Detection Method for LatticedShell Structures[D].Doctoral Dissertation of BeijingUniversity of Technology Engineering,2009:64～69(inChinese)
[3]Juang J N,Pappa R S.An Eigensystem RealizationAlgorithm(ERA)for Modal Parameter Identification&Modal Reduction[J].NASA/JPL Workshop on Identification&Control of Flexible Space Structures,1984:99～108
[4]Rune Brincker,Lingmi Zhang,Palle Anderson.Modal Identification from Ambient Responses Using Frequency Domain Decomposition[A].Proc.of the18th IMAC[C],2001:625～629
[5]Tasker F,Bosse A,Fisher S.Real-time Modal Parameter Estimation Using Subspace Methods[J].Applications,Mechanical Systems and Signal Processing,1998,12(6):809～823
[6]顾培英,邓昌,吴福生.结构模态分析及其损伤诊断[M].南京:东南大学出版社,2008:59～79 Gu Pei-ying,Deng Chang,Wu Fu-sheng.Structural Modal Analysis and Damage Diagnosis[M].Nanjing:Southeast University Press,2008:59～79(in Chinese)
[7]Xia Y,Hao H,Zanardo G,Deeks A.Long Term Vibration Monitoring of an RC Slab:Temperature and Humidity Effect[J].Engineering Structures,28(2006)441～452
[8]王维,裴星洙,王星星.罕遇地震作用下框架结构损伤分析[J].工程抗震与加固改造,2011,33(2):22～27 Wang Wei,Pei Xing-zhu,Wang Xing-xing.Analysis of Frame-structure Damage under Rare Earthquake[J].Earthquake Resistant Engineering and Retrofitting,2011,33(2):22～27(in Chinese)
[2]王卓.网壳结构参数识别技术和损伤检测方法研究[D].北京:北京工业大学,2009:64～69Wang Zhuo.Research on Parameter IdentificationTechnique and Damage Detection Method for LatticedShell Structures[D].Doctoral Dissertation of BeijingUniversity of Technology Engineering,2009:64～69(inChinese)
[3]Juang J N,Pappa R S.An Eigensystem RealizationAlgorithm(ERA)for Modal Parameter Identification&Modal Reduction[J].NASA/JPL Workshop on Identification&Control of Flexible Space Structures,1984:99～108
[4]Rune Brincker,Lingmi Zhang,Palle Anderson.Modal Identification from Ambient Responses Using Frequency Domain Decomposition[A].Proc.of the18th IMAC[C],2001:625～629
[5]Tasker F,Bosse A,Fisher S.Real-time Modal Parameter Estimation Using Subspace Methods[J].Applications,Mechanical Systems and Signal Processing,1998,12(6):809～823
[6]顾培英,邓昌,吴福生.结构模态分析及其损伤诊断[M].南京:东南大学出版社,2008:59～79 Gu Pei-ying,Deng Chang,Wu Fu-sheng.Structural Modal Analysis and Damage Diagnosis[M].Nanjing:Southeast University Press,2008:59～79(in Chinese)
[7]Xia Y,Hao H,Zanardo G,Deeks A.Long Term Vibration Monitoring of an RC Slab:Temperature and Humidity Effect[J].Engineering Structures,28(2006)441～452
[8]王维,裴星洙,王星星.罕遇地震作用下框架结构损伤分析[J].工程抗震与加固改造,2011,33(2):22～27 Wang Wei,Pei Xing-zhu,Wang Xing-xing.Analysis of Frame-structure Damage under Rare Earthquake[J].Earthquake Resistant Engineering and Retrofitting,2011,33(2):22～27(in Chinese)
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