基于环境激励的随机子空间法模态试验与仿真分析
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摘要
以1幢6层钢框架结构为例,分别采用基于环境激励的随机子空间模态识别法(SSI)与频域分解法(FDD)从加速度测试信号中识别其模态参数,识别结果一致.最后选用SSI法对试验的有限元模型进行了仿真分析.研究表明:仿真与测试分析结果吻合较好,具有可靠的精度和一定的适用性.
Taking a six-story steel frame as an example,the method of stochastic subspace identification(SSI) is used to identify the modal parameters from the tested acceleration signals,and the correctness is verified by the method of frequency domain decomposition(FDD).Then the simulation analysis of the tested finite element model based on SSI is conducted and the results match well with the tested ones,which indicate that the method of simulation analysis is reliable and applicable.
Taking a six-story steel frame as an example,the method of stochastic subspace identification(SSI) is used to identify the modal parameters from the tested acceleration signals,and the correctness is verified by the method of frequency domain decomposition(FDD).Then the simulation analysis of the tested finite element model based on SSI is conducted and the results match well with the tested ones,which indicate that the method of simulation analysis is reliable and applicable.
引文
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[2]HUANG C S.Structural identification from ambient vibration measurement using the multivariate AR model[J].Journal ofSound and Vibration,2001,241(3):337-359.
[3]PEETERS B,DE R G.Reference-based stochastic subspace identification for output-only modal analysis[J].MechanicalSystems and Signal Processing,1999,13(6):855-878.
[4]YAO Zhi-yuan,WANG Feng-quan.Method of identification of a structural physical parameters based continuous time model[J].Journal of Southeast University:Natural Science Edition,2003,33(5):615-620.(in Chinese)
[5]JIA Qun-lin,ZHOU Bai-jia.Earthquake disaster scenario simulation technology[J].Journal of Computer Research and De-velopment,2010,47(6):1038-1043.(in Chinese)
[6]JIA Yong-sheng,XIE Xian-qi,LI Xin-yu,et al.Numerical simulation for demolition of structures[J].Rock and Soil Me-chanics,2008,29(1):285-288.(in Chinese)
[7]ZHAO Zhi-ping,HAN Chun-min,HUANG Yuan.The whole simulation on bending resistance of reinforced concrete beams[J].Sichuan Building Science,2007,33(3):40-43.(in Chinese)
[8]LI Hui,WANG Xue-guo,HE Guo-wu.Finite element simulation on prestressed conditions of prestressed concrete compo-nents[J].Shanxi Architecture,2011,37(21):24-26.(in Chinese)
[9]ZHAO Bao-guo.The simulation analysis of load test on bridge[J].Shanxi Science and Technology of Communications,2008(4):45-49.(in Chinese)
[10]RUNE B,ZHANG L M,PALLE A.Modal identification from ambient responses using frequency domain decomposition[C]∥Proceeding of 18th MAC,San Antonio,Texas,2000.
[4]姚志远,汪凤泉.基于连续模型的大型结构模态参数识别[J].东南大学学报:自然科学版,2003,33(5):615-620.
[5]贾群林,周柏贾.地震灾害场景仿真模拟的研究与应用[J].计算机研究与发展,2010,47(6):1038-1043.
[6]贾永胜,谢先启,李欣宇,等.建(构)物控制爆破拆除的仿真模拟[J].岩土力学,2008,29(1):285-288.
[7]赵志平,韩春民,黄渊.钢筋混凝土梁抗弯性能的全仿真模拟[J].四川建筑科学研究,2007,33(3):40-43.
[8]李汇,王学国,何国武.预应力混凝土构件预应力状况的有限元仿真[J].山西建筑,2011,37(21):24-26.
[9]赵保国.运营桥梁检测仿真模拟[J].山西交通科技,2008(4):45-49.
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