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地震时程分析的时频联合缩减法

, PP. 61-67

Keywords: 动态时程法,魏格纳-维尔分布,小波变换,有限元分析

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Abstract:

为了减少动态时程法的计算开销,根据地震时程记录的能量在时间-频率域内主要集中在特定时间段和低频分量中的特点,用离散小波变换,变采样率重构时程记录,以达到在时程计算时减少积分步数,节约计算时间的目的。通过有限元数值实验,表明该法可有效缩短计算时间,同时计算误差不超过5%,在工程范围内可以接受。

References

[1]  彭俊生, 罗永坤, 彭 地. 结构动力学、抗震计算与SAP2000应用[M]. 四川:西南交通大学出版社,2007. PENG Junsheng,LUO Yongkun,PENG Di. Dynamics of structures,earthquake resistance and the application of SAP2000[M].Sichuan:Southwest Jiaotong University Press,2007.(in Chinese)
[2]  朱镜清. 结构动力学问题中积分格式的稳定性[J]. 地震工程与工程振动, 1983,3 (3) :1-10. ZHU Jingqing. Stability of the integral form in dynamics of structures[J].Journal of Earthquake Engineering and Engineering Vibrations, 1983, 3 (3) :1-10.(in Chinese)
[3]  Eysa Salajegheh,Ali Heidari. Time history dynamic analysis of structures using filter banks and wavelet transforms[J]. Computers and Structures, 2005, 83:53-68.
[4]  Hlawatsch F,Kozek W.Time-frequency projection filters and time-frequency signal expansions[J]. IEEE Trans, Signal Processing,1994, 42(12):3321-3343.
[5]  Janssen A J E M.Optimality property of the Gaussian window spectrogram[J]. IEEE Trans, Signal Processing,1991,39(1) :202-204.
[6]  Morris J M,Wu D.On alias-free formulation of discrete-time Cohen’s class of distributions[J]. IEEE Trans, Signal Processing,1996, 44: 1355-1364.
[7]  Jeong J,Williams W. Kernel design for reduced interference distributions[J]. IEEE Trans, Signal Processing,1992, 40 :402-412.
[8]  Qian Shie. Introduction to Time-frequency and wavelet transforms[M]. 北京:机械工业出版社,2004.
[9]  Qian S,Morris J M . Wigner distribution decomposition and cross-term deleted representation[J].Signal Processing,1992, 25(2) :125-144..
[10]  Bianu M Isar A. The reduction of interference terms in the time-frequency plane[J].Signals, Circuits and Systems, 2003, 12: 461-464.
[11]  刘文彬, 郭 瑜, 李之雄. 基于Gabor展开的Wigner-Ville分布的交叉项消除[J]. 振动与冲击, 2008, 27(10):121-126. LIU Wenbin,GUO Yu,LI Zhixiong. Removal of crossing-items of WVD based on Gabor expansion[J]. Journal of Vibration and Shock,2008, 27(10) : 121-126.(in Chinese)
[12]  Stéphane Mallat. A wavelet tour of signal processing[M].znd ed.Beijing:China Machine Press,2008.
[13]  Adhemar Bultheel.Wavelets with applications in signal and image processing[M].BeiJing:China Machine Press,2003.
[14]  樊 剑,吕 超,张 辉,等. 基于S变换的地震波时频分析及人工调整 [J]. 振动工程学报,2008, 21(4): 381-386. FAN Jian,LU Chao,ZHANG Hui,et al.Time-frequency analysis and artificial simulation of earthquake ground motions via S-transform[J]. Journal of Vibration. 2008, 21(4): 381-386.(in Chinese)

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