拟合核电厂设计反应谱及峰值位移的地震动调整方法
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摘要
提出一种以核电厂设计用伪速度反应谱及峰值位移为拟合目标的地震动调整方法。该方法基于样条小波的快速分解与回复算法,将实际地震加速度记录应用2阶基数B-样条小波进行分解,以识别对峰值位移、峰值加速度影响最大的小波分量;并在此基础上,通过改进地震动调整的小波分析法与时域叠加小波函数法,实现对目标反应谱及峰值位移、峰值加速度的同时拟合。算例分析结果表明,该方法具有较高的拟合精度。
A modification method of recorded earthquake ground motion was proposed for matching the design pseudo velocity response spectrum and target peak ground displacement in nuclear power plants.The method applies the second cardinal B-spline wavelet to decompose the recorded real records into the finite wavelet components.Then the wavelet components which mostly affect the peak ground displacement and peak ground acceleration can be searched out.By improving the wavelet-based modifying method and wave-let synthesis method,the earthquake ground motions have been modified to match the target response spec-trum and target peak values of displacement and acceleration.The results of the numerical examples demon-strate that the proposed algorithms boast high precision.
A modification method of recorded earthquake ground motion was proposed for matching the design pseudo velocity response spectrum and target peak ground displacement in nuclear power plants.The method applies the second cardinal B-spline wavelet to decompose the recorded real records into the finite wavelet components.Then the wavelet components which mostly affect the peak ground displacement and peak ground acceleration can be searched out.By improving the wavelet-based modifying method and wave-let synthesis method,the earthquake ground motions have been modified to match the target response spec-trum and target peak values of displacement and acceleration.The results of the numerical examples demon-strate that the proposed algorithms boast high precision.
引文
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[3]李忠诚,赵凤新.不同法规关于核电厂设计地震动合成的技术要求比较[J].核动力工程,2006,27(2):17-21.
[4]胡聿贤.地震工程学(第二版)[M].北京:地震出版社,2006.
[5]杨庆山,姜海鹏.基于相位差谱的时频非平稳人造地震动的反应谱拟合[J].地震工程与工程振动,2002,22(1):32-38.
[6]Lihanand K,Tseng W S.Development and Application of Realistic Earthquake Time Histories Compatible with Multi-Damping Design Spectra[C].Proceedings of the 9th World Conference on Earthquake Engineering,9WCEE Organizing Committee,Tokyo Japan,Ⅱ,819-824.
[7]Hancock J,Watson-Lamprey J,Abrahamson N A,et al.An Improved Method of Matching Response Spectra of Record Earthquake Ground Motion Using Wavelets[J].Journal of Earthquake Engineering,2006,10(1):67-89.
[8]Mukherjee S,Gupta V K.Wavelet-Based Generation of Spectrum Compatible Time-Histories[J].Soil Dynamics and Earthquake Engineering,2002,22:799-804.
[9]谢异同,张同亿,吴敏哲.时程分析中设计地震动调整的小波分析方法[J].地震工程与工程振动,2002,3(6):19-23.
[10]崔锦泰.小波分析导论[M].西安:西安交通大学出版社,1995.
[11]Trifunac M D.Low Frequency Digitization Errors and a New Method for Zero Baseline Correction of Strong-Motion Accelerograms[R].California Institute of Technology,Report No.EERL70-07September,1970.
[2]赵凤新,张郁山.拟合峰值位移与目标反应谱的人造地震动[J].核动力工程,2007,28(2):38-41.
[3]李忠诚,赵凤新.不同法规关于核电厂设计地震动合成的技术要求比较[J].核动力工程,2006,27(2):17-21.
[4]胡聿贤.地震工程学(第二版)[M].北京:地震出版社,2006.
[5]杨庆山,姜海鹏.基于相位差谱的时频非平稳人造地震动的反应谱拟合[J].地震工程与工程振动,2002,22(1):32-38.
[6]Lihanand K,Tseng W S.Development and Application of Realistic Earthquake Time Histories Compatible with Multi-Damping Design Spectra[C].Proceedings of the 9th World Conference on Earthquake Engineering,9WCEE Organizing Committee,Tokyo Japan,Ⅱ,819-824.
[7]Hancock J,Watson-Lamprey J,Abrahamson N A,et al.An Improved Method of Matching Response Spectra of Record Earthquake Ground Motion Using Wavelets[J].Journal of Earthquake Engineering,2006,10(1):67-89.
[8]Mukherjee S,Gupta V K.Wavelet-Based Generation of Spectrum Compatible Time-Histories[J].Soil Dynamics and Earthquake Engineering,2002,22:799-804.
[9]谢异同,张同亿,吴敏哲.时程分析中设计地震动调整的小波分析方法[J].地震工程与工程振动,2002,3(6):19-23.
[10]崔锦泰.小波分析导论[M].西安:西安交通大学出版社,1995.
[11]Trifunac M D.Low Frequency Digitization Errors and a New Method for Zero Baseline Correction of Strong-Motion Accelerograms[R].California Institute of Technology,Report No.EERL70-07September,1970.
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