基于小波变换的地震地面运动仿真研究

英文篇名：STUDY ON THE SIMULATION OF EARTHQUAKE GROUND MOTIONS BASED ON WAVELET TRANSFORM
中文刊名：土木工程学报
作者：曹晖 ; 赖明 ; 白绍良
英文作者：Cao Hui 1 Lai Ming 2 Bai Shaoliang 1(1 Faculty of Civil Engineering of Chongqing University) (2 Science and Technology Department of Construction Ministry)
中文关键词：地震动仿真 ; 小波变换 ; 时变谱
英文关键词：simulation of earthquake motions.wavelet transform ; time-dependent spectrum
出版日期：2002-08-30
机构：重庆大学 ,建设部 ,重庆大学
年：2002
期：04
出版单位：土木工程学报

摘要

运用小波变换估计的实际地震波时变谱和三角级数法进行非平稳的地震动仿真研究 ,与基于多重过滤和短时傅氏变换的仿真结果比较 ,表明小波变换估计的时变谱更真实、准确地反映了地震动的非平稳性质 ,生成的人造波与实际地震波在时频特性上更为接近
The time-dependent spectrum of an earthquake wave estimated by the wavelet transform is proposed in the paper.Then,the simulation of earthquake motions is studied with the spectrum and trigonometric series.Another approach is used with the multi-filter and short-time Fourier transform(STFT);two results are compared.The spectrum is more precisely obtained by the proposed method;it can well reflect the behavior of the earthquake motion.The resulted artificial wave is more like the actual wave in the time frequency domain.

引文

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