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本文简要地总结了国外进行人造地震波的研究概况,并从工程角度出发,对满足平滑设计谱的人造地震波的合成方法进行了研究,并编制了计算机程序。这一方法是将地震运动表示为具有均匀分布随机相角的谐波振功的线性组合,然后,反复调整其富氏谱的幅值,强迫其反应谱逐步地收敛于平滑的设计谱,以获得与地震烈度和反应谱等价的人造地面加速度时程曲线,为重要工程的动态设计提供依据。
This paper briefly summarizes the research progress of artificial seismic waves in foreign countries, and from the engineering point of view, studies the synthesis method of artificial seismic waves that satisfies the smooth design spectrum and prepares computer programs. This method expresses the seismic motion as a linear combination of harmonic power with uniformly distributed random phase angles. Then, it repeatedly adjusts the magnitude of the Fourier spectrum to force its response spectrum to gradually converge to a smooth design spectrum. Obtaining artificial ground acceleration time history curves equivalent to seismic intensity and response spectra provides a basis for dynamic design of important projects.