【摘要】 人工时程是核电站反应堆厂房楼层反应谱计算的关键输入数据。采用单组人工时程分析法不仅需要匹配目标反应谱,而且要满足功率谱密度的包络要求。本文提出同时满足目标反应谱匹配和功率谱密度包络要求的人工时程生成算法。该方法在分别与目标反应谱和功率谱密度对应的有效频率带宽内调整傅立叶幅值谱,并通过迭代达到要求。数值算例表明,该算法得到的人工时程在对目标反应谱拟合精度较高的同时,满足对功率谱密度的包络要求。更多还原

【Abstract】 Artificial time histories are key data inputs for the calculation of floor spectra of the contain-ment building in nuclear power plants. The application of the single-ground-motion analysis method shall meet the requirements of envelop of the power spectral density as well as fitting of the target response spec-trum. This paper presents a generation algorithm of artificial time histories in order to meet the needs of both fitting of the target response spectrum and envelop of the power spectral density. The Fourier amplitude spec-trum is modified within the effective frequency bandwidths defined for the target response spectrum and power spectral density respectively in this algorithm, and iterations are used in order to meet the correspond-ing requirements. The numerical examples demonstrate that the artificial time history generated by this algo-rithm reaches high fitting precisions to the target response spectrum and meets the need of envelop of the power spectral density.更多还原