拟合目标反应谱的高精度人工加速度时程生成算法及应用

加速度时程是核电厂结构和部件开展抗震分析和试验的重要输入。本文基于改进的窄带时程构造形式，综合应用频域法和时域法，提出一种拟合目标反应谱的高精度人工加速度时程生成算法，通过RG1.60标准反应谱和两个复杂度不同的楼层反应谱拟合测试以验证算法的有效性和稳健性。结果表明：对目标反应谱的拟合相对偏差最大不超过10%；迭代次数少，拟合收敛性好。本文提出的算法可生成高精度的符合法规要求的人工加速度时程，对于核电工程抗震设计具有重要的应用价值。

High-precision Algorithm and Its Application for Generating Artificial Acceleration Time History Compatible with Targeted Response Spectrum

The acceleration time history works as an important input for anti-seismic analysis and test of structure and component in a nuclear power plant. Based on a modified narrow-band time history construction, a high-precision algorithm of generating artificial acceleration time history compatible with the specified target response spectra was proposed by combining both the frequency-domain adjustment method and the time-domain adjustment method. The RG1.60 standard response spectra and two floor response spectra with increased matching complexity were used as samples to test the effectiveness and robustness of the proposed algorithm respectively. The results show that the relative matching deviation doesn’t exceed 10% and good matching convergence is obtained with a few iterations. The algorithm can generate high-precision and nuclear-safety regulatory artificial acceleration time history, and has important application value in the anti-seismic design of nuclear power plant.