利用孙景江迭代法将抗震设计规范中的设计反应谱转换成功率谱,然后,再用近似转化公式将目标反应谱转化成功率谱,和迭代法转化成的功率谱进行比较.分析表明,采用迭代法求得的功率谱其精度要比采用近似转化公式好,但近似转化公式在高频段的精度也能满足计算要求.%Response spectrum of code for seismic design of buildings was transformed to power spectrum by Sun iteration approach,then compared with another way which by using approximate conversion formula,then analyzed the error between the two ways. It is pointed out that iteration approach has higher accuracy than approximate conversion formula, but the way used by approximate conversion formula could satisfy to demand for accuracy in high frequency band.
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