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借鉴完全非平稳地震动的研究方法,将VLACHOS C提出的完全非平稳时变Kanai-Tajimi模型用于爆炸地震动的拟合。结合实际爆炸地震动对这两种模型进行分析验证,通过比较拟合爆炸地震动与实际爆炸地震动的加速度时间历程曲线、反应谱、强度包线、归一化累积能量以及累积穿零次数,从时域和频域两方面来分析拟合效果,通过研究表明,单峰时变Kanai-Tajimi模型更适合用于爆炸地震动的拟合。
A completely nonstationary time-varying Kanai-Tajimi model proposed by VLACHOS C is applied to the fitting of explosion ground motion, referring to the research method of completely non-stationary ground motion. Combining the actual explosion ground motions, the two models are analyzed and verified. By comparing the acceleration time history curve, response spectrum, strength envelope, normalized cumulative energy and the cumulative number of times of zero crossing for fitting the ground motions and the real ground motions, The fitting effect is analyzed from the time domain and the frequency domain. The results show that the singularly time-varying Kanai-Tajimi model is more suitable for the fitting of explosive ground motion.