基于Kameda模型的爆炸地震动时变功率谱拟合

Fitted Evolutionary Power Spectra of Explosive Ground Motion Based on Kameda Model

借鉴非平稳地震动研究方法,采用Kameda时变功率谱模型进行爆炸地震动拟合,结合实际爆炸地震动分析了Kameda时变功率谱模型的合理性,通过比较拟合时程与记录时程的加速度、反应谱、强度包线以及累积穿零次数,验证Kameda模型的可行性。研究表明:基于Kameda时变功率谱模型能够实现时频非平稳爆炸地震动的拟合。

Based on the non-stationary vibration method,the Kameda evolutionary power spectrum model was used to simulate the explosive ground motion. The rationality of the Kameda evolutionary power spectrum was analyzed by combining the actual explosive ground motion. The feasibility of the Kameda model was verified by comparing the acceleration,the response spectrum,the intensity envelope and the cumulative times of zero-crossing of the fitting time history and the recorded time history. The research shows that the time-frequency non-stationary explosive ground motion can be fitted by the Kameda evolutionary power spectrum model.