基于希尔伯特变换的非平稳地震动模拟方法的验证

摘要

The non-stationary ground motion simulation method based on Hil-bert transform can generate a series of artificial ground motion samples that pos-sess the non-stationary characteristics similar to the given natural ground mo-tion.The effectiveness of this method in simulating the time-domain waveform features and the time-frequency distribution of energy of the natural ground mo-tion has been validated.In this paper,based on the elastic-plastic seismic re-sponses of ideal single-degree-of-freedom system,the effectiveness of this meth-od in simulating the impacts of the natural ground motion on structures are vali-dated.The results show that,the method can simulate well the engineering properties of natural ground motions,and the structural elastic-plastic seismic responses evoked by the ground motion samples generated by this method have the similar characteristics to the responses caused by natural ground motion.%基于希尔伯特变换的非平稳地震动模拟方法能够生成一系列地震动样本，具有与给定天然地震动相似的非平稳特征。该方法在模拟天然地震动时域波形的形态和能量的时频分布方面，效果非常显著且已得到验证。本文以理想单自由度体系弹塑性地震反应为基础，深入验证该方法在模拟天然地震动对结构影响效应方面的效果。研究结果表明，该方法能够较好地模拟天然地震动的工程特性，其生成的地震动样本的峰值特性及其引起的结构弹塑性地震响应具有与天然地震动相似的特征。