【摘要】 以实测环境振动波作为输入波,采用有限元方法,以加速度作为指标,在时域和频域内深入研究各种振动波在框架结构内的传播规律。研究结果表明:环境振动波和地震波的主要频谱范围存在明显差异,环境振动波相互之间的频谱分布范围也有较大不同;由于输入振动波主要频率范围的不同,加速度在楼层间的传播特点不尽相同;振级在楼层间的分布特点与加速度峰值有不同;存在一个结构高宽比使得分析结构的竖向加速度峰值响应最大。更多还原

【Abstract】 Taking the measured environmental vibration wave as input and taking the acceleration velocity as index,the finite element method is used for studying the propagation regulation in frameworks for different vibration waves in time domain and frequency domain.The study results show that the frequency spectrum of the environmental vibration wave is obviously distinct from that of seismic wave,and the frequency spectra between the environmental vibration waves are also greatly distinct;Due to the different dominant frequencies,the propagation properties of the acceleration in the frame are different.The propagation regulation for vibration level in the frame is different from the acceleration peak.The existing depth-width ratio of the frame would make the vertical acceleration peak value in the frame induced by vibration wave being largest.更多还原