摘要
为了利用高频卫星定位导航系统(GNSS)获取的位移记录研究结构动力响应,推导了位移输入的单自由度系统地震响应递归公式.在频域上对递归公式传递函数进行了幅频、相频分析,检验了公式的计算精度.结果显示:ωΔt越小,递归公式的计算精度越高;ωΔt越大,递归公式的计算精度越低;ωΔt<0.314时,递归公式的计算精度可满足工程需要.研究表明,在满足采样率条件下,公式可获得较高精度的结构响应.
In order to study the structural dynamic response by using the seismic records obtained by high frequency GNSS,the recursive formulas of the seismic response of a single-degree-of-freedom system with displacement input are derived.The transfer functions of the recursive formulas are analyzed in frequency domain,and the accuracy of the formulas is verified.The results show that the higher the sampling rate of GNSS displacement is,the closer the transfer function of recursive formula approximates the theoretical transfer function,and whenωΔt<0.314 the calculation accuracy of recursive formula can meet the engineering needs.The study shows that the 1 Hz displacement record can obtain high precision structural response through the displacement input formula.
作者
鲁兵
LU Bing(Department of Civil Engineering,Putian University,Putian 351100,Fujian,China)
出处
《兰州文理学院学报（自然科学版）》
2019年第5期47-50,共4页
Journal of Lanzhou University of Arts and Science(Natural Sciences)
基金
莆田市科技计划项目(2018SP3002)
莆田学院科研创新专项基金项目(2017018)
关键词
位移
结构响应
计算精度
displacement
structural response
calculating accuracy
