摘要
采用数值模拟方法,研究了仪器响应失真的高精度校正方法对强震仪有效观测频带的延拓能力与加速度摆自振频率和阻尼比之间的关系。研究结果表明:只要加速度摆的自振频率不小于10Hz,阻尼比不小于0.05,通过对仪器响应失真进行高精度校正,完全可以使强震仪输出信号有效频带的上限延拓到80Hz。
By numerical simulation, the ability of highly-precise method for instrument response distortion correction in extending the effective observation frequency band was studied in the case of different values of the aecelerometers natural frequency and damping ratio. The results show that the effective signal frequency band of the strong motion seismograph could be extended to 80Hz in the condition that the accelerometer＇ s natural frequency is no less than 10Hz and its damping ratio is no less than 0.05.
出处
《地震工程与工程振动》
CSCD
北大核心
2009年第4期197-200,共4页
Earthquake Engineering and Engineering Dynamics
基金
东北电力大学博士科研启动基金项目(BSJXM-200713)
关键词
数字强震仪
力平衡加速度摆
仪器响应失真校正
有效观测频带
digital strong motion seismograph
force-balance accelerometer
instrument response distortion correction
effective observation frequency band
