[1]傅蕾,金星,李军.近场大位移下GPS与强震仪记录的差异性分析[J].地震工程与工程振动,2017,01(05):011-24.[doi:10.13197/j.eeev.2017.05.11.ful.002]
 FU Lei,JIN Xing,LI Jun.Difference analysis of large displacement observation ability of GPS and strong motion intrument[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2017,01(05):011-24.[doi:10.13197/j.eeev.2017.05.11.ful.002]
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近场大位移下GPS与强震仪记录的差异性分析
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《地震工程与工程振动》[ISSN:/CN:]

卷:
01
期数:
2017年05期
页码:
011-24
栏目:
论文
出版日期:
2017-10-01

文章信息/Info

Title:
Difference analysis of large displacement observation ability of GPS and strong motion intrument
作者:
傅蕾1 金星12 李军2
1. 福州大学 土木工程学院, 福建 福州 350108;
2. 福建省地震局, 福建 福州 350003
Author(s):
FU Lei1 JIN Xing12 LI Jun2
1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China;
2. Fujian Earthquake Administration, Fuzhou 350003, China
关键词:
GPS强震仪频域积分相关性幅值差异
Keywords:
GPSstrong motion intrumentfrequency domain integralcorrelation analysisamplitude difference
分类号:
P315.8
DOI:
10.13197/j.eeev.2017.05.11.ful.002
摘要:
本文用频域仿真的方法对强震仪加速度记录积分得到位移记录,引入相关系数分析了大位移作用下的强震仪与GPS位移记录的一致性和差异性,结果表明,稳定激发下,两者水平向位移记录的初始相关系数均超过0.8,具有较大的相似度,但仍存在一定的幅值差异,本文主要通过对比分析大位移实验和稳定激发实验来研究该差异性。分析了大位移实验的信噪频谱,大位移实验与稳定激发实验的信号频谱,认为在大位移实验中,强震仪在问题频段的记录很有可能是信号而非噪声。随后,在转角时程中发现,在大转角位移作用下,强震仪和GPS位移记录的差异性表现得更明显,这可能是强震仪受工作原理限制,无法记录到旋转位移所致。随后,本文依据GPS记录的转角信息对强震仪位移进行修正,校正后的位移记录幅值差异明显减小,可以认为由工作原理差异致使参考坐标系的不同是引起两者记录幅值差异的主要原因,同时,也说明GPS能有效的校正强震仪在有转角的复杂观测环境下的位移记录。
Abstract:
In this paper, the method of frequency domain simulation is used to integrate the acceleration records of strong motion instrument to obtain the displacement time history, the consistency and difference between the records of strong motion instrument and the records of GPS are studied by correlation coefficient. The results show that the initial correlation coefficients of the two horizontal displacement records are more than 0.8, and the two records have high similarity, but there are still some differences in the amplitude, this paper mainly through the comparative analysis of large displacement experiments and stability experiment to study this difference, the signal noise spectrum of large displacement experiment, signal spectrum of large displacement experiment and stability experiment are analyzed, we consider that the recording of strong motion instrument in the problem frequency band is likely to be a signal rather than a noise. The rotation angle analysis results show that under the influence of large rotational displacement, the difference between the strong motion records and the GPS records is more obvious, which probably because the rotation displacement can not be recorded by strong motion instrument. According to the rotation angle information recorded by GPS, the simulation displacement of the strong motion instrument is corrected, after the correction, the amplitude difference of the displacement time history is obviously reduced, It can be considered that the difference of the working principle leads to the difference of the reference coordinate system is the main reason for the difference of the two kinds of records, and the GPS can correct the displacement time history of the strong motion instrument in the complex observation environment with rotation.

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备注/Memo

备注/Memo:
收稿日期:2016-07-21;改回日期:2016-12-15。
基金项目:国家自然科学基金项目(41474071)
作者简介:傅蕾(1990-),男,硕士研究生,主要从事GPS测震能力的研究.E-mail:287480279@qq.com
更新日期/Last Update: 2017-10-25