Advances in Civil Engineering / 2019 / Article / Tab 3

Research Article

Monitoring and Identification of Vibration Frequencies on a Portion of México City Metro Line 12

Table 3

Identified frequencies and standard deviation by section in column 5 calculated for period before and after significant events.

Date periodRecursive N4SIDRecursive MOESPSpectral analysis

04/08/12–09/05/132.185.432.085.432.145.35
30/10/132.305.652.275.652.245.60
21/04/14–22/04/142.225.622.215.712.195.61

12/05/15–31/08/152.30 ± 0.045.71 ± 0.062.28 ± 0.145.75 ± 0.082.32 ± 0.015.66 ± 0.05
01/11/15–10/11/162.32 ± 0.045.60 ± 0.042.29 ± 0.105.60 ± 0.162.34 ± 0.035.58 ± 0.04
11/11/16–30/08/172.32 ± 0.045.60 ± 0.032.27 ± 0.115.60 ± 0.102.34 ± 0.035.57 ± 0.03
01/09/17–19/09/172.32 ± 0.045.65 ± 0.042.30 ± 0.115.68 ± 0.062.34 ± 0.035.61 ± 0.03
20/09/17–30/09/172.25 ± 0.035.59 ± 0.032.22 ± 0.075.67 ± 0.172.30 ± 0.025.57 ± 0.03
01/10/17–30/01/182.27 ± 0.045.58 ± 0.032.26 ± 0.135.60 ± 0.152.32 ± 0.025.54 ± 0.03
01/02/18–16/02/182.28 ± 0.025.57 ± 0.052.28 ± 0.085.57 ± 0.092.31 ± 0.025.54 ± 0.03
17/02/18–28/02/182.29 ± 0.025.56 ± 0.042.32 ± 0.075.56 ± 0.112.30 ± 0.035.53 ± 0.03

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