PSI - Issue 58

Dipendra Gautam et al. / Procedia Structural Integrity 58 (2024) 102–108 D. Gautam et al. / Structural Integrity Procedia 00 (2019) 000–000

106

5

Fig. 4. FRF plots for: (a) 2019 measurement; (b) 2023 measurement.

Stabilization Diagram

10 -8

20

18

16

14

12

10 -9

10

Magnitude

8 Model Order

6

Stable in frequency Stable in frequency and damping Not stable in frequency Averaged response function

4

2

10 -10

0

5

10

15

20

25

30

Frequency (Hz)

Fig. 5. Stabilization diagram plotted together with the frequency response function.

Table 1. Modal frequencies of Ananda Niketan obtained from 2019 and 2023 measurements.

Mode no.

2019 measurement frequency

2023 measurement frequency

X (Hz)

Y (Hz)

X (Hz)

Y (Hz)

I

2.60

3.86

2.57 7.57

2.16 7.49

II

13.38 24.10 42.50

19.97 26.25 43.64

III IV

20.47 28.87

16.89 24.77