PSI - Issue 60

Keshav Mohta et al. / Procedia Structural Integrity 60 (2024) 402–410 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

409

8

38 40 42 44 46 48 50

(a)

Force (N)

No Pulsation

40 kPa Pulsation

0.3

0.32

0.34

0.36

0.38

0.4

Transient loading duration (Sec)

15

No Pulsation

40 kPa Pulsation

12

0 Incremental slip (x 10 -3 μ ) 3 6 9

(b)

0.3

0.32

0.34

0.36

0.38

0.4

Transient loading duration (Sec)

Fig. 7. Comparison of (a) contact force, and (b) incremental sliding at BP 12 for no pulsation and pulsating flow conditions

Initial work rate at the bearing pad locations is evaluated as per procedure specified in section 2.3 above and is furnished in Table 1 below.

Table 1. Initial normal work rate at bearing pad locations Pulsation (kPa)

Initial normal work rate at bearing pad (mW) BP11 BP12 BP13

BP14

Average

0

0.36 0.97

0.31 0.92

0.28 0.86

0.22 0.75

0.29 0.87

40

Average saturated fret depth, as per the procedure specified in section 2.4 has been evaluated and furnished in Table 2 below:

Table 2. Average saturated fret depth at bearing pad locations Pulsation (kPa)

Average saturated fret depth (μ), (K = 1118 x10 -15 Pa -1 ) BP11 BP12 BP13 BP14

Average

0

11.9 31.5

10.1 29.9

9.2

7.2

9.6

40

28.0

24.4

28.5