Mooring Loads Due to Parallel Passing Ships - State Lands ...

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NFESC TR-6056-OCN Table 1. Parameters for ship models Parameter Moored Ship Passing Ship Deep Draft Shallow Draft L = length 5 ft 5 ft 5 ft B = Beam 8.9 in 9.2 in 9.2 in D = Draft 3.7 in 3.7 in 1.75 in ∆ = Displacement 51.6 lbs 59.0 lbs 27.9 lbs CB = Block Coef 0.75 0.8 0.8 Figure 8. Photographs of Series 60 Models 10
Test Conditions Test conditions are listed in Tables 2, 3, and 4. Table 2 gives test conditions in model-scale units. Table 3 then gives comparable test conditions for an assumed fullscale ship. While model test results may, in principle, be scaled up to any full-scale ship size, values in Table 3 give an indication of values for a PANAMAX-size vessel where the beam is limited to 104 feet. Values listed in Table 2 are exact except for the passing ship speeds. The variable-speed drive motor used on the towing carriage required a manual adjustment of the speed setting that could not be precisely duplicated for each test. As a result, speeds listed in Table 2 are target values; actual speeds were determined from the voltage records of the two electronic switches located 15 ft apart on the towing rig. Passing Ship Draft Table 2. Range of model test parameters. Model Scale D = 3.7 in, 1.75 in Water Depth d = 4.1, 4.5, 4.9, 5.5, 8.4, and 14.5 inches Passing Ship Speeds Separation Distances Passing Ship Draft V = 0.8, 1.0, 1.3, 1.5, 1.8, and 2.0 ft/sec S = 1.5, 2, 3, 4, and 5 ft Table 3. Range of test parameters scaled up to full-scale ship 675 ft long with 104 ft beam. Full Scale Assuming Ship Dimensions L = 675 ft B = 104 ft D = 41.6 ft, 19.7 ft Water Depth d = 46, 51, 55, 62, 95, 163 ft Passing Ship Speeds Separation Distances NFESC TR-6056-OCN V = 5.5, 6.9, 8.9, 10.3, 12.4, 13.8 knots S = 202, 270, 405, 540, and 675 ft 11
Page 1 and 2: L I T N AV A L F A C I E N G I N E
Page 3 and 4: INTRODUCTION A series of scale mode
Page 5 and 6: distance (normalized by ship length
Page 7 and 8: Figure 3a. View of towing carriage
Page 9 and 10: Figure 5. Original test frame used
Page 11: Ship Models Figure 7. View of load
Page 15 and 16: Sign Convention The coordinate syst
Page 17 and 18: Interpretation of Figure 10 is aide
Page 19 and 20: fx normalized fy normalized mom (no
Page 21 and 22: Force (lb) or Moment (ft-lb) 0.7000
Page 23 and 24: Some results from Table 5 are prese
Page 25 and 26: CX- CY+ CM- 0.100 0.090 0.080 0.070
Page 27 and 28: FYpred FXpred Mpred 1.000 0.800 0.6
Page 29 and 30: Flory’s equations are somewhat aw
Page 31 and 32: Seelig Method in PASS_MOOR The pred
Page 33 and 34: FXpred FYpred Mpred 0.400 0.300 0.2
Page 35 and 36: Cy - empirical 35.0 30.0 25.0 20.0
Page 37 and 38: Figure 23 indicates that the revise
Page 39 and 40: Appendix A Tabulation of Test Condi
Page 41: 111 4.1 1.75 3.0 1.534 0.042 0.052

Mooring Loads Due to Parallel Passing Ships - State Lands ...

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