DNV Marine Operations' Rules for Subsea Lift Operations
DNV Marine Operations' Rules for Subsea Lift Operations
DNV Marine Operations' Rules for Subsea Lift Operations
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Added Mass Reduction FactorSimplified Method, Splash Zone - Added MassAdded Mass Reduction due to Per<strong>for</strong>ationRecommended reduction:AAAA33 33S3333SAA3333S1.0 0.7 0.3cos (p 5 ) / e10p28if p< 534if 5 < p < 34if 34 < p < 50A 33S = added mass <strong>for</strong> a nonper<strong>for</strong>atedstructure.10.90.80.70.60.50.40.30.20.10Effect of per<strong>for</strong>ation on added mass.e^-P/28BucketKC0.1-H4D-NiMoBucketKC0.6-H4D-NiMoBucketKC1.2-H4D-NiMoBucketKC0.5-H0.5D-NiMoBucketKC1.5-H0.5D-NiMoBucketKC2.5-H0.5D-NiMoBucketKC3.5-H0.5D-NiMoPLET-KC1-4Roof-A0.5-2.5+Hatch20-KCp0.5-1.8Hatch18-KCp0.3-0.8BucketKC0.1BucketKC0.6BucketKC1.2RoofKCp0.1-0.27RoofKCp0.1-0.37<strong>DNV</strong>-CurveMudmat CFDPer<strong>for</strong>ation0 10 20 30 40 50• No reduction applied in added mass when per<strong>for</strong>ation is small. A significant drop in theadded mass <strong>for</strong> larger per<strong>for</strong>ation rates. Reduction factor applicable <strong>for</strong> p
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