calcKristCr.Rd
Calculate the residual resistance coefficient (Cr
)
(dimensionless) using the Kristensen method with Harvald regressions.
calcKristCr( shipType, M, froudeNum, actualDraft, breadth, Cp, tankerBulkCarrierGCargoShipTypes = c("tanker", "general.cargo", "chemical.tanker", "liquified.gas.tanker", "oil.tanker", "other.tanker", "bulk.carrier") )
shipType | Ship type (vector of strings, see |
---|---|
M | Fineness/slenderness coefficient (vector of numericals,
dimensionless) (see |
froudeNum | Froude number (vector of numericals, dimensionless) (see
|
actualDraft | Actual draft (vector of numericals, m) |
breadth | Moulded breadth (vector of numericals, m) |
Cp | Prismatic coefficient (vector of numericals, dimensionless) (see
|
tankerBulkCarrierGCargoShipTypes | Ship types specified in input
|
Cr
(vector of numericals, dimensionless)
Note: Uses Guldhammer Residual Resistance Calculation and adjusts for bulbous bow, and breadth/draft ratio.
This method this requires ship types to be grouped. Use the
tankerBulkCarrierGCargoShipTypes
grouping
parameters to provide these ship type groupings. Any ship types not include
this grouping will be considered as miscellaneous vessels.
Actual draft is typically obtained from sources such as AIS messages or ship records.
Kristensen, H. O. and Lutzen, M. 2013. "Prediction of Resistance and Propulsion Power of Ships."
Kristensen, H. O. "Ship-Desmo-Tool." https://gitlab.gbar.dtu.dk/oceanwave3d/Ship-Desmo
Other Kristensen Calculations:
calcKristCaa()
,
calcKristCa()
,
calcKristPwr()
,
calcKristThrustFactor()
,
calcKristTotalRes()
,
calcKristWakeFrac()
,
calcKristWettedSA()
Other Resistance Calculations:
calcCf()
,
calcHMAppendageRes()
,
calcHMBulbousBowRes()
,
calcHMCa()
,
calcHMImmersedTransomRes()
,
calcHMTotalRes()
,
calcHMWaveMakingRes()
,
calcKristCaa()
,
calcKristCa()
,
calcKristTotalRes()
calcKristCr("bulk.carrier", 5.2, 0.1199268, 12.48, 32.25, 0.81)#> [1] 0.0004176568