Holtrop, J. An approximate power prediction method. Readers are reminded that copyright subsists in this extract and the work from which it was taken. Except as provided for by the terms of a rightsholder's licence or copyright law, no further copying, storage or distribution is permitted without the consent of the copyright holder.
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With this method a resistance approximation is made for the displacement condition. The approximation is based on Dr. The parameters should be within the following limits:. This methode makes an estimation of the resistance of a vessel according to G.
The method is based on Dr. Sander M. This method can be used to approximate the resistance of a barge. The prediction is valid for deep and calm water, and has the following applicability:. With this method you can calculate the resistance of a vessel in the area between displacement and planing condition. The calculations are according to the method as published in J.
The method has the following area of applicability:. With this method you can calculate the resistance of a planing hull.
The method is based on the following two publications:. For the resistance calculations all forces are assumed to go through the centre of gravity of the vessel. For calculations in the preliminary design stage this is assumed to be sufficiently accurate. The output shows two values for the resistance:. With this method the resistance of a planing vessel can be calculated. The following limits for the parameters have to be taken into account:.
The method is based on J. Keuning, J. Gerritsma and P. The following parameter limits have to be taken into account:. In this window all ship's parameters which are applicable for a certain method should be given. In the list below all existing parameters are included, however, in reality only those relevant for a particular method are shown. The definition of all parameters is strictly according to the convention of the applied resistance prediction method, which does not have to agree with the PIAS convention.
Below, some guidance on these conventions is given, nevertheless it is recommended to keep the source publications at hand for the details. For the parameters as given at the first menu option, here the resistance approximation is made, and the results are printed in a table. The input data as well as the calculated resistance is sent to the propeller calculation module Prop. See Local cloud: simultaneous multi-module operation on the same project. With this option design version can be managed, with a mechanism as described in Data storage and backups.
Resist: resistance prediction with empirical methods. With this module resistance predictions can be made for different ship types, with nine published empirical methods, viz: Hollenbach, for displacement vessels. Van Oortmerssen, for smaller displacement vessels. MARIN for barges. Savitsky, for planing chine vessels. Robinson, for planing chine and round bilge vessels. Hollenbach limits of applicability. Holtrop and Mennen.
Hard chine regression data boundary. Hard bilge regression data boundary. Resistance prediction 1. Input data resistance prediction 2. Calculate and print 3. Diagram of resistance components 4. Calculate and send to Prop 6. Local cloud monitor 7. File and backup management. Definition of lengths for the Hollenbach method. Definition length for the Oortmerssen method. Definitions for the Barge method.
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