DELFTSHIP MANUAL PDF

Your basket is currently empty. DELFTship: Visual hull modelling and stability analysis Designed from the ground up using state-of-the-art technologies, DELFTship allows you to derive all data needed for calculations from the model itself. This guarantees data consistency between all elements and extensions. Work smarter, faster and with user-driven software built on years of product development in real-life environments - all based on TU Delft research.

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Program related preferences are located on the Settings tab while project settings can be found on the Home tab. Poject settings are saved with the model.

In the project settings window you can modify various settings specific to the currently open project. Its content depends largely on the installed extensions. General The first tab page is used to enter general project information such as: Pr o ject na me o r d es cr ip tio n Na me o f the d es ig ner Pr o ject co mment. This can be any brief descriptive text for your design.

This can either be imperial or metric units. When changing the unit format the entire model will be scaled to the new format. When switching from meters to feet for example all dimensions are divided by 0. The s ha d e und er wa ter Defines the color used to render submerged surface areas of the model. Rotates wide images 90 degrees so these images better fit to the page. Main particulars The tab sheet to enter the main particulars contains the following fields: Leng th - The project length is used to calculate the vessels trim, see definition but also in the hydrostatic calculations to determine coefficients such as the block coefficient.

The project length can have various interpretations and therefore has to be specified manually. For ships the project length generally corresponds to the length between the perpendiculars. For boats and yachts most often the length at the waterline is used. Bea m - For boats and yachts the beam is measured to the outside of the shell plating, for merchant ships one uses the moulded beam. The moulded beam is measured to the inside of the shell plating.

When the moulded beam is used the extra volume of the shell can be accounted for in the hydrostatic calculations by entering the mean shell thickness. Just as for the beam a distinction can be made between the moulded draft and the draft above the bottom of the keel draft BoK.

The draft BoK is obtained by adding the shell thickness of the bottom to the moulded draft. The thickness of the bottom is also referred to as the keel plate thickness. M id -s hip lo ca tio n - The default location of the mid-ship is halfway the aft and the forward perpendicular. The location can be changed by unchecking the " Default at 0.

Heig ht b a s e p la ne - Reserved for future use. The location of the forward perpendicular is found by adding the project length. Reserved for future use. Lo ng itud ina l r efer ence p o int - Occasionally the hydrostatic and tank calculations use a different longitudinal datum or reference point. Dr a ft ma r ks - The grid at the bottom is used to define draft marks.

Draft marks are usually welded and painted onto the hull on various locations. Draft marks have the following properties: Des cr ip tio n - The description of a draft mark, for example " Aft mark " or " Transom mark ".

Lo ca tio n - The longitudinal location of the draft mark along the hull, measured from the longitudinal reference point, generally the aft perpendicular. Us e - Switch to enable or disable a draft mark.

A disabled draft mark is ignored by the program. Vis ib le - If enabled the draft mark will be rendered on the hull. Symmetr ic - Draft marks are normally symmetrical, that is they are visible on both sides of the hull. If this property is disabled the draft mark will be forced to the center line, which can be used to pace a mark on the center of the transom. Heig ht keel a b o ve b a s e - Intended for ships with a design trim, such as small fishing vessels.

The height of the keel above the base is the distance from the keel line to the base line which can be positive or negative. Positive values are encountered when the keel line is located above the base plane.

This distance is subtracted from the moulded draft before the keel plate thickness is added. K eel p la te thicknes s - The thickness of the bottom plating at the selected location. This thickness is added to the moulded draft to obtain the actual draft. The relative density of sea water for example is 1. Shell thicknes s - Commercial vessels are usually modeled to the inside of the shell plating. The mean shell thickness is multiplied with the wetted surface area to calculate the submerged volume of the shell, which is added to the moulded volume to calculate the total displaced volume.

Ap p end a g e co efficient - This is a multiplication factor commonly used to compensate for appendages of the vessel which not have been modeled but contribute to the displacement, such as a rudder or propeller. The default value for the appendage coefficient is 1. The default value to compensate for rudder and propeller is ranges from 1. Co efficients b a s ed o n - Hydrostatic coefficients such as the block coefficient and prismatic coefficient can be calculated according to two different methods.

The first is by using the dimensions for length and beam as specified on the project page, which is the preferred way for large ships. The second method uses the actual length and beam of the submerged body. This method is more appropriate for yachts and small boats. If the second method is selected, the submerged length and beam will vary with the draft. The program cannot verify if the specified length and beam are correct.

If incorrect values have been specified on the main dimensions tab page, the calculated coefficients mentioned above will also be incorrect!

Dis a b le s ur fa ce check - Each time hydrostatic properties need to be calculated, the program checks if the direction of the surface normals of faces is consistent, correcting the direction if necessary. In some rare cases it is possible that the surface normals point in the wrong direction once this check has completed. In that case the hydrostatic values will be incorrect, even to the point of negative volume and displacement. If this happens it is recommended to first disable the automatic surface check and then to manually correct the surface normals by inverting the corresponding faces.

When in doubt, always visually check the direction of surface normals by selecting one or more control faces. It is important to realize that the program fails to calculate hydrostatic properties if one or more leak points become submerged. See also the paragraph on leak points. Dis p la y hyd r o s ta tic fea tur es - allows to enable or disable the real time display of certain hydrostatic properties of the model 2.

The actual appearance of this window differs depending on which extensions are installed with the main program: generally each extension has its own tab page. Please note that the professional edition has significantly more options and properties than the free edition.

Always available are: General Modify various general settings of the program, such as: Reopen last used project on startup - Loads the project which was open the last time the program was shut down. The language used by the program. A special tool is available from www.

Automatic Updates - controls the frequency with which DELFTship checks for updates Maximum size of undo memory Automatically hide viewport buttons Control point size - larger points are easier to select Viewport background mode - select a gradient or solid color as a background Viewport background color.

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delftship manual

Now, boys and girls, I would like you to work on the remainder of the bow to make it look about right. Now we need to temporarily remove some of this information to make the screens easier to work with. I printed these out, then used a pantograph to enlarge to the size I want. Select the three control points shown: Now select the edges as shown in yellow, and click edit, edge, crease to get: Select the five points shown and give them a z value of 2. You should have something similar to this: You should have this: This looks wrong because we have extruded every point equally, despite the curve of the deck. Was it these you printed out in the making of your X Bow. Without changing anything else, now go to edit, edge, insert to create extra control edges: No doubt you will have seen the little pop up box shown above.

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Manual Delft Ship

Program related preferences are located on the Settings tab while project settings can be found on the Home tab. Poject settings are saved with the model. In the project settings window you can modify various settings specific to the currently open project. Its content depends largely on the installed extensions. General The first tab page is used to enter general project information such as: Pr o ject na me o r d es cr ip tio n Na me o f the d es ig ner Pr o ject co mment.

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