Design of a small river push boat with Orca3D Hull Assistant

[Razmik Baharyan]

Design of a small river push boat with Orca3D Hull Assistant
/To definition for a degree design of a push boat for Brazilian rivers Tiete - Parana /

1.     It is improved project ship dimensions:
Loa = 18,5m; B = 9,0m; T = 2,0m; Hmean = 3,0m; Hfore perp = 3,5m;
Displacement D = 204,64t; Zg = 2,4m; Xg = 8,411m from bow transom
2.    With Rhinoceros and Orca3D Hull Assistant / Ship Assistant it is made the desired stern and the bow contours of the push boat /see attachment files “Aft bottom and side plating” and “Fore bottom and side plating”/. The method of deriving of the stern and the bow contours is very interesting and likely is pleasant too much of admirers Orca3D:
а.With Ship Assistant I have made the whole hull but with height 2,1m /a little bit more the draft/ paying exclusive attention to the stern contours. Then I have excised the bilge and the fore part. So has received <.3dm> file only for the bottom and the sides in the stern.
b. Too with Ship Assistant up to height 2,1m I have made the second model again the whole hull, but this time the stern contours I have carried out such what I have decided to accept in the fore part. I have excised the bilge and the fore part. The received stern christened with new name "Fore part".
3.     The further construction of the model is already easy:
a. Up to height 2,1m I have made the whole hull integrating received the stern and the fore part and I have added a flat bilge.
b.    I have lifted the level of the deck up to 3 m
c.    I have increased height in the bow up to 3,5 m
d.    I have made the Main deck, the bow and the aft transom
e.     I have added in the stern outboard keel - stabilizing skeg  /see attachment files “half hull” and "hull"/
4.     All account which can then follow will be carried out with Orca3D.
5.     As in program Orca3D still not included criteria about an intact stability, whether and I wanted to test fulfils the push boat of stability criteria at floating in the river, further I have prolonged on the following method:
a. Make Export present Orca3D model and it is noted as IGES file.
b. Make Import IGES file in the program Delftship Pro
c. Liquidate Leak points to receive the message “Model is OK”
d. Then I test the intact stability of the push boat in the system of the rivers Rhein - Main - Danube which on height of waves, pressure and a wind velocity differ from Brazilian a little. Except for that in the program the wind pressure included 40 kg/m2 that mean availability of a high reserve.
e. I have received the file in which sufficing all stability criteria in the river is visible but from for sizable it is impossible to publish in Orca3D Forum in the complete size.
Designer: Razmik Baharyan

[Razmik Baharyan]

Another attachment files-continue

[Razmik Baharyan]

Design of a small river push boat with Orca3D Hull Assistant
Second variant

1.  The Second variant forming of the model of the push boat begins as well as first - with Orca3D Hull Assistant/Ship Assistant we make the stern and the bow contours of the push boat in two separate files.
2.    We make Export these files from Rhinoceros and note as IGES files.
3.    We make Import the two IGES files in one file on Delftship Pro.
4.    We add new surfaces for the cylindrical part and connected with the stern and the bow so that to receive length Loa. We add the flat bilge.
5.    We increment the depth - up to levels 3m in the horizontal part and 3,5 m on the bow transom.
6.    We add the deck, the bow transom and the stern transom.
7.    The outboard keel - stabilizing skeg is added.
8.    We test the model and if it is necessary liquidated all Leak Points.
9.    We make silhouette of the push boat.
10. We make all necessary accounts on Delftship Pro including check on the intact stability.
11. If we want to compare the Righting lever curve and the accounts on hydrostatics of two programs Delftship Pro and Orca3D it is necessary to make the following:
Export the file of the model from Delftship Pro, note it as IGES file and after Import in the new file on Rhinoceros we receive model, which absolutely equal in two programs.
12. At last it is necessary to mean the following different:
In program Orca3D there is no additive coefficient for appendages/projecting parts/, and in Delftship Pro he is 1,005 up to 1,01. Higher sizes up to 1,02 are more often also.
For that it is necessary to compare outcomes of the two programs not only at the equal draft, but also at the equal volume of displacement /theoretical disregarding appendages/. It means that in Delftship Pro it is necessary to accept Appendage coefficient 1,00 to compare to outcomes on Orca3D. Accounts show that at T = 2,0m and V = 202,62m3 there is an absolute coincidence of dates.
Actually on Delftship Pro at Appendage coefficient accepted by average 1,01 weight displacement is received 204,64t at draft T = 2,0m.
    Designer: Razmik Baharyan

[Razmik Baharyan]

Another attachment files

[Razmik Baharyan]

Another attachment file

[ross]

Good this is what I need for my project. Thanks guys..