Location: Bangladesh Tanks and Compartments by Using Maxsurf How to create tanks and compartments by using maxsurf after creating a model. Location: Spain You have to fill the boxes indicating the limits of each tank. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals.
I got some difficulty here.Hope that someone who expert in Hullspeed or wave pattern could help me explain my problem.
As you can see in the pictures attached below, that were the wave pattern produced by my boat at different speed. 1) what is the standard explanation to show the different between each wave pattern (other than explain about wave produce at critical, subcritical, supercritical speed).
Location: Norway Is it possible to import an IGES hull file into Maxsurf and from Hullspeed get the wave pattern from the actual hull? Other input data is Speed range, Method of calculating , Overall efficiency and also need to set units.
IGES is probably the most convenient format in which to transfer a model from Freeship to most surface-based modellers.
Freeship, and the pro versions of Delftship, can export IGES surfaces that most 3D CAD programs can import and use. Location: france,europe Not very easy, because they do not use the same mathematical surface representation. Location: Australia Just tested Freeship to Maxsurf with the FS tug sample and it seems to go through fine via IGES. Location: Australia Even if you transfer via iges you wont have the control point net in Maxsurf to do any further work. Location: Australia No, actually via IGES you do get the full surface and its control point net which can then be modified in the normal way. I did an iges export of thier 2nd demo file and it said 278 surfaces exported so I expect that while MS would import all of them, the model would be a nightmare to work with and modify.
You have tried to help Alex, but your experience was unsuccessful - your model on Maxsurf has no keel, deck and transom. As against you I have had time to make good model and Alex have already thanked to me with the letter. I wrote to him that all this should be determined with calculation, then to pick criteria about an intact and damage stability so that were fulfilled the requirements simultaneously on LR and ISO and to make calculation on Maxsurf Stability. Thanks for advisories and kind wishes, but I insist that you knew, that I was not worse than you or what - be other ship-building expert, writing in the forum, is familiar with the International code about an intact stability of vessels. From just now published image it is visible, that the lower edge of ventilation cut-outs is almost on equal levels from the upper edge of the door-coaming for the superstructure. As the door is near to CL, follows that for the offset it is necessary to take more dangerous event at which water will penetrate in the hull, that is the most removed from CL point of the lower edge of air vent, Y = ± 1,55m. For rough, approximate calculation of an intact stability for the most reference event of loads - Full Displacement, these criteria are quite sufficient.
In program Delftship Pro as well in Maxsurf Stability, the wind pressure which has maximum value 504Pa for unlimited navigation area is accepted only. But if we want to make calculations of an intact stability on ISO 12217-1 or approximately at program Orca3D then it is necessary to use wind velocity Vw. At last I too have advisory to you - only one: Dear Tansl, before could declare that what - be calculation is erratic, you should prove it with calculations! Obviously that Tansl any more have not remained other arguments, but he does not want to recognize that has written not quite considered text.
Calculation on stability criteria on Maxsurf Stability it is possible to see in the added file. I has tested at so chosen stability criteria how much can to be the maximum allowable value VCG for full displacement.
It has appeared that at VCGmax=1,75m the ship will not meet the requirements any more criterion of weather.
Is there another way I can recreate a maxsurf model of the hull, I have attached the images that i have of the boat. Location: Spain With this information you can make a similar model but that surely will not equal the existing boat. My program allows, unlike Maxsurf, get easily and exactly the desired boat but must be available at least six cross sections, along the longitudinal profile and main deck. I have made some rough sections in Auto-CAD, however I have had no luck trying to construct these into a maxsurf model, would these be of use to your method? If professional advices how to prolong work are necessary for you or that to find out, write in the forum or on my e-mail address which you will see in my profile on site Linkedin.
Calculations of resistance and power show that 2 х750= 1500hp quite sufficient for achievement of a top speed 27kts. Wholeheartedly gratitude and that which understand, but for different reasons do not write in the forum.

Location: Bulgaria Likely there will be a question - what for in the ultimate view there are so many surfaces? Full Displacement is necessary to be no more 27t, differently it is impossible to receive the service speed 25-26 kts. Well projected vessel in displacement position on a still water before to glide, it is necessary to be on an even keel, that is mean LCG=LCB. Location: Spain I am convinced that you are able to understand the dates of the various threads, although they are in English. For the bar stem there is a hump, and in the position of joint with the keel there is a hogging.
There can be you have found the good prototype with very close ship dimensions and for this purpose expect T=2,2m.
But if it no and the draft of the full vessel is still unknown then to have to arrange not less than 4-5 prototypes which to you should be compared for an estimation of the loads and accordingly the draft of the light and full vessel.
Location: Spain Do you really think Savitsky method is applicable to this ship ?.
We are going to see, for the first time in the history of mankind, a fishing boat of this type operating in planing mode.
Hardly the author of the project wants the vessel was slid slowly as itself has picked a gliding hull form!
As is known from the planing theory if the vessel have speed relevant Volumetric Frude number Fnv=from 1 to 3 then we have a transient regime of movement, and at Fnv => 3 then we have a mode of pure gliding. Whether this version the stationary engine with such power is possible to install on wood vessel? But as I have said for the first time, we shall better keep the author himself to decide the problems!
I repeated the calculations and now kmt is not negativeAs you said there is some problems in the model probably on the skeg. Band covering keel from above should be removed, because calculations on hydrostatics display untrue outcome - without the cubage of volume of keel.
Before to begin correction of the side in Rhinoceros 5 it is necessary to save Deck line in the fore.
I want to explain you too and how the internal constructions influence calculations on hydrostatics. I have tested it on my back in an extent some sleepless nights until then while have understood where I am mistaken. If in the model there are traced internal constructions, for example: double bottom, lower deck, longitudinal and transverse bulkheads and so on, on hydrostatics or is impossible to make calculations or false. It is received from for that programs for making the mathematical model of the outboard shell of the vessel demand as compulsory condition of the normal to the created surfaces had directions from the inner side of the vessel out to water, i.e.
Everything else if it is traced, it is necessary to put in separate layers which should be frozen at calculations on hydrostatics, intact stability and unsinkability. It will be better if the file inclusive only shell plating, deck and transom, to save separately, and internal constructions to inscribe in other file.
Even when you work with Maxsurf Stability there is no necessity to draw internal constructions.
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Location: Switzerland How to thick a hull designed with Maxsurf Hi everybody ! In order to give to the constructor some clean and correct plans, I need to give to my 3D surface (which is the hull) a given thickness. My problem is that Solidworks cannot thick the surface because of the partly chined hull of the sailboat (disappearing chine). I realy need to have this thickened hull in order to design correctly the inside sections, which can potentially be cutted by CNC.
Location: Spain If you will work only with the inner surfaces of the hull, you will not need to give any thickness to hull to define the internal parts.
Location: Hampshire UK Surprised SolidWorks will not 'join' the surface, maybe it is not one clean surface? To have a disappearing chine, I have to design the half hull in Maxsurf with two different surfaces. In this way, the IGES exported surface is far better accepted by Solidworks, which is now able to thick it ! Location: MI I have worked in CAD since 86 Mostly turbochargers and engine design.
Hope this helps turbo2256b View Public Profile View turbo2256b's Gallery Find all posts by turbo2256b « maxsurf - how to save parts to library???? Each of the Project's undertaken by SongLine Yachts over these many years, represents an evolutionary step in the objectives of our company.

This term is relative and left open for intrupretation, but each and every person associated with our group, takes great pride, yes recalls a great amount of stress, is each and every project we have moved to completion.
But freeship will first translate its subdivision surface into a bunch of small NURB surface that will approximate the subdivision surface. It is not necessary to confuse an initial trim of a dead ship in the water to a running trim angle when the fore is lifted from for the elevating force on the bottom. On my calculations it is on Z ≈ 2,6m from adopted by me BL which is on 0,705m from the lowermost point of keel. But GMt must be to correct for effect of free surfaces of a liquid load on an intact stability. You need to work a little about it if you want to improve but it is more than enough, imo, for previous calculations.
I see that in the forum already there are people understanding those that I make, how I was to make it and in first-order for what . Because the model is made on program Delftship Professional and import with IGES file in Maxsurf Modeler and in the other program. If you will select on Maxsurf Modeler from Data\ Coefficients\Draft for Coefficients\Draft to Baseline menu then the keel does not enter in calculation Cb and value about 0,437 for draft T = 0,9m is received . In that case it is possible to accept LCG=5,717m from the beginning of the coordinate system. Therefore, I have no doubt that your purpose can not be to help Alex, who made his inquiry over 2 months ago. The top of the side at the bar stem has corrected by importing your file from Maxsurf in Rhino 5. Except for that is exact in this zone there is a dark spot in the shell plating which is meant with a cavity. Find attached the model a screenshot of how a skeg can be created without trimming by using Maxsurf's inbuilt ability to close the boundaries. Rabah How did you correct the bow cone problem in rhino?For your last post I think the difference with orca3d is due to the different analitical approach of the programs. The information for the walls of tanks and for the bulkheads of cargo tanks is included into the general table, and location of the transversal watertight bulkheads enters in the program as an additional information, without necessity of their visualization. In more details, the chine has a (very little) radius which tends become smaller on the inside part of the thickened hull. You will get in Maxsurf (or rhino) a bunch of surfaces with a bunch of control points, even if you have a simple surface with few control points in Freeship. That is mean the ballast in the keel sinks CG of the ship for deduction of a good intact stability at 5 metric waves. I think what you intend is to show us your homework so that we express our opinion on them. For this purpose when it is necessary to calculate hydrostatics, to suffice only the surface ensuring tightness - bottom, side, deck and transom. This limit between those two surfaces can be a sharp edge or not depending on the tangency of the two surfaces. But I have decided to not do them because still it will be not known what engines and propellers for new ship. Better off using surfaces ppast the intersection edge offset them thickness required then trim to desired intersection edge then fillet inside and outside edge.
From the lower point of the keel this distance will be 2,105m as it is specified in Planing Analysis Report. There is a sense in their installation only if will be is support of a deck, but I do not see a deck above them. Please do not go into the details of the model because its just a rough model and not meant for any project. And it is possible to change the shaft angle and to construct the propeller with smaller dia but with major disk relation, with major vanes and other pitch ratio. I hope what is it will not be to you irritate, but you know that it is impossible to find two people equal on taste. Could, in any case, calculate the position of the g c for the equilibrium position has a zero trim. The door of the superstructure, depending on the regulatory coaming, may be more appropriate. Study of wind and waves (weather criterion):The wind force must be calculated using a specific formula.

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