Ship Stability _Free Surface Effect (FSE)

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Ship Stability _Free Surface Effect (FSE)

Рет қаралды 116,366

SAILORSTUBE

Күн бұрын

Free Surface Effect. Virtual loss of GM in a slack tank. Concept of GM solid and GM fluid.

Пікірлер: 33

@luisernestomunozmolina1860 2 жыл бұрын

Thanks a lot, its a magnificent explanation about F.S.C and all points involving this condition. Great, thanks for sharing!!!

@hjhjjjjjjjjjful 3 ай бұрын

Great explanation 🙌

@rosspainting9499 8 жыл бұрын

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@DaveCo1985 9 жыл бұрын

Excellent video. Very useful. Thanks!

@aloneicamealoneigo 8 жыл бұрын

AGain, thank you my friend.

@RHAIT100 9 жыл бұрын

Very intersting demo☆☆☆

@navkma 3 жыл бұрын

Thank you so much sir

@TheRealDefacto 7 жыл бұрын

Thanks for the video :-)

@aristongomes5857 Жыл бұрын

Thank u sir

@tygrysisusel 6 жыл бұрын

Magnitude in. the formula should be b^3, sorry for that.

@hasithago 9 жыл бұрын

thanks good explanation

@TheYuganter 6 жыл бұрын

👌👌👍👍

@clifclivanz6526 6 жыл бұрын

Good day i was expecting that you will give the formula off FSM=Gz x (displacement)

@AmericanFightingMan 9 жыл бұрын

Captain Araine?

@yaswanthkumar5798 3 жыл бұрын

Thnq sir

@jomaragosita6518 7 ай бұрын

😅can you give an example of free surface effect of triangular surface.

@tygrysisusel 6 жыл бұрын

Dear friend, so called FSE is in fact transversal moment of inertia of free SURFACE and is not therefore connected in any way with volume of liquid in tank. In other words, it doesn't matter, if you have 1 meter, or 1 mm of free liquid in tank. Effect on GM will be the same. Basic formula of transversal moment of inertia for rectangular tanks is: lxb^4/12. Thus you can see, that there is no units used in the formula and you can see what factor (b^4) is contributing most to the detrimental effect of this phenomenon. I skip over mixing initial stability with GZ curve in view of the FSE. This is bad educational tool for our young officers.

@frontmate 5 жыл бұрын

Why "12" in the formula ?

@lancesather6690 9 ай бұрын

@@frontmateYou don't want to know

@marinersgang Жыл бұрын

small g is the weight of fluid?

@flaptsak87 9 жыл бұрын

How can i calculate the new GM of the ship in a situation like this??Suppose i can find the FSC,can i connect it somehow and find the new GM OF THE vesel?

@sailorstube3259 9 жыл бұрын

flaptsak87 GM (fluid)= GM (solid)- FSC & GM (solid)= KM- KG . We need to find KM and KG. These values are calculated using information from ship stability booklet. You can refer this video to find GM , that is GM (solid).kzfaq.info/get/bejne/prZ0raugztW9nI0.html&lc=z12ldh2hhuulvdcwy04cezhilqyaeh5znx00k

@325nikos 9 жыл бұрын

So the mass of the liquid in the tank has no effect on FSM and FSC?

@sailorstube3259 9 жыл бұрын

As long as there is sufficient liquid free to move across the breadth, there will be free surface effect. For a box shaped tank, if the space occupied ( or mass as mass= volume x density) by liquid is between 5% to 95% (approx ), the free surface effect is almost same and a constant value of FSC ( Free Surface Correction) is taken. However if the liquid filled in a tank is above 95 % ( less space to move), value of FSC reduces and can be neglected . For a triangular shaped tank, this effect is even more than box shaped vessel due to the large shift of center of gravity of liquid.

@325nikos 9 жыл бұрын

SAILORSTUBE thx for the reply