Using KN Curves to construct a GZ curve - Advanced ship stability for mariners
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- Опубликовано: 8 сен 2024
- This video uses a numerical example to explain the procedure of constructing a GZ curve using data from KN curves. Why KN curves are used and their distinct advantage over the cross curves of stability is also explained.
This is video 28 in the series of videos on ship stability.
Students are advised to watch the previous videos (links below) before watching this video.
1) Ship Stability (Volume, Mass, and Density): • Ship stability basics ...
2) Ship Stability (Pressure and Thrust): • Ship Stability Basics ...
3) Ship Stability (Displacement and Under-water volume): • Ship Stability - Displ...
4) Ship Stability (Deadweight, TPC, and Reserve Buoyancy): • Ship Stability - Dead...
5) Ship Stability (Load lines, effect of density on draft and displacement): • Ship Stability - Load ...
6) Ship Stability (Shift in the centre of gravity and KG calculation): • Ship Stability - Shif...
7) Ship Stability (Centre of Buoyancy): • Ship Stability - Cente...
8) Transverse statical stability of ships: • Transverse statical st...
9) Equilibrium of ships and Angle of Loll: • Ship Stability - Equil...
10) Calculate free surface correction on ships: • Ship Stability - Calcu...
11) Calculation and correction of ship’s list: • Ship Stability - Calcu...
12) Extra questions on ship’s list calculation and correction: • Ship Stability - Extra...
13) Hydrostatic tables (Part 1): • Ship stability - The u...
14) Hydrostatic tables (Part 2): • Ship Stability - The ...
15) Hydrostatic draft: • Ship Stability - Calcu...
16) KM and BM calculation: • Ship stability for Mat...
17) KM curves drawing and calculation: • Ship Stability for Mat...
18) Simpson’s First Rule: • Advanced Ship Stabilit...
19) Simpson’s Second Rule: • Ship Stability - Simps...
20) Combination of Simpson’s First and Second Rule: • Ship Stability - Combi...
21) Simpson’s Third Rule: • Ship Stability - Use o...
22) Calculate volume using Simpson’s Rules: • Using Simpson's Rules ...
23) Fresh water allowance: • Fresh water allowance ...
24) Angle of Loll: • Angle of Loll calculat...
25) Calculate centroid using Simpson’s Rules: • Using Simpson's Rules ...
26) Curve of Statical Stability: • Curve of Statical Stab...
27) Cross Curves of Statical Stability: • Cross Curves of Static...
Well done, thanks !
Thank you very much, Sir.
What I liked the most is your way of explaining. It's quite calm & steady.
Nice explanation
Thanks
Sir pls send some video for ship handling and radar lecture pls
Sir regulations for statical stability of curve please cover
Sir can u tell me why u took angle of heel 57.3 to calculate initial GZ?
To find out the initial GM (metacentric height) of the ship from the GZ curve, we need to find the angle of heel at which the righting moment is maximum (i.e., the point of maximum GZ). This angle is usually denoted as the "angle of vanishing stability" or AVS.
However, the GZ curve is usually plotted in radians rather than degrees. To convert the AVS from radians to degrees, we need to multiply it by 180/π, which gives us approximately 57.3 degrees. Therefore, we take 57.3 degrees in the GZ curve to find out the initial GM because this is the conversion factor that allows us to convert the AVS from radians to degrees👍👍
You lost me at KG x Sin(-0), i can't figure out how you get your GZ result.
(assumed kg - actual kg) sin angle = correction to apply to gz from chart