What is the square factor of a ship? How is it calculated?

The square coefficient is the ratio of the volume of the cuboid represented by the product of the length of the ship below the waterline plane parallel to the base plane and the product of the corresponding length, width and average draft.

The calculation formula is: where.

displacement, t; l

waterline length, m; γ

density of water, t m3; b——

Beam, m; t – draft, m.

It is one of the important ship type parameters for the design and analysis of ship performance, and is an important data to express the fat and thinness of the underwater shape of the ship, which is calculated by the calculation of the ship's buoyancy, rapidity, seaworthiness, comprehensive economy and general arrangement.

Extended Materials. Ship coefficients.

1. Volume coefficient.

1) Square coefficient - indicates the total degree of fat and thinness of the underwater part.

2) Prismatic coefficient - reflects the distribution of the volume of the underwater part of the hull along the length of the ship.

3) Vertical prism coefficient - indicates the distribution of the drainage volume of the underwater part along the draft direction.

2. Area coefficient.

1) Waterline surface coefficient - reflects the thinness of both ends of the design waterline surface.

2) Mid-cross profile coefficient - reflects the fullness of the mid-cross section.

The square factor is the ratio of the volume of the type displacement under the waterline to the volume of the box, represented by the product of the length, width, and draft corresponding to the waterline.

If you don't take into account the difference in density between seawater and freshwater, the square factor is.

Displacement (waterline length * width * draft).

The square coefficient is an important data to express the fat and lean degree of the ship's underwater shape. When the ship pool test, it is generally necessary to ensure that the square coefficient of the model and the parent ship are the same.

The square coefficient is a coefficient that reflects the degree of fat and thinness of the underwater part of the hull, which is the link between the displacement and the main scales.

The displacement of a ship refers to the volume of water that a floating ship repels in the water, and the weight of this water is also equal to the weight of the ship itself. The formula for calculating the displacement of a ship is as follows:

Ship displacement (tonnes) = length m Width m Ship draught m Factor divided by seawater) or 1 (fresh water) (cubic meters).

The displacement can be used to calculate the deadweight tonnage of the ship; When building a ship, the weight of the ship can be known according to the displacement tonnage; When the ship floats on the water, the weight of the water is the structural weight of the ship itself, which is the same volume as the part below the surface of the boat. It is usually said that the displacement of a ship is 10,000 tons, which means that the weight of the ship is 10,000 tons, and the weight of the water discharged by the ship floating on the water is also 10,000 tons.

However, if the ship is flattened, the original cabin and other spaces on the ship are removed, and it becomes a solid iron block, even if it weighs 10,000 tons, it is impossible to discharge 10,000 tons of water, that is, without the buoyancy effect of 10,000 tons of water on the ship, so such a 10,000 tons of iron will immediately sink into the water. If God pushes a 100,000-ton boat a few meters under the water with his mighty hand, because the draft of the boat increases, the amount of water discharged by the boat increases, and the buoyancy of the water on the ship also increases, and the weight of the ship does not change, so the buoyancy is greater than the weight, and God takes it away, and the increased buoyancy will push the boat back to the original draft of the boat, and continue to keep the buoyancy equal to the balance of the weight of the boat.

Waterline: When a ship is loaded with cargo, it has a different draught (the depth at which it is immersed in water) than when it is empty. There is a danger when there is too much cargo, so in order to know the level of draft of the cargo being loaded, it is usually indicated by a waterline sign on the side of the ship.

Displacement: The weight of the water discharged by the boat when it floats on the water, 1 cubic meter of fresh water is one ton, which is calculated.

There are 3 types of displacement.

1.Net displacement tonnage

Refers to the weight of the ship when it is fully equipped. Cargo is not included. Fuel oil. Personnel. drinking water, etc.

2.gross displacement tonnage

for the full load weight of the ship. Including goods. Fuel oil. Personnel. drinking water, etc.

3.deadweight or burden cargo tonnage

Equal to total displacement tonnage minus net displacement tonnage, is at full load. The goods that can be shipped. Oil, water, and other weights.

The displacement does not affect the purpose of the ship, it can only affect the size of the cargo capacity, and the real impact on the use is the shape and hull structure of the ship. Because the ship is afloat in the water, the mass of the ship is equal to the mass of the drained water, and the mass of the ship is measured kg, divided by the density of the water 1000 kg m3, that is, the volume of the drained water m3

Displacement: 30*6*

Ship pei orange weight: 1000 * 126 = 126000 kg = 126 tons.

I don't know what you mean by square coefficient.

You just have to consider that the weight of the ship is equal to the weight of the rock and water, which is the theorem of buoyancy in physics.