The sea is rushing, why don't the boat turn over or shake?The ship has a mystery

The weather on the sea is like a child's face, which is unpredictable, so why not turn the ship sailing on the sea?

Of course, the situation of turning over the ship also exists, but this is a small probability event. In most cases, the ships will not overwhelm the wind and waves, otherwise no one will dare to take the boat. If we pay attention to observing some small vessels, we will find that they will always shake to left and right with the fluctuations of the seawater, sometimes shaking big, sometimes small, but whether it is shaking or small, they can finally return to correction again. , And it won't overwhelm, why is this so? The mystery must be found on the hull. Any two objects with quality have mutual gravitational effects. For all things that exist on the earth, they are subject to gravitational effects from the earth and point to the center of the earth.

The gravity of the gravity of an object is acting on each point on this object, and the combination of the gravity of each point is the weight of this object. It is the "center of gravity" of objects.

Any object has a center of gravity, regardless of whether its shape is regular, and the center of gravity of the object may not necessarily be above the object. Obviously, it is obvious that the ship is a relatively regular shape, so the center of gravity of a ship is probably located in the center of this ship. Because even if the "Ocean Ocean" giant cruise of the "Ocean Ocean" with a height is 64 meters, its focus is still on the center of the hull. Because even if the hull is high, the heaviest part of a ship is still at the bottom of the ship.

Gravity pulled the ship down, but the ship did not sink into the water. Why?

Because there is a force against gravity, it is buoyancy and buoyancy of seawater. The buoyancy is vertically upward, and it is the opposite of the direction of gravity, but the difference is that gravity acts on the entire hull, and the buoyancy is part of the hull part that does not enter the seawater. Therefore, we often say that the drainage volume of an object's drainage volume The larger, the larger the buoyancy it suffers. There is one thing that is similar to gravity, that is, it also acts on every point that does not enter the hull in the water, so the buoyancy of each point will converge on one point. This point is called It is "floating heart". For a vessels that sail smoothly on the water, the position of the heart is located under the center of gravity, and the two are located on the same straight line perpendicular to the water.

It is precisely because the heart is located under the center of gravity that the ship can float on the water.

However, it is impossible for ships to sail smoothly forever, and in fact, every moment the ship is shaking every moment. When a ship tilted to the right because of the waves on the sea surface, the center of gravity of the ship does not change, because as long as the volume and shape of the object does not change, the center of gravity will not change. But the heart is different. When the hull is tilted to the right, the drainage volume on the right will be greater than the left, and the buoyancy is the hull that acts on the drainage part, so the floating heart will move to the right at this time. The center of gravity and the heart is not on a straight line perpendicular to sleep, so the strength of these two directions will produce a torque and twist the hull from the state to the right.

The nostalgic hull will start tilting to the left because of overkill, so the same story staged again. The focus of gravity and the concentration of the heart once again raised the hull from the left to the left. It is called "Righteous Torch".

So under the influence of Zhengli Torque, the ship shakes left and right, but it does not turn over. Although the boat does not overwhelm it, it is always left -handed and right. It is okay to say that if it is a large cruise ship, the goods on it are not all shaking into the sea, and the items in the cabin are not all broken. Therefore, in order to allow the ship to always sail smoothly without shaking, people have installed a part called "Castric keel" on both sides of the ship. This thing is basically available whether it is a large ship or a small boat.

When the hull shakes, the two sides of the ravioli will produce turbulence that is opposite to the direction of shaking, so as to effectively reduce the shaking amplitude of the hull.

However, for large cruise ships, it is not enough to rely on cymbal keels. They also have a component -like part of the fins. This part is called "reduction fin". The shake fin can be considered to control the activity, which can slow down the trend of the shaking of the ship in a targeted manner. For the ship, this is a tall configuration, so the boat must not have it. If there is a keel and a reduction of shaking fins, the shaking of the ship is still not satisfactory. There is also a way. You can install the water tank inside the hull. The force opposite to the direction of shaking, thereby playing the goal of smooth hull.

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