Why do trains need to travel on railroad tracks? The train is heavy, but the car is not light, right

First of all, the train has a large dead weight. Generally, the weight of a passenger car is about 1300t. The load is only a few hundred tons.

Moreover, it can be told that two rails form a line, and the width of the rails is the same as the width of the two wheels of the carriage before. So you can also call the train a horse-drawn carriage, or a steel dragon.

Secondly, the wheels of the train are iron, and if you want to run smoothly at high speed, you can't use the concrete floor, because the cement floor is still very rough and easy to break, and the asphalt floor is not hard enough. Unable to carry the entire train. Therefore, it is necessary to rely on materials that can bear loads and have sufficient hardness and toughness to make road surfaces.

And these are the properties of steel. So the train has to run on steel rails. But rails alone are not enough.

The ground is soft, and even if the rails can bear the weight of the train, the ground can't because the ground has to bear the combined weight of the train and the rails. So that's why the rails have to be laid on a trapezoidal roadbed. If you pay attention, the cross-section of the railway subgrade is trapezoidal (also on bridges), with steel rails on top, then sleepers (now all cement sleepers), and gravel underneath the sleepers to disperse the forces.

Under the gravel is a hard ground that has been pressed many times with a rolling machine, and you can use soil or the kind of black soil used in the highway subgrade. If they weren't built in this way, the rails would have sunk into the dirt because they couldn't bear the weight of the train.

It's right to drive on rails, but not rails.

Kinjing inquiry; Because the rails can provide the stability and directionality that trains need to travel. The rails ensure that the train remains stable during the journey, and will not sway from side to side or deviate from the track. At the same time, the rails can also guide the direction of the train and prevent the train from deviating from the track.

If the train travels on the tracks, it can reduce the friction and resistance to the ground, and improve the efficiency and speed of the train. In addition, the rails can also withstand the heavy field capacity and power of the train, ensuring the safety and reliability of the train. Therefore, the rails are the best choice for train travel.

Summary. Thank you for your patience and have helped you find the result: the reason why the train runs on the tracks is because the train usually pulls some passengers and heavy goods, etc., and the body and wheels of the train are made of steel, resulting in each carriage being very heavy.

If the train runs directly on the road, then it will inevitably lead to the situation where the road will be crushed. This problem can be avoided by using some tracks, which can reduce the pressure on the ground a lot. Another reason is that laying rails can reduce the friction between the train and the ground, because the fast movement of the train can form a relatively weak friction on the smooth track, which is conducive to increasing the speed of the train.

Thank you for your patience, I have helped you to check the results: the reason why the train runs on the tracks is because the train usually pulls some passengers and heavy goods, etc., and the body and wheels of the train are made of steel, resulting in each carriage is very heavy. If the train runs directly on the road, then it will inevitably cause the road to be crushed and noisy.

This problem can be avoided by using some tracks, so that the pressure on the ground can be reduced and carried a lot. Another reason is that laying rails can reduce the friction between the train and the ground, because the fast movement of the train can form a relatively weak friction on the smooth track, which is conducive to increasing the speed of the train.

In addition, the inclination of the track and the slope of the wheel flange are so smooth that only the installation of the train track can make the train turn smoothly. In addition, the track also has a very important role in reducing the area occupied and saving money. And the wheels of the train are solid iron, if you want to travel quickly, you must find a material with high hardness and high toughness to withstand the pressure, therefore, the construction of the track is also very particular, the section of the railway is generally trapezoidal, there are rails on it, and below is the sleeper, the sleeper is the gravel below, if you carefully observe the wheel type oak, you will find that in fact, the gravel is a hard ground under the gravel, this road surface is generally black soil or concrete, It can effectively avoid the situation that the train is stuck in the ground due to stress factors and cannot drive alongside, or even derails and rolls over.

And every wheel of the train has a rim, which is a protruding part of the inside of the wheel. The main function is to prevent the train from derailing and ensure the safe operation of the train.

The body and wheels of the train are made of steel, and a train often has more than 10 carriages hanging on it, and there are also many passengers and heavy goods on it, so the whole train is quite heavy.

If a train runs on an asphalt road, it can not only crush the road surface, but also sink into the ground, even if the train can run, due to the inertia, it cannot stop at once, and there are constantly pedestrians and vehicles on the road, how dangerous it must be!

Laying tracks for trains not only distributes the weight of the train to the roadbed, but also guides the direction in which the train is going.

Moreover, the wheels and rails of the train are made of steel, and their contact area is small, which can greatly reduce the friction and thus increase the speed of the train. Therefore, the train travels on the tracks.

The rails serve two purposes: one is to bear the weight of the train and distribute the pressure to the road surface through the sleepers and gravel on the rails; The second is to guide the direction in which the train is going. If you don't let the train run on the tracks, but on the road like a car, the road will not be able to withstand the tremendous pressure on the wheels of the train and will be destroyed.

Trains are going to run on smooth tracks for less effort. More than 100 years ago, after the invention of the steam engine, there were tracks made of steel, and the resistance of the wheels of the train was greatly reduced.

The opening of the Stockton-Darlington Railway marked the beginning of the modern rail industry. Railways are highly valued by people for their speed, convenience and economy. In England, where it originated, railway construction became the hottest and most fashionable thing.

Due to the progress of science and technology to achieve mechanization and precision maintenance, now the general railway every few years of maintenance directly paved the new ballast on the old ballast tamping, no longer as in the past to screen ballast, digging the bed, etc., so that the general railway base is more and more wide and thick, coupled with the improvement of the track and the car body, now the good conditions of the general railway are soaring to more than 180 kilometers per hour.

There are many reasons for the vibration of the lead car, one may be caused by the seam of the rail, and more commonly the gap between the tread and the rail, why should there be a seam? Because the train has to turn, the tread can't be flat, plus acceleration and deceleration, you've seen the kind of slow-motion footage of a person being slapped in the face, first the piece of meat that was beaten starts to move, and then there's a fluctuation that is transmitted to the part that wasn't hit, and then the whole face is reversed.

The wind or something, the car began to vibrate, and if you want to take a high-speed camera to shoot with the wheels, you can still see the deformation, and there have been a lot of efforts to reduce the vibration. In addition, most of the 25g cars and almost all 25t cars are equipped with two acceleration sensors, transverse and longitudinal, and the high-speed rail is not being done by our company, so it is not clear.

Roads and railways are also not absolutely straight, such as rail joints. Even when riding a bike, there will be a bumpy feeling. Therefore, the first factor that the subject has a sense of bumpiness is that there is no absolutely straight road.

Because it is not only the road surface straightness that influences, but also the suspension system of the vehicle itself determines the presence of vibrations. Vehicles here include cars, trains, and bicycles, and their respective suspension systems are spring damping systems.

There are too many dynamics problems here, just to say that the function of the suspension system is to keep the frequency and amplitude of the vibrations within the acceptable range of the passengers, rather than completely eliminating the vibrations. I don't know if the vibrations can be eliminated completely, it's a philosophical question.

But even if it could be eliminated completely, the cost would be enormous. Then the second thing that the subject has a sense of bumpiness is that the vehicle suspension system cannot completely eliminate vibration.

One reason for this is the use of ballastless tracks for high-speed railways. The ballastless track is based on concrete, asphalt mixture, etc., and the structure is stable. Another reason is the use of seamless steel rails, which reduces the collision between the wheels and the rails, greatly reduces the bumpiness and noise during the train journey, and improves the comfort of passengers.

Trains may be more prone to bumps due to their slower speed.

Because the tracks and road conditions of the train are very complicated, it is more bumpy than the bullet train.

Because the suspension system of the train is different from that of the bullet train, and the speed is slower.

This is because the power system of the train and the bullet train is different, so the train is more bumpy.

That's because the design and technology level of the train in all aspects are not as good as the bullet train.

Because the train is slow, it will be very bumpy.

The power take-off system and suspension system of the train are inferior to those of the bullet train.

The bullet train uses seamless steel rails, and there is no sound of ordinary wagon frames.

Under normal circumstances, the wheels of the train will not slip. Because the train has been designed to calculate a reasonable adhesion coefficient between the wheels and the track, this coefficient ensures the relationship between the locomotive power, its own weight and traction, and at the same time, there is a limit on the total weight of the traction train in actual operation, so the locomotive wheels generally will not slip. At the same time, the advanced locomotives now have automatic control systems to prevent skidding, and in the ice and snow season, the locomotives also have sandblasting equipment to prevent the wheels from slipping.

A light rain on a ramp in the thousandths will make it idle! There was an accident where the wheels of a locomotive were idling and grinding the rails down a pit! And the running speed will drop sharply when idling, but due to the sharp rise in the speed of the moving wheel, it will cause the speed measuring device to falsely report the speed, and if it is serious, it will lead to a sudden increase in speed, causing the luck to be recorded because of the over-limit speed automatic release or even very!

At this time, it is necessary to return to the handle to eliminate idling, but it is easy to cause the speed to still not go up when the handle is lifted again, which can easily lead to slope stopping, and finally can only request rescue! Generally, a small amount of back to the handle and then step on the sand, and blow the sand in the sand box to the place where the tread of the moving wheel and the rail are in contact with the sand pipe in front of the locomotive moving wheel, so as to increase the friction coefficient between the wheel and rail and eliminate idling.

The nationwide railway network seems to have allowed us to realize the magic of teleportation.

The nationwide railway network seems to have allowed us to realize the magic of teleportation.