HOW THEY DO THAT

SHINKANSEN (THE BULLET TRAINS)

BYR. VIGNESH113A1A0206

GLOBAL COLLEGE OF ENGINEERING AND TECHNOLOGYKADAPA

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CONTENT

• ABSTRACT

• INTRODUCTION

• CONSTRUCTION OF WHEELS

• AVOIDING OF HUNTINGS

• POWER INPUT

• ACHIEVING HIGH SPEEDS

• PROTECTION

• CONCLUSION

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In this page we are going to know about the high speed bullet trains in China. We all well known that

China is leading the technology innovations. We also known that they are using World’s fastest trains.

But we don’t known that how the constructed that and using without any failure.

ABSTRACT

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INTRODUCTION

Japan’s bullet train worlds fast high speed rail. Still the most technological in the

world. In its life it shifted the equivalent population of the earth in 200 miles per hour.

All we know that japan is the leading in the technology in the world and the fastest

bullet train is in japan only. Let’s know about the fastest train in the japan BULLET

TRAIN. The high speed train in the japan can reach up to the speed of 443km/hr.

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DESIGN OF BULLET TRAINS

The designing of high speed trains is begins with wheels of the train

DESIGNING OF WHEELS

The wheels of the bullet trains are not the same as the usual locomotives because

for normal locomotives the wheels not much flattened as the high speed locomotives.

Due to achieving the high speeds the wheels must be flattened

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NORMAL LOCOMOTIVE WHEELS HIGH SPEED TRAIN WHEELS

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AVOIDING OF HUNTINGS

After getting the wheels the main problem is the hunting oscillations. To avoid the

hunting oscillations coils that are wounded at a tension is used simply springs are used

to avoid hunting oscillations.

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POWER INPUT

To get that speed by using electrical power the train must supply the continuous supply without any disturbance. In

general electric traction uses about 25KV of supply. At those high voltages any disturbances occur at the attachment of

pantograph and the supply line large amount of arc is generated in some cases even the train may get damage. To avoid

this damage the engineers uses the simple principle of the great scientist Archimedes.

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Archimedes principle

Practically, the Archimedes principle allows the buoyancy

of an object partially or wholly immersed in a liquid to be

calculated. The downward force on the object is simply

its weight. The upward, or buoyant, force on the object is

that stated by Archimedes' principle, above. Thus the net

upward force on the object is the difference between the

buoyant force and its weight. If this net force is positive,

the object floats; if negative, the object sinks; and if zero,

the object is neutrally buoyant - that is, it remains in place

without either rising or sinking.. In simple words

Archimedes principle states that when a body is partially

or completely immersed in a fluid, it experiences an

apparent loss in weight which is equal to the weight of the

fluid displaced by the immersed part of the body.

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PANTOGRAPH STRUCTURE IN BULLET TRAIN

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ACHIEVING HIGH SPEEDS

After power on the board the next challenge is to change the electric power into speed. For this there must be

good balance and weight is required. Based on this all the trains and cars moving. With the good traction we

can achieve more speeds. In general locomotive only on unit at the starting carriage has its own motors but

in the bullet trains the power pointing is at only starting and the ending apart from this each carriage has its

own motors. Each motor drive contains two wheels. Totally the bullet train is 112 wheel drive.

The Shinkansen has used the electric multiple unit configuration from the outset, with the 0 Series

Shinkansen having all axles powered. Other railway manufacturers have traditionally been reluctant, or

unable to use distributed traction configurations (e.g. Talgo utilised the locomotive configuration with the

AVE Class 102 and plans to continue with it for the Talgo AVRIL on account of the fact that it is not possible

to utilise powered bogies as part of the Talgo Pendular system). In Japan significant engineering desirability

exists for the electric multiple unit configuration. A greater proportion of motored axles results in higher

acceleration, meaning that the Shinkansen does not lose as much time if stopping frequently. Shinkansen

lines have more stops in proportion to their lengths than high-speed lines elsewhere in the world.

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PROTECTION

Next challenge to the engineers is to keep the speed up at along the way. For every high speed vehicles at

the curves both the centripetal and centrifugal forces are acting on them. At high speeds it is more effect on

the object.

CENTRIPETAL FORCE CENTRIFUGAL FORCE

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To avoid this here is the key roll of ancient chariot, the ancient chariot lean to the sides during bending this

avoids the centrifugal force on the chariot and keep balance on the chariot by falling aside

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For bullet trains it is not easy to lean while turning. For this the engineers use the

computerized air cushions are arranged at the every compartment of the train. By this at the

time of turning the automated air cushions are lift the train aside to avoid the falling of train

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DURING EARTHQUAKES

Because of the risk of earthquakes, the Urgent Earthquake Detection and Alarm System (UrEDAS)

(earthquake warning system) was introduced in 1992. It enables automatic braking of bullet trains in the

case of large earthquakes.

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CONCLUSION

It is really astonishing the bullet train is fast, earth quake proof and in time. The bullet train engineers

get technologies at 200 years ago to 21st century. This remarkable revolutionary train is nothing without

the ancient chariot racing, the 19th century luxury car, the telegram machine and the principle of and

scientist Archimedes.

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