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High Speed Rail Transportation. Basics & Terminologies

anant_s

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The purpose of this thread is to make reader aware of basic terminologies, technical parameters and underlying engineering philosophies involved in High Speed Rail Technology, with a bit of history.

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High Speed Rail History
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19th – 20th CENTURY From birth of railways to HSR
The history of railways is a history of speed.
Since the origin of railways in Europe during the Industrial Revolution at the beginning of the 19th Century, the speed of passengers trains was an essential argument to compete, not necessarily with other transport modes (the railway in itself changed the scale of time for passenger travel) but among the different companies. The speed on rails also constituted an evidence of technological development of the most advanced countries at that time.

It’s easy to imagine that the 50 km/h reached by the impressive “Rocket” locomotive from George Stephenson in 1829 represented a true high speed consideration for railways since the beginning.

And very soon railways reached even much more impressive speeds: 100 km/h before 1850, 130 km/h in 1854, and even 200 km/h at the beginning of the 20th Century.

In any case, these were just speed records. The maximum speed in revenue operation was much more modest but nevertheless important, reaching 180 km/h as the top speed and 135 km/h as the average speed between two cities in the 1930s, with steam, electric or diesel power..

But the appearance on stage of other transport modes, aviation (offering more speed) and private cars (offering point to point travels in privacy and forgetting frequency), forced passenger railways to use their best arguments to compete.

1964 The birth of Shinkansen
After some significant speed records in Europe (Germany, Italy, UK and specially France, 331 km/h in 1955), the world was surprised when, on 1 October 1964, Japanese national railways started the operation of a fully brand new 515 km standard gauge line (1435 mm, apart from conventional lines previously built in Japan, in meter gauge), the Tokaido Shinkansen, from Tokyo Central to Shin Osaka.
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This line was built to provide capacity to the new transport system necessary for the impressively rapid growth of the Japanese economy. JNR president Shinji Sogo and Vice President for Engineering Hideo Shima promoted the concept of not only a new line, but a new transport system, called to be extended later to the rest of the country and to become the backbone of passenger transport for the future generations of citizens in Japan.
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The Tokaido Shinkansen was designed to operate at 210 km/h (later increased), broad loading gauge, electric motor units powered at 25 kV ac, Automatic Train Control (ATC), Centralised Traffic Control (CTC) and other modern improvements.

High Speed Rail (HSR) was born.

1964 – 1981 The birth of the TGV
After the big success of the Shinkansen operation, technical progress in several European countries, particularly France, Germany, Italy and UK, developed new technologies and innovations aimed to establish the basis for the "passenger railway of the future".
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Despite an unknown future (Concorde, political opposition, 1973 first petroleum crisis, etc.) and even if several other existing or new transport modes intended to compete with the classic railway concept, finally SNCF, the national French railway company, started the operation of the first high speed line between Paris to Lyons on 27 September 1981, at a maximum speed of 260 km/h.

The European HSR was born, but in contrast to the Shinkansen concept, the new European HSR was fully compatible with existing railways and this largely conditioned the further development of the system in the Old Continent.

1981 – 2009 HSR services spreading in the world
Once again, after the big success of the TGV, each European country looked for the new generation of competitive long and medium distance passenger rail services, in some cases by developing its new technology and in others by importing.

Joining the group of countries offering high speed rail services in Europe were Italy and Germany in 1988, Spain in 1992, Belgium in 1997, the United Kingdom in 2003 and the Netherlands in 2009.

In the meantime, some similar cases appeared in other countries and regions, such as China in 2003 (even if the big development came later, in 2008), South Korea in 2004, Taiwan Railway High Speed Corporation in 2007 and Turkey in 2009.

2009 and beyond From yesterday to tomorrow. The HSR of the future
A new dimension and a new perspective for HSR started in China on 1 August 2008. The 120 km high speed line between Beijing to Tianjin represents just the first step in a huge development to transform the way of travelling for the most populated country in the world. Since 2008, China has implemented almost 20,000 kilometres of new high speed lines and thanks to an enormous fleet of more than 1 200 train sets, carries 800 million passengers per year (2014 and growing), more than the half of the total high speed traffic in the world.

And following the example led by China, new high speed systems are under development around the world: Morocco, Saudi Arabia, USA, etc.

Accordingly with 2015 expectations, and in spite of the development of other transport modes (for example the Maglev, automatic driving cars, improvements in aviation, etc.), by 2030-2035, the extension of the world HSR network could reach more than 80,000 kilometres, representing an important challenge for operators, industry, authorities, etc.

High speed must be continuously developed and performed in order to continue to be present in passenger transport in the next 50 years (or more).
 
nice @AndrewJin is hsr fanatic here and the chinese hsr thread is very nice. and their trains are very good having been on one. we are geting hs2 done here and hopfully hs3 so i can get it.
we have no idea what rolling stock were getting but it very likely we are getting the agv or a variant of it as we need a custom train
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There is a report from World Bank on one of the World Bank financially supported HSRs in China.
Mainly about passengers' view and its economic impacts
In China, high-speed rail increases mobility and drives growth in underdeveloped regions
World Bank: A Look at the Impact of China's GuiGuang and NanGuang Rail Lines



Considering tech, China's North Railway Corp and South Railway Corp are upgrading their trains to the new CRH350 platform, hopefully can be largely manufactured in late this year and 2017.

1:30, 420+420=840km/h relative speed
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For the future, who knows what will happen?
We are experimenting CIT500 which is designed to commercially operate at 500+km/h.
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We'll soon witness the inauguration of Zhengzhou-Xuzhou HSR, part of the Silk Road HSR in September, and the final section of 2000+km Shanghai-Kunming HSR in December!
 
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1:30, 420+420=840km/h relative speed

Interesting sectioning post @0:24.
& yes andrew, the train is mighty stable even with a crossing of another HST. Great bit of engineering :tup:
 
I was surprised to learn that these HSR run on railway tracks similar that of a standard broad gauge....
 
I was surprised to learn that these HSR run on railway tracks similar that of a standard broad gauge....
What do you mean? :o:
 
Not Similar Sir.
they run exclusively on Standard gauge tracks
View attachment 318393

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The new High Speed train networks planned in India, too would run on Standard gauge.


recent high speed (840+ kph relative velocity) testing by CRH
I'm just wondering, well, this is just my thought, why not design a HSR system based on broad-gauge in India?
U know one feature of Chinese HSR is a huge number of thru services from existing lines to new high-speed rail. For example, the bullet train from the nearest station from my home to Beijing first travels on exiting lines for like 50km and then on the HK-Beijing HSR.

If India can designs a broad-gauge HSR system, then it will be compatible to existing railway system. You can upgrade existing lines to semi-HSRs and integrate them with new lines. You can also use existing railway stations (like the one I usually use) for bullet train services. At night, you can use the regular Indian night trains on new lines (we have night trains on HSRs in China).

Regular overnight trains on HSRs!
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why not design a HSR system based on broad-gauge in India?
I asked this question to one of my friend working with Indian Railways (Pathway Department). I also asked him this thing in context of stupendous work by China. His answers are as follows:
  1. At high speeds, dynamic response of moving mass is extremely different. If you are aware of vibrating systems (in multi axis configuration), each system behaves very differently with increase in speed as the initiating frequency too changes with speed. So for a given mass (meaning train coaches and locomotive itself), increase in speed calls for new stability analysis and checks.
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  2. As a thumb rule, increase in speed, increases oscillating accelerations, so larger the mass, applying newton's second law (F=m.dv/dt), will give you increase in unbalanced forces, which will increase free movement of train causing jerks.
  3. This dynamic system calls for standardized methods of establishing stability (in other words controlling oscillations) and that includes track structure (spacing and its laying) and then designing stiffness and damping in bogies.
  4. Next, when a train moves on a 3D geometry (assume the horizontal ground as x and y axis and train ascending on a gradient as z axis), there is a change in velocity vector, leading to another acceleration element and hence force. To counteract this, HST tracks are much straighter and gentler curves.
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  5. Finally the braking. When a moving mass brakes at high speed, it puts on track what is called a lateral force. Now here a heavy freight train moving at relatively low speed or a lighter HST moving at high speed, affect in same way as momentum (Q, mass x velocity) is pretty much same. So again applying newton's second law (F=dQ/dt), it leads to large forces on track, which it should be designed to accommodate on a long commercial basis. This consideration is of significance on bridges which transmit the dynamic forces much differently than track on solid earth.
Now in India. we have a huge broad gauge network, but it is essentially designed for slower mixed traffic service and therefore has sharp curves, bridges that allow heavy mass to move but sacrificing speed (we call it PSR or Permanent Speed Restriction) and switches that would call for clamping down speed to avoid derailment.

Now, i was told that if we try, we can too run HSTs (Like TALGO did recently by running a train at 180 kph on a conventional track), but it will involve massive investment in terms of R&D into technology and physical infrastructure such as signalling, elimination of level crossing (it already is underway) etc. But all this will come with a big constraint. Since track network is shared, what happens to slower trains moving on them. An HST requires larger right of way (as braking distance is larger), a slow train moving in front of it will become bottleneck.

Coming back to Chinese context, which i asked. Again China has invested massively in its HST by creating new capacities (by which i mean new tracks and associated civil and electrical work). this hasn't happened overnight, but pleasantly the administration and planning departments have put consistent efforts and money, to bring it to a shape, it finds it now. New trains, signalling technology etc will now keep on evolving as you guys have a ground work prepared already.

Lastly, i personally don't think it is a good idea to work on BG technologies as it will take a lot of time. IMHO, best course of action is to identify economically viable sectors where HST can be introduced, collaborate with a mature technology provider and lay tracks and operate HST and see how it copes with Indian conditions. Once we get 1500-2500 kms of HST tracks (Standard gauge i wish to add), see how we can build up on. In long run, separate out Heavy haul freight line, commercial slower speed (upto 180 kph) passenger lines allowing medium freight services as well and HST. this way benefits of all three technologies can be reaped.

What loco class is that Brother?
 
What loco class is that Brother?
https://en.wikipedia.org/wiki/China_Railways_HXD1D
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I asked this question to one of my friend working with Indian Railways (Pathway Department). I also asked him this thing in context of stupendous work by China. His answers are as follows:
  1. At high speeds, dynamic response of moving mass is extremely different. If you are aware of vibrating systems (in multi axis configuration), each system behaves very differently with increase in speed as the initiating frequency too changes with speed. So for a given mass (meaning train coaches and locomotive itself), increase in speed calls for new stability analysis and checks. View attachment 318406
  2. As a thumb rule, increase in speed, increases oscillating accelerations, so larger the mass, applying newton's second law (F=m.dv/dt), will give you increase in unbalanced forces, which will increase free movement of train causing jerks.
  3. This dynamic system calls for standardized methods of establishing stability (in other words controlling oscillations) and that includes track structure (spacing and its laying) and then designing stiffness and damping in bogies.
  4. Next, when a train moves on a 3D geometry (assume the horizontal ground as x and y axis and train ascending on a gradient as z axis), there is a change in velocity vector, leading to another acceleration element and hence force. To counteract this, HST tracks are much straighter and gentler curves.View attachment 318412 View attachment 318413
  5. Finally the braking. When a moving mass brakes at high speed, it puts on track what is called a lateral force. Now here a heavy freight train moving at relatively low speed or a lighter HST moving at high speed, affect in same way as momentum (Q, mass x velocity) is pretty much same. So again applying newton's second law (F=dQ/dt), it leads to large forces on track, which it should be designed to accommodate on a long commercial basis. This consideration is of significance on bridges which transmit the dynamic forces much differently than track on solid earth.
Now in India. we have a huge broad gauge network, but it is essentially designed for slower mixed traffic service and therefore has sharp curves, bridges that allow heavy mass to move but sacrificing speed (we call it PSR or Permanent Speed Restriction) and switches that would call for clamping down speed to avoid derailment.

Now, i was told that if we try, we can too run HSTs (Like TALGO did recently by running a train at 180 kph on a conventional track), but it will involve massive investment in terms of R&D into technology and physical infrastructure such as signalling, elimination of level crossing (it already is underway) etc. But all this will come with a big constraint. Since track network is shared, what happens to slower trains moving on them. An HST requires larger right of way (as braking distance is larger), a slow train moving in front of it will become bottleneck.

Coming back to Chinese context, which i asked. Again China has invested massively in its HST by creating new capacities (by which i mean new tracks and associated civil and electrical work). this hasn't happened overnight, but pleasantly the administration and planning departments have put consistent efforts and money, to bring it to a shape, it finds it now. New trains, signalling technology etc will now keep on evolving as you guys have a ground work prepared already.

Lastly, i personally don't think it is a good idea to work on BG technologies as it will take a lot of time. IMHO, best course of action is to identify economically viable sectors where HST can be introduced, collaborate with a mature technology provider and lay tracks and operate HST and see how it copes with Indian conditions. Once we get 1500-2500 kms of HST tracks (Standard gauge i wish to add), see how we can build up on. In long run, separate out Heavy haul freight line, commercial slower speed (upto 180 kph) passenger lines allowing medium freight services as well and HST. this way benefits of all three technologies can be reaped.


What loco class is that Brother?
I understand your viewpoints, standard-gauge technology is already there, it'll be much more efficient to localise it in India.
What I concern is that, it will create a completely separate system, think about the maglev train in Shanghai Metro.
If you look at Europe, Japan and China, high-speed railway network is closely integrated with original railway network.
It does not mean, bullet trains have to travel like 300km/h on an old railway.
For example, if there is Delhi-Agra HSR, you can also have direct service from Chandigarh to Agra first on old rail at 120-160km/h until Delhi.

I show you a map of railway network in my city, u can see all HSRs and old railways are actually in one system.
(we even have connection lines from HSRs to subways)
Red lines 300-350km/h
Green lines 200-250km/h
Black lines: conventional<200km/h
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Guangzhou
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Europeans and Asians currently operate the fastest high speed trains in the world, regularly commuting on trains such as the Shanghai Maglev and Harmony CRH 380A. While these two currently hold all the records, other fast trains, such as the HEMU-400X, Zefiro 380 and Talgo Avril, are close contenders for the crown of world's fastest trains. Railway-technology.com lists the top ten fastest trains currently in service.

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Shanghai Maglev
Shanghai Maglev tops the list with its maximum operational speed of 430km/h and average speed of 251kmph. The Maglev started commercial operations in April 2004.

It runs on the 30.5km Shanghai Maglev Line, which is the first commercially operated high-speed magnetic levitation line, extending from Longyang Road Station of Metro Line 2 and ending at Shanghai Pudong International Airport.

Shanghai Maglev is owned and operated by Shanghai Maglev Transportation Development Co. (SMTDC). The train was constructed by a joint venture of Siemens and ThyssenKrupp.


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Harmony CRH 380A
Harmony CRH 380A, with maximum operational speed of 380kmph, is currently the second fastest operating train in the world.

The electric multiple unit (EMU) set a record by speeding at 486.1kmph during its trial operation on the Shanghai-Hangzhou intercity high-speed railway in December 2010.

The CRH 380A was put into operation in October 2010. It operates from Beijing to Shanghai and provides daily service along Wuhan to Guangzhou route.

The vibration free train was constructed by CSR Qingdao Sifang Locomotive & Rolling Stock. Its high design speed is a result of research carried out at various Chinese universities.

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AGV Italo
AGV Italo is the first train in the AGV Series which entered into service in April 2012. It has a maximum operational speed of 360kmph.

The train is fitted with traction system that broke a record speed of 574.8kmph in April 2007.

Considered to be the most modern train in Europe, AGV Italo was built by Alstom. The train currently runs on the Napoli - Roma - Firenze - Bologna - Milano corridor.

The train complies with the European TSI interoperability standard, which includes safety, reliability and availability, health, environmental protection and technical compatibility.

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Siemens Velaro E / AVS 103
Velaro E, designated as AVE S 103 in Spain, is the fastest series-production high-speed train in the world. It achieved a whopping speed of about 400kmph during its test trips in Spain.

The train possesses an operational speed of 350kmph.

The train was ordered by Spanish National Railways Renfe, and operates on the Barcelona-Madrid line. It was delivered in July 2005 and began operations in June 2007.

The design of the multiple-unit train was founded on the latest developments of the successful ICE 3 trainset designed for Deutsche Bahn.

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Talgo 350 (T350)
Talgo 350, which initially entered service with the name RENFE AVE Class 10, achieved a maximum speed of 365kmph during its trial run. The train has a maximum operational speed of 350kmph.

T350 was developed by Patentes Talgo (Tren Articulado Ligero Goicoechea Oriol) and manufactured by Patentes Talgo in collaboration with Bombardier Transportation.

Commonly known as El Pato (meaning The Duck in Spanish), the train has been operating on the Madrid-Zaragoza-Lleida section of the Madrid-Barcelona line in Spain since 2005. There are currently more than 46 operating trains of the series in the country.

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E5 Series Shinkansen Hayabusa
E5 Series Shinkansen Hayabusa trains, which entered service in March 2011, with an initial maximum speed of 300km now run on the Tohoku Shinkansen Line with a maximum operating speed of 320kmph.

Currently the fastest in Japan, the train achieved a speed of about 400kmph during trials.

The train was manufactured by Kawasaki Heavy Industry (KHI) and Hitachi, while East Japan Railway Company (JR East) is the operator.

The train features full active suspension (FSA) system, which reduces the vibration of the moving bogies, and a 15m long nose which reduces the sound blast in tunnels.

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Alstom Euroduplex
Alstom-built Euroduplex is the third generation of TGV Duplex, which entered service in December 2011. The trains in the series are touted to be the only double-decker, interoperable high-speed trains capable of running on European networks at 320kmph.

The Euroduplex was initially introduced on the Rhine-Rhone LGV high-speed rail line. The train is capable of transporting 1,020 passengers (multiple units), compared to TGV Duplex which transports about 512 passengers.

Euroduplex trains are designed to operate on French, German, Swiss and Luxembourgish rail networks. They are equipped with traction systems adapted to different electric currents used across Europe.

Some of the trains in the series will also be capable of operating in Spain.

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TGV Duplex
TGV Duplex was manufactured from 1996-2004. They are operated by SNCF and were manufactured by Alstom and Bombardier. The trains can reach maximum speeds of 300kmph to 320kmph.

TGV Duplex is Alstom's first third-generation double-decker/duplex train. It provides a seating space for 512 passengers in its upper and lower decks. The train is constructed of aluminum to reduce weight.

The trains in the TGV Duplex series mainly run on the TGV Méditerranée line between Paris and Marseille.

More than 450 TGV series trains are currently serving 230 destinations.
 
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ETR 500 Frecciarossa Trains
Elettro Treno Rapido 500 (ETR 500) Frecciarossa trains entered into service in 2008. The trains are designed for a maximum speed of 360kmph and currently run at 300kmph on high speed lines.

The Frecciarossa (Red Arrow) is a renovated version of the ETR 500. The renovated trains operate between Rome and Milan.

The cars are equipped with climate control and sound insulation, and feature ergonomic seats to provide maximum comfort.

The trains in the fleet are operated by Trenitalia and manufactured by TREno Veloce Italiano (TREVI), a consortium of Alstom, Bombardier and AnsaldoBreda.

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THSR 700T
The THSR 700T operates on the high-speed line between Taipei and Kaohsiung in Taiwan. The train entered into service with Taiwan High Speed Rail in January 2007.

It operates at a speed of 300kmph reducing the journey time between the two cities from four hours to just 90 minutes.

It was constructed by Kawasaki, Hitachi and Nippon Sharyo. Based on Kawasaki's 700 series Shinkansen trains, the 700T was the first Taiwanese rolling stock to import Japanese high speed rail technology.

The total investment for manufacturing the initial 30 trains in the series reached about NT$100bn ($3.4bn).
 
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