Bad joint track train rail


Trains actually don't make that sound. The rails make it. A rail is not a single metal piece but a series of rail pieces with certain length. ... The sound is generated because of the lateral movement of the wheels and subsequent connection/friction with the tracks. Train noise is vehicle noise created by trains. Noises may be heard inside the train and outside. Various parts of a train produce noise, and different kinds of train wheels produce different amounts of noise. Noise barriers can attenuate the noise. Subways, Light Rail transit and freight trains can send loud train noise into neighborhoods. Organizations such as the World Health Organization and the U.S. Environmental Protection Agency have set guidelines for noise level decibel limits for Rapid Transit Train noise can be a type of environmental noise. When a train is moving, there are several distinct sounds such as the locomotive engine noise and the wheels turning on the railroad track. The air displacement of a train or subway car in a tunnel can create different whooshing sounds. Trains also employ horns, whistles, bells, and other noisemaking devices for both communication and warning. Trains propelled by electric traction motors often produce electromagnetically-excited noise. This high pitch noise depends on the speed and torque level of the machine, as well as on the motor type. Variable frequency drives use Pulse-width modulation technique which introduces additional current harmonics, resulting in higher acoustic noise. The switching frequency of the PWM can be asynchronous (independent of the speed), synchronous (proportional to the speed), but always results in acoustic noise varying with speed. Flange Squeal is the sound of the flanges of the metal train wheelset turning on the train track.

Bad joint track train rail


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Why Do Trains Make so Much Noise



Why Do Trains Make so Much Noise Why do trains honk really loud at night? Why do trains make a rhythmic noise when going Why do trains in India make so much noise and sound? Why do trains make those rhythmic sounds Trains actually don't make that sound. The rails make it. A rail is not a single metal piece but a series of rail pieces with certain length. ... The sound is generated because of the lateral movement of the wheels and subsequent connection/friction with the tracks. Train noise is vehicle noise created by trains. Noises may be heard inside the train and outside. Various parts of a train produce noise, and different kinds of train wheels produce different amounts of noise. Noise barriers can attenuate the noise. Subways, Light Rail transit and freight trains can send loud train noise into neighborhoods. Organizations such as the World Health Organization and the U.S. Environmental Protection Agency have set guidelines for noise level decibel limits for Rapid Transit Train noise can be a type of environmental noise. When a train is moving, there are several distinct sounds such as the locomotive engine noise and the wheels turning on the railroad track. The air displacement of a train or subway car in a tunnel can create different whooshing sounds. Trains also employ horns, whistles, bells, and other noisemaking devices for both communication and warning. Trains propelled by electric traction motors often produce electromagnetically-excited noise. This high pitch noise depends on the speed and torque level of the machine, as well as on the motor type. Variable frequency drives use Pulse-width modulation technique which introduces additional current harmonics, resulting in higher acoustic noise. The switching frequency of the PWM can be asynchronous (independent of the speed), synchronous (proportional to the speed), but always results in acoustic noise varying with speed. Flange Squeal is the sound of the flanges of the metal train wheelset turning on the train track.

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Channel:https://www.youtube.com/user/diiselrong
Why do trains make so much noise

China's latest engineering marvel


World’s tallest horizontal skyscraper’ will feature two swimming pools, restaurants and a light show 820ft in the air A Chinese city is about to complete the country's new landmark after six years of construction. The project was designed by architect Moshe Safdie. It was inspired by Chinese sailing vessels and is a tribute to Chongqing historical past as a maritime trading centre. An enormous commercial complex comprising eight skyscrapers, the £2.7 billion mega-structure in Chongqing, south-west China, has a huge rooftop corridor laid across the tops of four 60-storey buildings at 820 feet. Stretching 984 feet in length as if a horizontal skyscraper, the spectacular glass-walled structure is nearly as long as The Shard in London laid on its side and three times the height of the Statue of Liberty in New York. The property, called Raffles City Chongqing, is invested by Singaporean real estate company CapitaLand which owns a chain of shopping malls and office buildings across China. Workers have recently topped out the eighth and final skyscraper after starting out on the project in 2013, and the 12-million-square-foot project is expected to open in the second half of this year. Apart from a super-size shopping centre which will have 450 shops, the complex will also have offices, apartments, a hotel and a major transport hub comprising ferry, subway and bus stations. It has been described as 'a vertically-built riverfront urban district' by Lucas Loh, President of the China and Investment Management department at CapitaLand Group. According to Mr Loh, workers are now focusing on the interior fit-out works, including transplanting trees to 'enliven' the sky bridge.
China's 'horizontal skyscraper

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Japan's longest nose train


At 22 meters, Japan Railways’ next-generation bullet train sports the longest, sleekest nose of any train that’s gone before. The high-speed Alfa-X is set to begin testing in 2019 and will serve routes in the region of Tohoku east of Tokyo, and north to the island of Hokkaido. The fastest bullet train in operation today travels at almost 320 kmh (198 mph), but the Alfa-X— or E956 Series to give it its official name — will whisk passengers along at a breathtaking 360 kmh (224 mph). During the test phase, however, Japan Railways hopes to push its next-generation bullet train to speeds of 400 kmh (248 mph). It’ll be the fastest commercial train service in the world, though Shanghai’s maglev train, which admittedly uses different technology, carries passengers at an even greater speed of (431 kmh) 267 mph.

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Shanghai tower largest number of floors



The World’s Second Tallest Building
Shanghai’s new landmark reaches a height of 632 meters.
Guinness world records broken by this building. Not only has the Shanghai Tower’s elevator broken the record for the largest number of floors passed, but also its elevator is officially the fastest in the world.

The Shanghai Tower was designed by the American architectural firm Gensler, with Shanghainese architect Jun Xia leading the design team.
The tower takes the form of nine cylindrical buildings stacked atop each other, totalling 128 floors, all enclosed by the inner layer of the glass facade. Between that and the outer layer, which twists as it rises, nine indoor zones provide public space for visitors. Each of these nine areas has its own atrium, featuring gardens, cafés, restaurants and retail space, and providing panoramic views of the city.



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top video china's Public transportation


High-speed rail (HSR) in China is the country's network of passenger-dedicated railways designed for speeds of 250–350 km/h (155–217 mph). It is the world's longest high speed railway network and is also the most extensively used.

By the end of 2018, HSR extended to 30 of the country's 33 provincial-level administrative divisions and reached 29,000 km (18,000 mi) in total length, accounting for about two-thirds of the world's high-speed rail tracks in commercial service.[4] The HSR building boom continues with the HSR network set to reach 38,000 km (24,000 mi) in 2025.

Almost all HSR trains, track and service are owned and operated by the China Railway Corporation under the brand China Railway High-speed (CRH). The China Railway High-speed (CRH) high-speed train service was introduced in April 2007 featuring high-speed train sets called Hexie Hao (simplified Chinese: 和谐号; traditional Chinese: 和諧號; pinyin: Héxié Hào; literally: "Harmony") and Fuxing Hao (simplified Chinese: 复兴号; traditional Chinese: 復興號; pinyin: Fùxīng Hào; literally: "Rejuvenation") running at speed from 250 km/h to 350 km/h on upgraded/dedicated high-speed track. The Beijing-Tianjin Intercity Rail, which opened in August 2008 and could carry high-speed trains at 350 km/h (217 mph), was the first passenger dedicated HSR line.

High-speed rail developed rapidly in China over the past 15 years with substantial funding from the Chinese government, especially the economic stimulus program during the Great Recession. The removal of Railway Minister Liu Zhijun for corruption and a fatal high-speed railway accident near Wenzhou in 2011 raised concerns about safety as well as affordability, financial sustainability and environmental impact.




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Super flight china's bullet train



 all HSR trains, track and service are owned and operated by the China Railway Corporation under the brand China Railway High-speed (CRH). The China Railway High-speed (CRH) high-speed train service was introduced in April 2007 featuring high-speed train sets called Hexie Hao (simplified Chinese: 和谐号; traditional Chinese: 和諧號; pinyin: Héxié Hào; literally: "Harmony") and Fuxing Hao (simplified Chinese: 复兴号; traditional Chinese: 復興號; pinyin: Fùxīng Hào; literally: "Rejuvenation") running at speed from 250 km/h to 350 km/h on upgraded/dedicated high-speed track. The Beijing-Tianjin Intercity Rail, which opened in August 2008 and could carry high-speed trains at 350 km/h (217 mph), was the first passenger dedicated HSR line. 
High-speed rail (HSR) in China is the country's network of passenger-dedicated railways designed for speeds of 250–350 km/h (155–217 mph). It is the world's longest high speed railway network and is also the most extensively used.
 

By the end of 2018, HSR extended to 30 of the country's 33 provincial-level administrative divisions and reached 29,000 km (18,000 mi) in total length, accounting for about two-thirds of the world's high-speed rail tracks in commercial service.The HSR building boom continues with the HSR network set to reach 38,000 km (24,000 mi) in 2025.



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Japan's bullet trains in snow

Japan's bullet trains in snow


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Japan's bullet train 2020






Information, autovehiclex.blogspot, read more, Japan's bullet train 2020, Alfa-X train, Japan Unveils New High-Speed Train, bullet train japan, new bullet train, bullet train history, fastest bullet train, japan new bullet train, shinkansen supreme train, new shinkansen, new shinkansen 2020, bullet train 2020

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