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Difficulties behind China's 4,000 km / h "Super High Speed Rail"

2017-09-08 14:17

高速飞行列车的研究论证。 On August 30, China Aerospace Science and Industry Corporation dropped heavy weight and announced that it had carried out research and demonstration of " high-speed flying trains up to 4,000 kilometers per hour at high speeds up to 4000 kilometers per hour .
Combining supersonic flight technology with rail transit technology, a new generation of vehicles developed using superconducting magnetic levitation technology and vacuum pipelines to achieve supersonic "near-ground flight".
Some people imagine that the magnetic levitation trains that exceed the speed of aircraft will have a huge impact on the entire aviation industry:
Only 3 minutes from Beijing to Tianjin
Less than 20 minutes from Beijing to Shanghai
Only 30 minutes from Beijing to Wuhan
10 times faster than traditional high-speed rail
5 times faster than existing civil airliners
The maglev train has been upgraded from 400 kilometers to 4,000 kilometers, mainly relying on low vacuum pipelines. Trains running in low vacuum pipelines reduce air resistance to achieve near-ground flight. To achieve the dream of ultra-high-speed maglev trains, three obstacles must be overcome:
I. Demanding requirements of low vacuum pipeline material performance:
UV resistance: the test of UV;
Aging resistance: the service life of the material;
Impact resistance: the impact of small stones or other objects;
Toughness: The better the toughness, the less the possibility of brittle fracture;
之间多变严苛的环境; Weather resistance: withstand the harsh environment between minus 50 ° C-50 ° C ;
Air tightness: prevent air from entering.

2. Dynamic stability of maglev system under high-speed motion:
The low-speed maglev train's "off-run" error per 10 meters does not exceed 3 mm, while the high-speed maglev train's "off-run" error must be controlled within 1 mm.
Economics:
The cost is too high. Ordinary people cannot afford it. Therefore, it is necessary to find high-performance and low-priced raw materials to reduce costs.
搜料网 ”去找答案。 When encountering material problems, I usually go to SearchNet to find answers.
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