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China High Speed Train The Key Technologyies And Maintenance System

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China High Speed Train The Key Technologyies And Maintenance System
CHINA High Speed Train

The key technologies and maintenance system

Gan Dunwen Associate Researcher
China Academy of Railway Sciences

中国高速铁路网规划
China high speed railway development planning

¾ Speed upgrade on existing railways: 200 ~ 250km/h,
8000 km
¾ 41 Passenger Dedicated
Lines by 2012, more than 13000 km;
¾ 16000km by 2020

CRH R&D System

CRH R&D System

Contents
Key technologies for High Speed Trains
„ HSTs Maintenance System in China
„ Challenges to CRH
„

Key technologies for HSTs

Key technologies --

System Integration

Key technologies --

System Integration

HSTs’ systems integrators – CSR & CNR
A high level of technology platform and R&D team of innovation
The world first-class bogie, car body, assembly, debugging production lines

Bogies Lines

Car-body Lines

Assembly Lines

Debugging Lines

• new-built 300 EMUs /year
• overhaul 200 EMUs/year

The whole manufacturing process technology design, craft standard system
Continuous improvement technology innovation system

Key technologies --

Bogies

Structure function
• Running Machinery
•The core of HSTs
• Loading, directing, suspension, traction and braking etc.

Keys
• Anti-roll movement
• Derailment safety
• Structural strength and reliability

Key technologies --

Bogies
Yaw damper

Nonlinear critical speed >550 km/h

• Improving box positioning stiffness according to line

Postioning Stiffness

conditions
• Selecting yaw damper parameters, and ensuring redundancy
• Determining the maintenance cycle to ensure a good equivalent

equivalent conicity

conicity
Wheel/rail surface
Matching

Key technologies --

Bodies

Structure characteristics
• Thin-walled cylindrical aluminum alloy welding structure • Drum wide body (3.3m), Large sections(11.2m2)
• Thin (1.5mm) and long (25m) profiles
• Overall carrying, hanging equipment to the base plate Keys z Structure strength z Modal designing z Vibration and noise reducing z drag reducing

气动
作用

Key technologies --

Bodies

Aluminum alloy

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