China High Speed Train The Key Technologyies And Maintenance System

Topics: TGV, High-speed rail, Traction motor Pages: 48 (1752 words) Published: April 17, 2015
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 car-body Parameters
• more than 20 years service life
• ±6000Pa airtight strength requirements
• Weight: less 8.5t, under 15% of total
surface pressure bypassing

Airtight fatigue strength analysis

Key technologies --

Bodies

Vibration and Noise Control
¾

¾

¾

The conventional measures of sound
isolation/absorption, have little effect on
structure-borne noise.
As shown in the Fig., the study needs to
emphasize optimizing the structural design
and controlling the vibration mode of
structure.
However, the body of the train is a 25mlong enclosed sheet. For such a structure of large enclosed strip, body mode and
interior acoustic mode easily resonate due
to external excitations like wheel-rail. The
resonance might cause acoustic-structure
coupling.

Pantograph-Catenary noise

Aerodynamic
noise
Structure noise

Equipment
noise

Wheel/rail
noise

Key technologies -•


Bodies

Mastering the noise source
distribution and spread rule
Analyzing the interior noise spectrum

Key technologies – Aerodynamic nose design

Pressure
distribution

Tunnel
crossing

Lateral force

Train
bypassing

Aerodynamic
Noise

An optimization process to reduce drag, noise, pressure waves and lift Before

Opt1

Section Rate

Opt2

Molding Angle

Control outline

Key technologies --

Pantograph

Requirements
• Excellent aerodynamics
• Less drag and noise
• Good following
• Better matching between the skate and
line

Keys
• Stable current-collection with simple
catenary structure at 350km/h
• Stable current-collection with two
pantographs
• Drag and noise reduction

Key technologies --

Pantograph

• the fully compensated
simple catenary system
• the novel copper base alloy
contact wire with high tensile
strength and well conductivity
• optimizing the space
between the...
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