1. 快速移动式路面加载车MLS测试国家标准和全球应用
Mobile Load Simulators(MLS) and Their Global Applications with Testing Standards
快速移动式路面加载车MLS测试国家标准和全球应用
Yuchen Wang
South Africa-China Transport Co-operation Center(SACTCC)
Wayne Zhang
International Society of Mobile Load Simulator(ISMLS)
10 July 2019, CSIR ICC, Pretoria, South Africa

2. Location of South Africa 南非地理位置

3. Mobile Load Simulator移动式路面加速加载车

4. South Africa南非 Geographic and economic Political Technology
Research at Universities
Transport & Infrastructure
Innovation
Others

5. South African National Road Network

7. Road condition assessments for SA National Road

8. s

9. s

12. MLS Specifications Pave®MLS11 Pave®MLS30/33 Pave®MLS66/69
Pave®MLS11
Pave®MLS30/33
Pave®MLS66/69
Wheel Carriages #
4 wheel bogies
6 wheel bogies
Full load test section length mm
1070
3000/3300
6600/6900
Tyre footprint length
1420
4000
7600
Traffic Wheel width 80
590
Trafficking width (lateral traffic width)
(0 to ±75 wander)
(0 to ±500 mm wander)
Lateral Traffic Load Distribution
Gaussian or channelised
Gaussian, step function, channelised or any user definable distribution
Wheel description and configuration
single
dual / super single
dual / super single/ aircraft
Tyres
Vredestein 6 ply pneumatic – 300mm diameter
Goodyear 285/70 R19.5 and super single 495/45 R22.5
Goodyear 305/70 R22.5 and super single 495/45 R22.5 or H40x14 aircraft
Tyre pressure
kPa
Wheel load kN
Wheel suspension and load control
Constant Load - Mechanical Spring
Costant load - Pneumatic Hydraulic
Wheel velocity
m/s
0.5 to 2.5
1.5 to 6
Nominal maximum wheel passes
# / h
7200
6000
Rut depth (max) 10 40
Noise level dB -
85 at 7.2m
Fabrication unit
Metric system
Life span of structural frame
30 Years subject to normal wear and tear.
Expected fatigue of bogie frames measured in machine load cycles
100 million
Mass kg
700
39,000
46,000
MLS dimensions m
2.7L x 0.7W x 1.2H
11.2L x 2.6W x 3.1H
14.8L x 2.6W x 3.1H

13. MLS Advantages 12 times faster: up to 22km/h + up to 6 wheel bogies
Movable, Self-walking, for indoor and outdoors
Wandering test
LIM technology - Linear Induction Motors
Low cost running and maintenance

14. Global MLS Users

17. Overview of MLS

18. Mechanism of Model MLS

20. Moving MMLS in R80 site

21. Rutting Testing

22. Inside Model MLS

23. Simulating Environment at Pretoria West R80

24. Taking the cylinders on site

25. Winter Testing On Sites

26. Winter Testing

27. National Standards of Model Mobile Load Simulator

28. International Society of MLS

29. MLSUG Full-scale
SEU & JSTI
Liaoning
EMPA
Changsha
BASt
Tongji

30. MLS Users Group

31. MLSUG 1/3 scale
Out of China
JSTI
Tongji
Guangdong
Changsha

32. Proposed Technical Seminars
1). World Transport Convention (WTC), May 2020, Beijing, China
2). Seminar of Fast Moving Loading Big Date and Standards of MLS, July 2020, Pretoria, South Africa
Others