New Jersey Transit Rail Friction Investigation. December 14, 2005

Transcription

1 New Jersey Transit Rail Friction Investigation December 14, 2005

2 Personnel New Jersey Transit Stan Canjea Amtrak Jim Cisneros Ensco Eric Sherrock Ray Owings 2

3 Objective Explore Use Of Tribometer To Measure Friction Factor On New Jersey Transit Newark Light Rail System Tribometer Manufactured By Salient Systems, Inc. (A Wholly Owned Subsidiary Of Portec Rail Products, Inc ) Proprietary Algorithm Reviews The Data For Accuracy before value display Tribometer Used Owned by Amtrak 3

4 Tribometer Setup Orient Measuring Wheel To Contact Measurement Point On Rail Head Rotate Push Bar To Upright Position Adjust Cross Bar To Ride On Opposite Rail 4

5 Push Bar Electronics Enclosure Measurement Wheel Cross Bar 5

6 Cross Bar Rail Follower Display Measurement Wheel 6

7 Data Collection Two Person Operation One Person To Push Tribometer Along Rail One Person To Write Down Friction Factor Readings No Electronic Data Recording 7

8 8

9 Results 1. Measured Rail Head Friction Factor On 300 Foot Segment Of Rail Near Franklin Road 2. Tribometer Could Not Make Measurements On Segments Of Track With Guard Rails 3. Tribometer Could Not Make Measurements On Penn Station Loop Due To Interference With Outboard Rail Attachments Structures and Joint Bars 9

10 Franklin Street Measurements

11 Test Area 11

12 Franklin Street Curve 12

13 Direction of Travel Track 2 Track 1 4 Run Number 2 Runs 1 & ft long Runs 3 & ft long 3 1 Franklin Road Outside Rail Inside Rail 13

14 Run 1 Outside Rail, Track 1, Westbound Sample µ Sample µ Sample µ

15 Run 3 Inside Rail, Track 1, Westbound Sample µ Sample µ Sample µ

16 Run 2 Inside Rail, Track 1, Eastbound Sample µ Sample µ Sample µ

17 17 Run 4 Outside Rail, Track 1, Eastbound µ Sample µ Sample µ Sample µ Sample

18 Analysis Simplifying Assumption Measurements at Equal Distances for a given run Reorder data for westward motion Inside and Outside rail treated separately 18

19 Top-of-Rail Friction Coefficients Measured on Outside Rail on Track 1 At Exit of Franklin Street Curve (Test Runs 1 and 4) Friction Coefficient Run 1 Run Estimated Distance ft 19

20 Top-of-Rail Friction Coefficients Measured on Inside Rail on Track 1 At Exit of Franklin Street Curve (Test Runs 2 and 3) Friction Coefficient Test Run 2 Test Run Estimated Distance ft 20

21 Observations The TOR friction coefficient increases from a value of 0.3 up to ~0.5 as the measurements are taken away from the curve After ~150 ft the values are ~.5 Mean = 0.5 Standard Deviation

22 Guard Rail Interference

23 Guard Rail Interference Guard Rail 23

24 Restraining Rail Blocks Tribometer Body Guard Rail 24

25 25

26 Penn Station Loop Interference

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28 Penn Station Loop Rail Tie Down Structure Rail Tie Down Structure 28

29 Penn Station Loop Rail Tie Down Structure 29

30 Concluding Remarks The Portec III System on the Franklin Street Curve appears to provide friction factors of approximately 0.3 on the top of the rail at the exit of the curve on Track 1. The effect of the Friction Modifiers appears to die out about 150 ft after the end of the curve The Tribometer is not able to make friction measurements on track segment with guard rails or in the Penn Station loop where there is interference between the Tribometer body and the support structure of the rail 30

31 Weather Conditions

32 Weather Conditions Newark, NJ 32

33 Moisture Information Moisture Dew Point Average Humidity Maximum Humidity Minimum Humidity 2 F

34 Additional Measurement Equipment The TriboRailer The TriboRailer is a four-wheeled, twin-hulled carriage that attaches to and operates from a companion vehicle at speeds of 30 mph. A laptop computer within the companion vehicle directs measurement collection while pinpointing location by satellite 34

35 Updated Chart From Phase 1

36 Lateral Axle Force Required - Wheel Climb 20,000 18,000 16,000 14,000 12,000 10,000 8,000 6,000 4,000 Estimated Operating Region With Lubrication Estimated Operating Region Friction Modifiers Nominal 15% unload 30% unload Estimated Present Operating Region 2,000 - Measured Values Measured Data At Friction Factor Distances Less Than 150 Ft From End Of Curve Nominal Wheel Load = 8,000lbs Measured Values Measured Data At Distances Greater Than 150 Ft 36 From End Of Curve