Rail Neutral Temperature

Transcription

1 Rail Neutral Temperature September 24 1

2 Track Buckles 2

3 Track Buckles Frequency Year Tight Rail,Track Buckle,etc. Derailments 3

4 Neutral Temperature Measurements History Ultrasonic, Shun Kink VERSE Rail Stress Modules (RSM) Longitudinal Stress Detectors (LSD) High Speed Strain Gauged Sites 4

5 VERSE - Longitudinal Rail Force 5

6 VERSE - Longitudinal Rail Force 6

7 Buckle During VERSE Measurement 7

8 VERSE - Longitudinal Rail Force 8

9 VERSE VERSE Measurements Beneficial Rail Neutral Temperature at Bad Acting Sites Much Lower than Expected Many Below 6 o F (Should be Above 95 o F) Unable to Measure Some Sites (Rail in Compression) Measured Rail Neutral Temperatures After Program Gang Work Was Very Good (Typical Above 1 o F) Post Derailment Investigation 9

10 Bismarck, ND Track Buckle Derailment (7-5-3) Verse N. Rail SFT = 73 o F (7-1-3) MP S. Rail SFT = 87 o F Verse N. Rail SFT = 68 o F (7-1-3) MP S. Rail SFT = 68 o F Verse N. Rail SFT = 71 o F (7-9-3) MP S. Rail SFT = 67 o F Verse N. Rail SFT = 87 o F (7-9-3) MP S. Rail SFT = 83 o F 1

11 Objective: Rail Neutral Temp Inst. Change in Neutral Temp with Time Change in Neutral Temp with various Track Conditions Change in Neutral Temp with various Train Handling 11

12 Longitudinal Stress Detector (LSD) Solar panel and data logger Strain, temperature gauges on rails 12

13 Wireless Data Transfer 13

14 Portland Seattle Stockton Bakersfield Mojave Los Angeles Vancouver Klamath Falls Fisher River MP131.6 Spotted Robe MP113 Burnham MP97 Whitefish Bowdoin MP326.5, MP333, MP347 Fowler MP8.5 Minot Macon MP216.5 Needles San Bernardino Salt Lake City Phoenix Billings Reno Jct MP5 M1 & M2 Nacco MP52.8 Bridger Jct Bona MP127.4 Belen Denver Branson MP267.3 Alps MP274.1 Folsom MP28.1 & MP286 El Paso Hettinger Gillette La Junta Texline Mandan Oklahoma Amarillo City Texico Sweetwater Avard Haslet Ft. Worth LSD RAIL LONGITUDINAL FORCE SITES Fargo Arkansas City Tulsa Norris Teague Superior Aitkin MP86.6 Mora MP82.5 Minneapolis/ St. Paul Newcastle MP517.4 M1 Dewey MP492.4 La Crosse Rumford MP455.4 Joder MP437 Marsland MP399Marsland MP4 Sioux City Berea MP376 Alliance York MP58 M2 Galesburg Ravenna Seward MP28.6 Lincoln Tecumseh MP159.4 McCook Superior Armour MP41.3 Machens Kansas City St. Louis Springfield Memphis Chicago Greenwood MP624.5 BazemoreMP664.2 Jasper MP691.7 Dora MP76.9 Birmingham Temple Spring Houston New Orleans 2/23/4 22 HIGH SPEED SITES 22 LSD SITES 23 LSD SITES 14

15 Burnham, Montana - MP97 North Rail Temperature ( F) Hourly Data readings (October 1st - 31st, 23) Longitudinal Force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 15

16 Burnham, Montana - MP97 North Rail Temperature ( F) Hourly Data Readings (November 1st - 3th, 23) Longitudinal Force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 16

17 Burnham, Montana - MP97 North Rail Temperature ( F) Hourly Data Readings (December 1st - 31st, 23) Longitudinal Force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 17

18 Burnham, Montana - MP97 North Rail Temperature ( F) Hourly Data Readings (Janurary 1st - 29th, 24) Longitudinal Force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 18

19 Dora, Alabama - MP76.9 North Rail Temperature ( F) Longitudinal force (lbs) Hourly Data Readings (October 1st - 31st, 23) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 19

20 Dora, Alabama - MP76.9 North Rail Temperature ( F) Hourly Data Readings (November 1st - November 3th, 23) Longitudinal Force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 2

21 Dora, Alabama - MP76.9 North Rail Temperature ( F) Hourly Data Readings (December 1st - 31st, 23) Longitudinal Force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 21

22 Dora, Alabama - MP76.9 North Rail Temperature ( F) Hourly Data Readings (Janurary1st - 3th, 24) Longitudinal force (lbs) Rail Temp Neutral Temp Neutral Temp Average Longitudinal Force 22

23 Rail Neutral Temperature Daily 5 15 deg F shift in Neutral Temp Significant decrease in Rail Neutral Temp Measured (3 to 4 deg F) Both Decrease & some noticeable Increase in Neutral Temp measured with time Daily Neutral Temp change of 1 deg F noted in relay rail before it is installed in track 23

24 Salient System s Rail Stress Module 24

25 Salient New RSM 25

26 PRT - High Speed Longitudinal Force Measurement Marsland, NE 26

27 Train Operation Train Length 115 car Coal Train 18,5 tons 14 car Long Coal Train 22, tons No Significant Longitudinal Force Difference in Train Length Distributed Power (with rear DP units) DP Power increase force 27