Track Figure 1


0.15 0.10 0.05 0.00 -0.05 -0.10 -0.15 -0.20


0


25.00 20.00 15.00 10.00 5.00 0.00 -5.00 -10.00 -15.00 -20.00


0 500 1000 Left alignment 1500 Distance (m) Right alignment Gauge Curvature


ability of Nucars and PBTG to properly predict vehicle performance and ride quality and to identify track geometry locations that need maintenance using the initial ride quality measurements and the measured track geometry inputs.


TTCI partnered with Dallas Area 2000 2500 500 1000 1500 Distance (m) Lateral acceleration Speed


16 14 12 10 8 6 4 2 0


-2 3000 2000 2500


120 100 80 60 40 20 0


-20 3000 Figure 2


0.07 0.06 0.05 0.04 0.03 0.02 0.01 0.00


0.06 0.05 0.04 0.03 0.02 0.01 0.00


1Hz content in lateral alignment


0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 Frequency (Hz)


Track geometry


Vehicle response 1Hz, 1.63Hz


0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 Vehicle response


Frequency (Hz)


Rapid Transit (Dart) to carry out this research, with Dart providing a test vehicle for TTCI to perform characterisation and ride quality tests. All testing was performed on the Dart light rail network which has a variety of track structures and a wide range of operating speeds.


Dart’s Kinki Sharyo super light rail vehicle (SLRV), which has three sections and can accommodate up to 150 seated and standing passengers, was selected and fully characterised for testing. The data obtained from the characterisation studies was used to develop a Nucars model representing the vehicle, while


38


IRJ August 2012


Alignment/gauge (mm)


Lateral accelerations (g)


Curvature (deg)


Speed (km/h)


Magnitude


Magnitude


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