OTPA diagnostics with vibration and noise measurement on next high-speed railway train

1. INTRODUCTION OF
KOREAN HIGH SPEED TRAIN
2007. 7. 24
ROTEM Company
OTPA Diagnostics
Vibration & Noise Measurement
Application :
Design Verification for High Speed Railway Train
Solicited in S. Korea governmental procurement for high-speed train vibration measurement and OTPA project
FODS Co.
Duancan Bldg Suite #501, Achasan-ro 3, Seungdong-gu, Seoul, Korea
TEL: +82-2-6954-7956 FAX: +82-2-6954-7957
Company for Operational Transfer Path Analysis (OTPA)

2. 22 2017.12
OTPA Diagnostics is essential for SOC safety
JAPAN’s Transport Safety Board has launched an investigation after bogie cracks and an oil leak were discovered on a West Japan
Railway Company (JR West) N700 Series Shinkansen train while operating a Hakata – Tokyo Nozomi service on December 11.
Accident of Shinkansen
Highspeed Railway Train
in Japan

3. Applications for OTPA Diagnostics
1.LargeScaleVibration&SoundMeasurement
 High-Speed Train Safety Diagnostics
 Rotating Machine Precision Diagnostics
 Car & Airplane Design Improvement
 High-Precision Plant Diagnostics
 Geophysics-Based Construction Assessment
 Equipment Environment Effect Assessment
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2.SourceIdentificationUsingOTPADiagnostics

4. Large Scale Vibration Measurement for OTPA

5. Identifying Vibration Sources in X-Highspeed Train

6.  Requirement 1 : modifying the Y support frame to reduce the vertical vibration level and increasing the absorbing
performance of the X suspension component to prevent crack initiation in the Y support frame
 Requirement 2 : reducing the lateral vibration level of the front K support frame and replacing of the front W suspension
component to increase readability and noise abatement
- Low-frequency-band vibration level of the right cabin floor has the contributions from the component XXX with 9 percentage
and from the component YYY with 7 percentage, and has less contribution from the component ZZZ as the speed of the railway
train increases
- High-frequency-band vibration level of the aft bogie vertical damper has the contribution from the component XXX with 10
percentage and has less contribution from the component YYY and new contributions from the component ZZZ and TTT as the
speed of the railway train increases
OTPA Diagnostics of HEMU (S. KOREA X-430KPH Railway Train)
Service for Vibration Testing & OTPA Diagnostics
[Assessment Example ]
[Requirement Example ]