Journal of the Korea Convergence Society (한국융합학회논문지)

Korea Convergence Society (한국융합학회)
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The Running Vibration Assessment of Daegu Metropolitan Transit using Smartphone Acceleration Sensor

스마트폰 가속도센서를 이용한 대구도시철도 주행진동평가

  • Kwon, Dong-Hee (Department of Civil Engineering, Keimyung University) ;
  • Jang, Sung-Hyun (Department of Civil Engineering, Keimyung University) ;
  • Mun, Hyung-Jin (Dept. of Information & Communication Engineering, Sungkyul University) ;
  • Chey, Min-Ho (Faculty of Architecture & Civil Engineering, Keimyung University)
  • 권동희 (계명대학교 토목공학과) ;
  • 장성현 (계명대학교 토목공학과) ;
  • 문형진 (성결대학교 정보통신공학부) ;
  • 최민호 (계명대학교 건축토목공학부)
  • Received : 2019.05.04
  • Accepted : 2019.06.20
  • Published : 2019.06.28
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Abstract

Recently, various problems have arisen due to the popularization and aging of urban railway transit, which is the key transportation of large cities. In this study, the vibrational accelerations for the Daegu Metropolitan City Urban Railway(Line 1) were measured and evaluated using the smartphone built-in acceleration sensor and the approved application. For this purpose, the three axes running accelerations were measured according to the domestic standard (KS R 9160), and the acceleration data along the 32 stations (3 directions) were analyzed and compared. In addition, the increasing of acceleration values caused by the change of vibrational environment was monitored along the main stations between the time in 1997 and 2017. It was found that there are considerable increase of lateral and vertical directional accelerations due to the aging of railway facility environment for the last 20 years. The results of this study have valuable means for evaluating the ride quality of urban railway and the vibration influence on surrounding structures.

최근 대도시 핵심 교통수단인 도시철도의 대중화와 노후화에 따른 다양한 문제점이 발생되고 있다. 본 연구에서는 이의 해결을 위해 스마트폰 내장형 가속도센서와 이를 활용한 애플리케이션을 사용하여 대구광역시 도시철도 1호선 전 구간에 대한 진동가속도를 측정하고 열차진동 특성을 평가하였다. 이를 위해 국내 철도차량 진동 측정 방법(KS R9160)을 따라 주행 시 발생하는 3축 방향 가속도를 기반으로, 32개 역사 구간 및 방향 별 진동가속도 특성을 분석하였다. 또한, 1997년 개통 당시 측정된 주요 구간 진동가속도와의 비교를 통해 열차 진동환경 변화에 따른 진동증폭 양상을 모니터링하였다. 진동가속도 분석 결과, 20년에 걸친 철도시설 환경의 노후화에 따른 수평 및 수직 방향 진동가속도 증가 특성을 확인하였다. 본 연구의 결과는 추후 도시철도 승차감 평가와 주변 구조물에 대한 진동영향성 평가를 위한 주요한 자료로서의 가치가 있을 것으로 판단된다.

Keywords

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Fig. 1. Acceleration measurement axes

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Fig. 2. Double amplitude of acceleration

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Fig. 3. Train type[1]

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Fig. 4. Accelerometer detection points

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Fig. 5. Physics Toolbox Suite Pro[10]

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Fig. 6. Acceleration results through the 13th to 18th stations (3 axes)

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Fig. 7. Acceleration results of the one section (the 16th to 17th stations, 3 axes)

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Fig. 8. Acceleration properties in the years of 1997 and 2017 (Y-axis)

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Fig. 9. Acceleration properties in the years of 1997 and 2017 (Z-axis)

Table 1. Daegu metropolitan transit line 1 status[1]

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Table 2. Train function [1]

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