Influence factor analysis on the measurement of smoke density from floor materials in rolling stock

철도차량 바닥재 연기밀도 측정의 영향인자분석

  • Kwon, Tae-Soon (Railroad Safety Research Division, Korea Railroad Research Institute) ;
  • Lee, Duck-Hee (Railroad Safety Research Division, Korea Railroad Research Institute) ;
  • Park, Won-Hee (Railroad Safety Research Division, Korea Railroad Research Institute)
  • 권태순 (한국철도기술연구원 철도안전연구실) ;
  • 이덕희 (한국철도기술연구원 철도안전연구실) ;
  • 박원희 (한국철도기술연구원 철도안전연구실)
  • Received : 2016.08.02
  • Accepted : 2016.11.10
  • Published : 2016.11.30


In this study, we investigated the effect of factors that influence the measurement of smoke density using synthetic rubber flooring. The characteristics of rolling stock in an enclosed environment can cause enormous loss of life by smoke inhalation during fires inside passenger cars. The amount of smoke generation from interior materials for rolling stock is strictly restricted domestically and in other countries. Precise measurement of smoke density is therefore required to assess the fire performance of interior materials. Major factors that influence the measurement of smoke density include the uniformity of the specimen, the variations in conditions and instruments, and the operational and maintenance environment of the instruments. The contribution of factors was analyzed by estimating the uncertainty to investigate the contribution ratios of the major factors. The results show a contribution ratio of about 86% for the variation from the measurement of light transmission using a photomultiplier tube. Thus, this factor was the most representative for the measurement of smoke density. The contribution ratio of the other factors was low at about 11%, including irradiant flux conditions (${\pm}0.5 kW/m^2$) and the influence of the operational and maintenance environment of the instrument. These results were obtained using specimens with high uniformity.


floor materials;influence factor analysis;rolling stock;smoke density;uncertainty estimation


Supported by : 한국철도기술연구원


  1. G. W. Mulholand, E. L. Johnsson, M. G. Fernandez, D. A. Shear, "Design and Testing of a New Smoke Concentration Meter," Fire and Materials, vol. 24, no. 5, pp. 231-243, 2000. DOI: 231::AID-FAM743>3.3.CO;2-E<231::AID-FAM743>3.0.CO;2-N
  2. J. Tissot, M. Talbaut, J. Yon, A. Coppalle, A. Bescond, "Spectral Study of the Smoke Optical Density in Non-flaming Conditionl," Procedia Engineering, Vol. 62, pp. 821-828, 2013. DOI:
  3. International Organization for Standardization, Guide to the expression of uncertainty in measurement (GUM), 1995.
  4. Korea Laboratory Accreditation Scheme, Guide to the estimation and expression in measurement, 2016.
  5. Ministry of Land, Infrastructure and Transport, Technical specifications for railway vehicles, 2016.
  6. British Standards Institution, Railway applications -Fire protection on railway vehicles : Part 2: Requirements for fire behaviour of materials and components (BS EN 45545-2), 2013.
  7. T. S. Kwon, W. H. Park, "The Study on the Operation of Fire Fighting Vehicle for a Long Railway Tunnel," Journal of the Korea Academia-Industrial Cooperation Society, vol. 17, no. 5, pp. 516-521, 2016. DOI:
  8. International Organization for Standardization, Plastics -Smoke generation - Part 2: Determination of optical density by a single-chamber test (ISO 5659-2), 2012.
  9. American Society for Testing and Materials, Standard Test Method for Specific Optical Density of Smoke Generated by Solid Materials (ASTM E662), 2015.
  10. M. Y. Choi, G. W. Mulholand, A. Hamins, T. Kashiwagi, "Comparison of the Soot Volume Fraction using Gravimetric and Light Extinction Technique," Combustion and Flame, vol. 102, no. 1-2, pp. 161-169, 1995. DOI: