• Home
  • Evaluation of Sperling’s Index in Passenger and Freight Trains Under Different Speeds and Track Irregularities

Share To

Article Url


Manuscript ID : ADMT-2207-1367 (R1) Visit : 121 Page: 85 - 94

10.30486/admt.2023.1963242.1367

Article Type: Original Research

Evaluation of Sperling’s Index in Passenger and Freight Trains Under Different Speeds and Track Irregularities

Subject Areas : dynamics

sajjad  sattari 1 (Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran)
Mohammad  Saadat 2 (Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran)
Sayed Hasan  Mirtalaie 3 (Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran)
mahdi  salehi 4 (Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran)
ali  soleimani 5 (Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran)

Received: 2022-07-13 Accepted : 2022-09-25 Published : 2022-12-01

Keywords: Ride quality, Railway vehicles, Ride comfort, Track irregularities, Sperling’s index, numerical simulation,

Abstract :

The two factors of track irregularity and train speed affect the dynamic behavior of rail vehicles and can lead to an increase in dynamic forces, a decrease in ride comfort, and derailment in some cases. In this paper, the effect of train speed increase and different conditions of track irregularity on ride comfort and ride quality are investigated. For this purpose, first, two freight and passenger train models have been modeled in UM software, and then the effect of train speed increase and track irregularities (different US federal classes) have been studied with Sperling’s index. A freight train with the model of 18-100 and 3-piece bogie and a TGV high-speed train with 10 wagons were simulated. The results showed that in Sperling’s index, with the increase in the train speed and irregularity amplitude, the value of ride comfort and ride quality generally increased. For example, in the passenger train and irregularity classes 5 and 4, with the increase in train speed from 10 to 100 m/s, the Sperling’s index values changed from 0.66 to 1.99 and from 0.78 to 2.25, and increased 200% and 188%, respectively. In other words, at a speed of 10 m/s, passengers' comfort is just noticeable, while at a speed of 100 m/s and class 4, the situation is more pronounced but not unpleasant and the system should be monitored.

References:


  • Nasr, A., Taheri, M. M. N., and Shahravi, M., Tehran Subway Rolling Stock Dynamic Analysis, Transportation research, Vol. 17, No. 1, 2020, pp. 61-70.
    •
  • Ebadi Rajoli, J., Molatefi, H. A., Analysis of Wagon Vibration and Investigation of Track Irregularities Effect on the Ride Comfort, Quarterly Journal of Transportation Engineering, Vol. 7, No. 2, 2015, pp. 251-261.
    •
  • Dumitriu, M., Stănică, D. I., Study on the Evaluation Methods of the Vertical Ride Comfort of Railway Vehicle—Mean Comfort Method and Sperling’s Method, Applied Sciences, Vol. 11, No. 9, 2021, pp. 3953.
    •
  • Haladin, I., Lakušić, S., and Bogut, M., Overview and Analysis of Methods for Assessing Ride Comfort on Tram Tracks, Građevinar, Vol. 71, 2019, pp. 901-921.
    •
  • Ghazavi, M, Azari Nejad, M, and Rahmanian, S., Dynamic Analysis of the Derailment of High-Speed Railway Vehicle on A Curved Path with Longitudinal Displacement, Modares Mechanical Engineering, Vol. 15, No. 5, 2015, 309-318.
    •
  • Jiang, Y., Chen, B. K., and Thompson, C., A Comparison Study of Ride Comfort Indices Between Sperling’s Method and EN 12299, International Journal of Rail Transportation, Vol. 7, No. 4, 2019, pp. 279-296.
    •
  • Younesian, D., Nankali, A., Spectral Optimization of High-Speed Train Suspension Systems, International Journal of Vehicle Structures & Systems, Vol. 1, 2009.
    •
  • Gangadharan, K. V., Sujatha, C., and Ramamurti, V., Experimental and Analytical Ride Comfort Evaluation of a Railway Coach, Mechanical Engg. Deptt., National Institute of Technology Karnataka, Surathkal, 2004.
    •
  • Goga, V., Kľúčik, M., Optimization of Vehicle Suspension Parameters with use of Evolutionary Computation, Procedia Engineering, Vol. 48, 2012, pp. 174-179.
    •
  • Sun, X., Research of Simulation on the Effect of Suspension Damping on Vehicle Ride, Energy Procedia, Vol. 17, 2012, pp. 145-151.
    •
  • Suarez, B., Influence of the Track Quality and of the Properties of the Wheel–Rail Rolling Contact on Vehicle Dynamics, Vehicle System Dynamics, Vol. 51, No. 2, 2013, pp. 301-320.
    •
  • Suarez, B., Assessment of the Influence of the Elastic Properties of Rail Vehicle Suspensions on Safety, Ride Quality and Track Fatigue, Vehicle System Dynamics, Vol. 51, 2012.
    •
  • Vakil Baghmisheh, M. T., Application of Genetic Algorithms in Optimal Design of a Passive Suspension System a Vehicle Subjected to Random Excitations of Actual Road, Modares Mechanical Engineering, Vol. 10, No. 4, 2010, pp. 1-12.
    •
  • Vongierke, H. E. The ISO Standard: Guide for the Evaluation of Human Exposure to Whole-Body Vibration, in NASA. Langley Res. Center The 1975 Ride Quality Symp., 1975.
    •
  • Standardization, I. O. f., Mechanical Vibration and Shock: Evaluation of Human Exposure to Whole-body Vibration, International Organization for Standardization, 1985.
    •
  • Khalid, H., Turan, O., and Bos, J. E., Guide to Measurement and Evaluation of Human Exposure to Whole-Body Mechanical Vibration and Repeated Shock Guide to Measurement and Evaluation of Human Exposure to Whole-Body Mechanical Vibration and Repeated Shock 30, 1987, Journal of Marine Science and Technology, Vol. 16, No. 2, 2011, pp. 214-225.
    •
  • Railways, I. U. O., UIC Code 513, R: Guidelines for Evaluating Passenger Comfort in Relation to Vibration in Railway Vehicles, International Union of Railways, 1995.
    •
  • CEN, E., Railway Applications–Ride Comfort for Passengers–Measurement and Evaluation, Railway Applications-Ride Comfort for Passengers-Measurement and Evaluation, 2009, pp. 12299.
    •
  • Standardization, I. O. f., Mechanical Vibration: Measurement and Analysis of Whole-Body Vibration to Which Passengers and Crew Are Exposed in Railway Vehicles, International Organization for Standardization Geneva, 2001.
    •
  • Sadeghi, J., Rabiee, S., and Khajehdezfuly, A., Effect of Rail Irregularities on Ride Comfort of Train Moving Over Ballast-Less Tracks, International Journal of Structural Stability and Dynamics, Vol. 19, No. 6, 2019, pp. 1950060.
    •
  • Sadeghi, J., Rabiee, S., and Khajehdezfuly, A., Development of Train Ride Comfort Prediction Model for Railway Slab Track System, Latin American Journal of Solids and Structures, Vol. 17, No. 7, 2020, pp. 1-22.
    •
  • Kumar, V., Rastogi, V., and Pathak, P. M., Simulation for Whole-Body Vibration to Assess Ride Comfort of a Low–Medium Speed Railway Vehicle, Simulation, Vol. 93, No. 3, 2017, pp. 225-236.
    •
  • Zakeri, J., Impact of Heavy Urban Rail Vehicles Running Over Light Rail Turnouts, Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, Vol. 235, No. 3, 2021, pp. 300-312.
    •
  • Aziznia, M., Owhadi, A., and Shadfar, M., Analysis of wheel and rail Hertzian and Non-Hertzian Contact Theories Using UM Software Considering the Effect of Rail Inclination on Wheel Wear, International Journal of Railway Research, Vol. 8, No. 2, 2021, pp. 21-32.
    •
  • Kalker, J. J., Three-Dimensional Elastic Bodies in Rolling Contact, Springer Science & Business Media, Vol. 2, 2013.
    •
  • Pogorelov, D., Simulation of Freight Car Dynamics: Mathematical Models, Safety, Wear. 2009.
    •
  • Kovalev, R., Freight Car Models and Their Computer-Aided Dynamic Analysis, Multibody System Dynamics, Vol. 22, 2009, pp. 399-423.
    •
  • Zakharov, S., Computer-Aided Simulation of The Influence of Track and Vehicle Parameters on Wheel/Rail Intraction Characteristics, 2009.
    •
  • Bernal, E., Spiryagin, M., and Cole, C., Onboard Condition Monitoring Sensors, Systems and Techniques for Freight Railway Vehicles: A Review. IEEE Sensors Journal, Vol. 19, No. 1, 2019, pp. 4-24.
    •
  • Yazykov, V., Numerical Simulation of Railway Vehicle Derailments, 2010.
    •
  • Kargarnovin, M. H., Ride Comfort of High-Speed Trains Travelling Over Railway Bridges, Vehicle System Dynamics, Vol. 43, No. 3, 2005, pp. 173-197.
    •
  • Kargarnovin, M. H., Nonlinear Vibration and Comfort Analysis of High-Speed Trains Moving Over Railway Bridges, Vol. 2, 2004.
    •
  • Yang, H., Z. Chen, and Zhang, H., Vibration of Train-Rail-Bridge Interaction Considering Rail Irregularity with Arbitrary Wavelength, International Journal of Engineering, Vol. 28, No. 4, 2015, pp. 516-522.
    •
  • Au, F., Wang, J., and Cheung, Y., Impact Study of Cable-Stayed Railway Bridges with Random Rail Irregularities, Engineering Structures, Vol. 24, No. 5, 2002, pp. 529-541.
    •

 

 

Related articles

The rights to this website are owned by the Raimag Press Management System.
Copyright © 2021-2024

Home| Login| About Us| Contact Us|
[فارسی] [العربية] [fa] [ar]