Advertisement

Simulation of Falling Object Protective Structure Testing of Earth Moving Equipment Cabin

  • A. GomathinayagamEmail author
  • P. Antony Stephen
  • S. Babu
  • K. Keshava
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 134)

Abstract

Earthmoving equipment operates in different applications like construction and open cast mining where it operates above ground level and underground mining where it operates below ground level. Falling of objects over the operator cabin is one of the major causes of accidents in these machines. Hence, safety frames called falling object protective structure (FOPS) have been used to protect the operators from fatal injury. These protective structures should absorb energy during falling of heavy objects over operator cabin. FOPS should meet the requirements specified in ISO 3449. This standard demands the full scale destructive testing to assess its compliance which can be expensive and time consuming. Also, it forbids the use of analytical methods alone to evaluate the cabin performance, since there are no proven researches for the inelastic behavior of the structures. However, a nonlinear explicit dynamic technique has been used to simulate FOPS testing using commercial FEA package. The FEA methodology has been improved through several iterations to get a good correlation with the experimental results. In future, this improved FEA approach will be used to finalize the FOPS design prior to full scale destructive testing to minimize the number of prototype and thereby reduce the development time and cost.

Keywords

Falling object protective structure Cabin Finite element analysis Safety 

Notes

Acknowledgements

Authors wish to thank the management of Larsen & Toubro Limited for the use of their Front End Loader FOPS Cabin data and granting permission to publish this article. They also thank their colleagues for their assistance in carrying out the experimental work.

References

  1. 1.
    Yamagata, K., Tsumura, D.: Introducing a simulation of a cab protecting operator during rolling over of a hydraulic excavator. Komatsu Technical Report, vol. 52, no. 158 (2006)Google Scholar
  2. 2.
    Noguchim, T., Itoh, T.: Production technology of ROPS cab. Komatsu Technical Report, vol. 54, no. 161 (2008)Google Scholar
  3. 3.
    Clark, B.: The behaviour of roll over protective structure subjected to static and dynamic loading conditions. Doctoral Thesis, Department of Civil Engineering, Queensland University (Nov 2005)Google Scholar
  4. 4.
    ISO 3471: 2008, Earth-moving machinery—Roll-over protective structures—Laboratory tests and performance requirementsGoogle Scholar
  5. 5.
    ISO 3449: 2205, Earth-moving machinery—Falling-object protective structures—Laboratory tests and performance requirementsGoogle Scholar
  6. 6.
    Karliński, J., Rusiński, E., Smolnicki, T.: Protective structures for construction and mining machine operators. Elsevier J. Autom. Constr. 17, 232–244 (2008)CrossRefGoogle Scholar
  7. 7.
    Thambiratnam, D.P., Clark, B.J., Perrera, N.J.: Performance of a roll over protective structure for a bulldozer. J. Eng. Mech. 135(1), 31–40 (2009)CrossRefGoogle Scholar
  8. 8.
    Hunckler, C., Purdy, R., Austin, R.: Nonlinear analysis of the Terex scraper rollover protective cab. SAE Technical Paper 850788,  https://doi.org/10.4271/850788 (1985)
  9. 9.
    Kim, T.H., Reid, S.R.: Multiaxial softening hinge model for tubular vehicle roll-over protective structures. Int. J. Mech. Sci. 43, 2147–2170 (2001)CrossRefGoogle Scholar
  10. 10.
    Svärd, R.: Factors affecting the finite element simulation of a ROPS test of a Volvo cab. Master Thesis, Division of Solid Mechanics, Linköping University (Jan 2007)Google Scholar
  11. 11.
    Omanal, A.R., Vasanth Kumar, K.L., Manjunatha, L.H.: Falling object protective structure (FOPS) analysis for excavator cabin. IJTRE 3(10), 2633–2636 (2016)Google Scholar
  12. 12.
    Pardeshi, V.: Redesign of fall over protective structure (FOPS) for operator cabin roof as per EU norms. IJRITCC 3, 4842–4844 (2015)Google Scholar
  13. 13.
    Zhanga, X., Zangb, M., Liuc, X.: The finite element analysis of FOPS for the loader. Key Eng. Mater. 467–469, 1616–1620 (2011)CrossRefGoogle Scholar
  14. 14.
    Kaneda, S., Tamagawa, T.: Introduction of simulation of falling object protective structures. Komatsu Technical Report, vol. 49, no. 151 (2003)Google Scholar
  15. 15.
    Gomathinayagam, A., Antony Stephen, P., Prabhakaran, K., Suresh, R.: Simulation of roll over protective structure testing of earth moving equipment cabin. In: Chakrabarti, A., Chakrabarti, D. (eds.) Research into Design for Communities, Vol. 1. ICoRD 2017. Smart Innovation, Systems and Technologies, Springer, Singapore, Vol. 65, pp. 317–326CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • A. Gomathinayagam
    • 1
    Email author
  • P. Antony Stephen
    • 1
  • S. Babu
    • 1
  • K. Keshava
    • 1
  1. 1.Product Development CenterLarsen & Toubro LimitedCoimbatoreIndia

Personalised recommendations