Effect of Suspension System Stiffness on Dynamic Load Action Chassis Multi-purpose Forest Fire Fighting Vehicle

Document Type : Original Article


Vinh Long University of Technology Education, 73, Nguyen Hue street, Vinh Long city, Vietnam


Multi-purpose forest fire fighting vehicles include a combination of fire fighting equipment such as a high-pressure water pump, create corridor fire insulation cutting machine, vacuum and high wind speed bowling machine, extinguish the fire sandblast apparatus that is mounted on the URAL 4320 active three axles vehicle. When installing fire fighting equipment on vehicles, increases the load, affecting the vehicle's load distribution, angularity, and stability. Therefore, to ensure structural rigidity, the suspension system is redesigned to increase rigidity. However, alteration of the suspension stiffness will change the dynamic load acting on the chassis. This research presents the results of research on the influence of suspension stiffness on dynamic loads acting on the chassis of a multi-purpose forest fire fighting vehicle. The survey results showed that an increasing the suspension stiffness will increase the dynamic load acting on the chassis, and reduce the durability of the chassis in particular and the details of the vehicle in general. The research outcomes are the basis for evaluating the working life of the chassis in subsequent studies.


Main Subjects

  1. Duong, T., "Research technology and design and manufacture specialized equipment for forest fire fighting", National scientific and Technological Topics KC07, Vol. 13, (2010), 06-10.
  2. Vạn, L.V., "Effect of suspension system stiffness to dynamic load action chassis multi-purpose forest fire fighting vehicle", International Journal of Engineering, Transactions B: Applications, Vol. 35, No. 8, (2022), doi: 10.5829/IJE.2022.35.08B.13.
  3. Nguyen, X., "Research dynamics of multi-purpose forest fire fighting vehicle", Doctoral thesis Technology, Vietnam National University of Forestry, (2013),
  4. Tung, N., Van, L. and Quang, N., "A survey on the effects of bumpy road on the vibration of multi-purpose forest fire fighting vehicle", Engineering Solid Mechanics, Vol. 9, No. 3, (2021), 291-298, doi: 10.5267/j.esm.2021.3.001.
  5. Mitschke, M. and Wallentowitz, H., "Dynamik der kraftfahrzeuge, Springer, Vol. 4,  (1972).
  6. Thanh Tung, N., "Experimental analysis for determination of longitudinal friction coefficient function in braking tractor semi-trailer", International Journal of Engineering, Transactions A: Basics, Vol. 34, No. 7, (2021), 1799-1803, doi: 10.5829/ije.2021.34.07a.24.
  7. Xu, H., He, L. and An, D., "Study on the vehicle dynamic load considering the vehicle-pavement coupled effect", in IOP Conference Series: Materials Science and Engineering, IOP Publishing. Vol. 269, (2017), 012001.
  8. Tung, N.T. and Van, L.V., "A study on the effects of tire vertical stiffness on dynamic load of dvm 2.5 truck", in International Conference on Engineering Research and Applications, Springer. (2021), 128-134.
  9. Davis, L. and Bunker, J., "In-service testing of heavy vehicle suspensions-background report for the ntc project", (2008).
  10. Andreasson, N.P.J., Woodruff, M.G.A. and Modelon, A., "Heavy vehicles modeling with the vehicle dynamics library", (2008).
  11. Szurgott, P., Kwasniewski, L. and Wekezer, J.W., "Dynamic interaction between heavy vehicles and speed bumps", in ECMS., (2009), 585-591.
  12. Tianjun, Z. and Changfu, Z., "Modelling and active safe control of heavy tractor semi-trailer", in 2009 Second International Conference on Intelligent Computation Technology and Automation, IEEE. Vol. 2, (2009), 112-115.
  13. Davis, L. and Bunker, J., "Heavy vehicle suspension testing and analysis-dynamic load sharing", (2009).
  14. Li, L., Song, J., He, L., Zhang, M. and Li, H., "Life prediction based on transient dynamics analysis of van semi-trailer with air suspension system", Chinese Journal of Mechanical Engineering-English Edition, Vol. 24, No. 3, (2011), 372.
  15. Elischer, M. and BRUZSA, L.L., "Dynamic wheel loads of heavy vehicles–preliminary analysis", ARRB Group Ltd Australia, (2012).
  16. Misaghi, S., Nazarian, S. and Carrasco, C., "Impact of truck suspension and road roughness on loads exerted to pavements", The University of Texas, FHWA, El Paso, (2010).
  17. Nguyen, T.Q., Le, H.Q., Tran, P.H., Nguyen, X.H. and Van, T.T., "Determination of dynamic loads from the road surface acting on the chassis by experimental methods", in IOP Conference Series: Materials Science and Engineering, IOP Publishing. Vol. 886, (2020), 012008.