International Journal of Vehicle Structures and Systems

Open Access Open Access  Restricted Access Subscription Access

Gradient Load Evaluation of Chassis Frame Mounted Specialised Structure Designed for Heavy Off-Road Vehicles


Affiliations
1 Marathwada Mitra Mandal College of Engg., Pune, India
 

   Subscribe/Renew Journal


Chassis mounted structures provide a levelled base to the transport vehicles intended for on-road and off-road driving. These structures acts as cushioning elements to sophisticated cargos like intelligent tracking systems placed in shelters closed environment. These structures need sufficient strength and rigidity to withstand the load variations arising from tire-road interactions during rough road travel. Such structures need special attention during the design phase itself in order to improve the specified payload carrying capacity with optimized dimensions. Present paper focuses on formulation of a specialized structure mounted on chassis intended to carry shelters. A scaled prototype is manufactured and tested for different grade-load combinations. This is done through experimental strain measurement and analysis of the results. The data is acquired for nine different load magnitudes and is categorised into three sets as low, moderate and high magnitudes. Interrelation between the stress/strain values acquired during each load and gradient state is developed. The structure behaviour is hypothesized through the gradient strain measurement outcomes. Major design concerns include the spacing and orientation of cross-members, load locations on the structure and the road profiles. Cross-country and rough road terrain behaviour of the structure is attempted in present work.

Keywords

Terrain Vehicles, Structure Design, Intense Loads, Levelled Bases, Gradient Loads.
User
Subscription Login to verify subscription
Notifications
Font Size

  • B.A. Gombar. 2006. Design and Evaluation of a Mobile Instrumentation Platform for Unmanned Vehicle Testing, ME Thesis, Virginia Polytechnic Institute and State University, Virginia.

  • K. Senthilkumar, M. Chidanand, P. Nijalingappa and M.M. Shivhare. 2010. Design development and validation of a vehicle-mounted hydraulically leveled platform, J. Defence Science, 60(02), 169-177. http://dx.doi.org /10.14429/dsj.60.336.

  • L. Yu and T. Yin. 2010. Damage identification in frame structures based on FE model updating, ASME J. Vibration and Acoustics, 132(5), 1-13. http://dx.doi.org/10.1115/1.4002125.

  • T.R. Lin and J. Pan. 2009. Vibration characteristics of a Box type Structure, ASME J. Vibration and Acoustics, 131(3), 1-9. http://dx.doi.org/10.1115/1.3025831.

  • S.A. Nasar and X. Yang. 2009. Mathematical model for vibration-induced loosening of preloaded threaded fasteners, ASME J. Vibration and Acoustics, 131(2), 1-13. http://dx.doi.org/10.1115/1.2981165.

  • L. Li, J. Song, L. Kong and Q. Hunag. 2009. Vehicle velocity estimation for real-time dynamic stability control, KSAE Int. J. Automotive Technology, 10(6), 675-685. http://dx.doi.org/10.1007/s12239-009-0080-7.

  • B.S. Kim, M. Spiryagin, B.S. Kim and H.H. Yoo. 2009. Analysis of the effects of main design parameters variation on the vibration characteristics of a vehicle sub-frame, J. Mechanical Science and Technology, Springer, 23(4), 960-963. http://dx.doi.org/10.1007/s12206-009-0321-8.

  • C.G. Kang. 2007. Analysis of braking system of Korean high-speed train using real time simulations, J. Mechanical Science and Technology, Springer, 21(7), 1048-1057. http://dx.doi.org/10.1007/BF03027654.

  • V.R. Deulgaonkar. 2016. Vibration measurement and spectral analysis of chassis frame mounted structure for off-road wheeled heavy vehicles, Int. J. Vehicle Structures & Systems, 8(1), 234-240. http://dx.doi.org/10.4273/ijvss.8.1.05.

  • G.H. Kim, K.Z. Cho, I.B. Chyun and G.S. Choi. 2003. Dynamic stress analysis of a vehicle frame using a nonlinear finite element method, KSME Int. J., 17(10), 1450-1457.

  • V.R. Deulgaonkar & A.G. Matani. 2014. Development and validation of chassis mounted platform design for heavy vehicles, Int. J. Vehicle Structures & Systems, 6(3), 51-57. http://dx.doi.org/10.4273/ijvss.6.3.02.

  • V.R. Deulgaonkar, A.G. Matani & S.P. Kallurkar. 2012. Mathematical analysis of section properties of a platform integrated with vehicle chassis, Int. J. Scientific and Research Publications, 2(1), 87-90.

  • V.R. Deulgaonkar & A.G. Matani. 2013. Experimental investigation of inimitable platform on heavy vehicle chassis, Int. J. Automobile Engg. Research & Development, 3(3), 7-12.

  • V.R. Deulgaonkar & A.G. Matani. 2013. Strain characteristics in a unique platform integrated with truck chassis under intense load, Int. J. Mechanical and Production Engg. Research and Development, 3(3), 83-88.

  • V.R. Deulgaonkar, A.G. Matani & S.P. Kallurkar. 2012. Advanced mathematical analysis of chassis integrated platform designed for unconventional loading by using simple technique for static load, Int. J. Engg. and Innovative Technology, 1(3), 26-28.

  • V.R. Deulgaonkar, A.G. Matani, S.P. Kallurkar & D.K. Chavan. 2012. Noise and vibrations mechanics: review and diagnostics, Int. J. Applied Engg. Research, 7(1), 71-78.

  • V.R. Deulgaonkar, A.G. Matani & S.P. Kallurkar. 2015. Design evaluation of chassis mounted platform for off-road wheeled heavy vehicles, Int. J. Vehicle Structures & Systems, 7(3), 55-59. http://dx.doi.org/10.4273/ijvss.7.3.03.

  • V.R. Deulgaonkar & A.G Matani. 2013. Mechanics of strain propagation in members of a platform structure devised for intense load, Int. J. Mechanical Engg., 2(4), 29-34.

  • V.R. Deulgaonkar, A.G. Matani & S.P. Kallurkar. 2013. An investigation of structural integrity of chassis mounted platform subjected to concentrated load during braking, Int. J. Mechanical Engg. and Technology, 4(1), 115-122.

  • V.R. Deulgaonkar. 2016. Vibration measurement and spectral analysis of chassis frame mounted structure for off-road wheeled heavy vehicles, Int.J.Vehicle Structures &Systems;, 8(1), 22-27. http://dx.doi:10.4273/ijvss.8.1.05.

  • V.R. Deulgaonkar, A.G. Matani & S.P. Kallurkar. 2015. Experimental strain measurement of chassis mounted structure, Proc. 17th ISME Conf. Advances in Mechanical Engg., Indian Institute of Technology, Delhi, India.

  • C. Sujatha and V. Ramamurti. 1990. Bus vibration study- theoretical response analysis and experimental verification, Int. J. Vehicle Design, 11(4-5), 401-409.


Abstract Views: 257

PDF Views: 144




  • Gradient Load Evaluation of Chassis Frame Mounted Specialised Structure Designed for Heavy Off-Road Vehicles

Abstract Views: 257  |  PDF Views: 144

Authors

Vikas Radhakrishna Deulgaonkar
Marathwada Mitra Mandal College of Engg., Pune, India

Abstract


Chassis mounted structures provide a levelled base to the transport vehicles intended for on-road and off-road driving. These structures acts as cushioning elements to sophisticated cargos like intelligent tracking systems placed in shelters closed environment. These structures need sufficient strength and rigidity to withstand the load variations arising from tire-road interactions during rough road travel. Such structures need special attention during the design phase itself in order to improve the specified payload carrying capacity with optimized dimensions. Present paper focuses on formulation of a specialized structure mounted on chassis intended to carry shelters. A scaled prototype is manufactured and tested for different grade-load combinations. This is done through experimental strain measurement and analysis of the results. The data is acquired for nine different load magnitudes and is categorised into three sets as low, moderate and high magnitudes. Interrelation between the stress/strain values acquired during each load and gradient state is developed. The structure behaviour is hypothesized through the gradient strain measurement outcomes. Major design concerns include the spacing and orientation of cross-members, load locations on the structure and the road profiles. Cross-country and rough road terrain behaviour of the structure is attempted in present work.

Keywords


Terrain Vehicles, Structure Design, Intense Loads, Levelled Bases, Gradient Loads.

References





DOI: https://doi.org/10.4273/ijvss.8.2.05