Development of a Finite Element Model for Evaluating Torsional Stiffness of the Frame of a Large Truck

대형트럭 프레임의 비틀림 강성 평가를 위한 유한요소 모델 개발

  • 오재윤 (전북대학교 기계항공시스템공학부) ;
  • 문일동 (타타대우상용차(주))
  • Published : 2005.04.01


This paper develops a finite element model of a cabover type large truck. The finite element model is for evaluating torsional stiffness of the frame of the large truck. The torsional test of the frame is conducted in order to validate the developed finite element model. A load cell is used to measure the load applied to the frame. An angle sensor is used to measure the torsional angle. An actuator is used to apply a load to the frame. A vertical upward load and a vertical downward load are applied to the frame in the torsional test. The frame's torsional stiffness is computed with the measured load and torsional angle in the torsional test. The finite element model of the large truck includes cab, deck and payload, suspension, and tire. Cab, deck, and suspension are modeled not to affect the frame's torsional stiffness. The simulation is performed with the developed finite element model for evaluating the frame's torsional stiffness. The simulation results show a very good correlation with the torsional test results in the tendency of changing of the frame's torsional stiffness not only with the direction of the applying load but also with the amount of the applying load. In addition, the simulation results predict the measured torsional stiffness of the frame with about $5{\%}$ error.


Finite Element Model;Frame;Large Truck;Torsional Angle;Torsional Stiffness;Torsional Test


  1. Moon, I. D. and Oh, C. Y., 2003, 'Development of a Computer Model of a Large-sized Truck Considering the Frame as a Flexible Body,' Trans. of KSAE, Vol. 11, No. 6, pp.197-204
  2. Lim, J. H., Sung, H. S. and Im, S. Y., 2004, 'Analysis of a Dynamic Rig Test Model for Truck Chassis Systems,' Trans. of KSAE, Vol. 12, No. 4, pp. 94-100
  3. Kim, J. G, Park, S. S., Kim, Y. Y., Choi, S. H. and Kim, B. K., 1996, 'Finite Element Modeling and Experimental Verification of the Structures with Bolted Joints,' Trans. of KSME(A), Vol. 20, No. 6, pp.1854-1861
  4. Kim, B. G, Chung, T. J., Lee, J. K. and Hur, D. J., 2000, 'A Study on the Improvement of Finite Element Model for Scaled Frame by Considering Eigenvectors and Eigenvalues,' Trans. of KSNVE, Vol. 10, No. 6, pp.l009-1016
  5. McNitt, L. F., 1969, 'Truck Frame Side Rail Bulking Stresses,' SAE Paper 690176
  6. MSC/NASTRAN User's Manual, 1994, MacNeal-Schwendler Corporation, USA
  7. F, Pessl, R, Steninwender, 1996, 'FE-Analysis of the DAEWOO 19 Ton Truck Frame 8x4 Dump,' SteyrDaimler-Puch