Analysis of Bicycle Cushion System by using Repulsive Force of Magnetics

영구자석의 척력을 이용한 자전거 완충장치 해석

  • Received : 2015.10.06
  • Accepted : 2015.12.08
  • Published : 2016.02.28


One commercial package for magnetic analysis was used to apply repulsive forces of permanent magnetics to bicycle cushion system. Reliabilities of finite element analysis were acquired by comparing with those of experimental measurements. Equivalent spring stiffnesses corresponding to various sizes of magnetics were implemented into the bicycle dynamic model with three degree of freedom. Input force caused at front and rear wheels due to road unevenness was considered in the dynamic model. Dynamic behaviors were observed in terms of vertical displacements of the rider and the front reach as well as pitching displacement of the mass center when the bicycle ran over half-triangular bump. The methodology suggested in this paper by the finite element analysis and numerical model will be an useful tool for more accurate prediction of cushion design for any vehicle system if magnetic forces are utilized.


magnetic force;cushion equipment;bicycle dynamic model


  1. Ansys Workbench (2015) ANSYS, Inc., USA.
  2. Cossalter, V., Doria, A., Garbin, S., Lot, R. (2006) Frequency-Domain Method for Evaluating the Ride Comfort of a Motorcycle, Veh. Sys. Dyn., pp.339-355.
  3. Hughes, T.J.R. (1987) Finite Element Method, Prentice-Hall, pp.109-184.
  4. Ogata, K. (2014) System Dynamics, Pearson, pp.173-254.
  5. Waechtr, M., Riess, F., Zacharias, N. (2002) A Multibody Model for the Simulation of Bicycle Suspension Systems, Veh. Sys. Dyn., pp.3-28.
  6. Yoon, H.M., Yun, S.H., Goo, C.G. , Lee, S.H. (2015) Analysis for Determination of Permanent Magnetic Size Applicable to Bicycle Spring System, Proceedings of the KSMPE Autumn Conference (to be printed).

Cited by

  1. An Observation of the Application of a Magnetic Force to the Bicycle Cushion System and its Nonlinearity vol.17, pp.1, 2018,


Supported by : 금오공과대학교