Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Design of Nonlinear Shock Absorber with Magnetic Eddy Current Damper for Sequential Impact

Authors
Abbas Assadi 1
Leila Hashemi 2
1 Assistant Professor, Faculty of Mechanics, Malek Ashtar University of Technology
2 M.Sc., Faculty of Mechanics, Malek Ashtar University of Technology
10.30506/ijmep.2022.554103.1881
Abstract
In this article, considering the existing limitations in changing the length of the linear spring and, on the other hand, the ability to design and manufacture a suitable damper element and nonlinear spring in energy absorbers, the design of a mass and a nonlinear spring with a magnetic eddy current damping element for use in sequential shock excitation has been proposed. In this mechanism, the nonlinear spring and damping element is designed respectively using a telescopic mechanism consisting and neodymium magnet. The nonlinear dynamic equation of the problem is solved using Rong-Kota 4th order and Newmark beta numerical methods. The results show that by selecting the appropriate length of the telescopic arm, in addition to ensuring the convergence of the results, the energy lost can be increased several times compared to the linear mechanism.
Keywords
Shock absorber design
Nonlinear spring and mass mechanism
Magnetic damper
Sequential shock
Increased energy loss

Subjects

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  • Receive Date 20 May 2022
  • Revise Date 17 September 2022
  • Accept Date 26 September 2022