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Monday, July 8 • 17:30 - 17:50
STUDY OF A NOVEL TORSION QUASI-ZERO-STIFFNESS VIBRATION ISOLATOR USING MAGNETIC SPRING BASED ON MAXWELL NORMAL STRESS

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Torsional vibration phenomena are common in the rotor system of automobile, navigation and aerospace. To suppress the adverse effects caused by torsional vibration, a torsion quasi-zero-stiffness vibration isolator (TQZS-VI) is proposed in this paper, which is composed in parallel structure with a rubber bearing and a torsion magnetic spring (TMS). The TMS produces the negative stiffness to counteract the positive stiffness provided by the rubber bearing. Firstly, the magnetic torque expression is given according to the principle of Maxwell normal stress, and the torsion magnetic stiffness of the proposed vibration isolation system is obtained. The characteristics of the torsion magnetic stiffness is numerically analyzed by finite element simulations. Then, the influence of TMS geometric parameters on the magnetic torque and stiffness are analyzed. Finally, the vibration isolation characteristics analysis and numerical simulation of the torsion vibration isolation system are carried out. The results show that the proposed TQZS-VI can effectively isolate the low frequency micro-amplitude torsional vibration, reduce the natural frequency of the system, and widen the vibration isolation band. The damping characteristics of the vibration isolation system are further improved.

Moderators
EP

Elsa Piollet

Dr, Polytechnique Montréal
avatar for Mohammad Rafiee

Mohammad Rafiee

Postdoctoral Fellow, Polytechnique Montréal
Mohammad Rafiee received his Ph.D. degree in Mechanical Engineering from the University of Ottawa in 2018. Currently, he is a Postdoctoral Fellow at Polytechnique Montreal in Canada. His research interests are primarily focused on the development of advanced composite materials, smart... Read More →
AR

Annie Ross

Professor, Polytechnique Montreal

Authors

Monday July 8, 2019 17:30 - 17:50 EDT
St-Laurent 8
  T07 Struct. dyn. & nonlin. vib., RS02 Vibr & cntrl of nonlin mech syst