A new magnetorheological elastomer torsional vibration absorber: structural design and performance test

Abstract

Abstract. The semi-active torsional vibration absorber can effectively reduce the torsional vibration of the power-train system. In this paper, a new type of variable stiffness torsional vibration absorber with a magnetorheological elastomer (MRE) as an intelligent controlling element is designed, and the modal analysis, frequency-tracking scheme, and damping effects have been studied. A transient dynamic simulation is utilized to validate the rationality of the mechanical structure, the magnetic field parameters of the absorber are matched, and the magnetic circuit simulation analysis and the magnetic field supply analysis are carried out to verify the closed magnetic circuit. The principle prototype of the innovative vibration absorber is manufactured, the magnetic field strength of the absorber is tested by a Gauss meter, and the results show the efficacy of magnetizing the vibration absorber with a conductive slip ring by solving the magnetizing problem of the rotating parts of the vibration absorber. A special-purpose test rig with a torsional vibration exciter as a power source has been implemented. A comparative experiment has been carried out to test the frequency shift characteristics and authenticate the vibration-reduction effect of the new MRE torsional vibration absorber.

Optimization workflow to parameterize elastomer material models based on arbitrary time‐domain measurement data

“…The viscoelastic material behavior is reflected via a parallel connection of Maxwell elements, which are composed of a spring connected in series with a damper. 30 The strain of a Maxwell element equals the total strain ε and is formed by superposition of the elastic spring's strain ε el and the viscous damper's strain ε vis according to Equation (2).…”

“…The constitutive differential Equation ( 5) for the Maxwell element is obtained by substituting Equations ( 3) and ( 4) into (2), which can be used to calculate the element's transmitted stress via numerical integration.…”

“…Elastomer dampers are widely used to prevent damage to components or civil structures caused by vibrations 1 and to adjust the resonance behavior of mechanical systems 2 . These dampers are positioned in the main transfer path between excitation and the system to be protected, to use the damper's internal damping to dissipate a part of the vibration energy 3 and the damper's large elasticity to reduce load peaks and to shift resonance frequencies out of the excitation range 4,5 .…”

An investigation into the transferability of dynamic elastomer dampers’ properties between different damper sizes using FEM

“…Elastomer dampers are used in almost every drive system to specifically influence the dynamic behaviour of systems [1]. By making use of the dampers' high flexibility, resonances are systematically shifted out of the critical excitation range of the driving machine and damped via the internal damping of the material [2].…”

Vibration Isolation Performance of an Adaptive Magnetorheological Elastomer-Based Dynamic Vibration Absorber

“…To broaden the working frequency bandwidth, adaptive DVAs that can adjust their resonant frequency via external control inputs have been recently developed in order to cope with shifting harmonic excitation. Several studies using electromagnets [8,9], piezoelectric materials [10,11], shape memory allosy [12,13], and magnetorheological elastomer (MRE) [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] have been reported to implement adaptive DVAs.…”