Abstract. The semi-active torsional vibration absorber can effectively reduce the of power-train system. In this paper, a new type variable stiffness with magnetorheological elastomer (MRE) as an intelligent controlling element is designed, and modal analysis, frequency-tracking scheme, damping effects have been studied. A transient dynamic simulation utilized to validate rationality mechanical...

Purpose The existing Nonlinear Dynamic Vibration Absorbers (NLDVAs) have the disadvantages of complex structure, high cost, installation space requirements and difficulty in miniaturization. And most NLDVAs not been applied to reality. To address above issues, a novel Triple-magnet Magnetic Absorber (TMDVA) with tunable stiffness, only composed triple cylindrical permanent magnets an acrylic tu...

The purpose of this paper is control of simply supported flexible core sandwich beam's linear vibration equipped with piezoelectric patches under different loads. The effects of external forces imposed on sandwich beam can be reached to a minimum value by designing an appropriate controller and control the beam's vibration. Three-layer sandwich beam theory is used for analytical modeling of san...

The strong and complex vibration from a manipulator for anchor drilling will damage the key components of produce noise at same time. According to its characteristics, fluid–spring absorption approach with five degrees freedom (DOFs) is proposed, which has perfect symmetry, absorber was designed symmetrical structure. Employing generalization formula Bernoulli equation dynamic equation, couplin...

For investigating the detail effects of the vibration absorbers in the cavity of the double-layer wall (DLW), a vibro-acoustic numerical model was developed and the behavior of the system was simulated by the finite-difference time-domain method (FDTD method). By comparing the results for various cases, the mechanism of the vibration absorber in the DLW and the effects of the location side and ...

The dynamic viscoelasticity of full-size wood composite panels (WCPs) under the free-free vibrational state were determined by a vibration testing method. Vibration detection tests were performed on 194 pieces of three types of full-size WCPs (particleboard, medium density fiberboard, and plywood (PW)). The dynamic viscoelasticity from smaller specimens cut from the panels was measured using a ...