The main objective of this study is to reduce optimal vibration suppression of Timoshenko beam under non-periodic step and impulse inputs. Cantilever beam was modeled by Timoshenko theory and finite element numerical method. Stiffness (K), mass (M), and damping (C) matrices are extracted. Then, in order to control structure vibration, piezoelectric patches were used due to simultaneous dual beh...

This article describes semi-active modern control schemes for a quarter-vehicle suspension with magnetorheological damper (MRD) to attenuate vibrations and simultaneously improve the passenger comfort vehicle road-holding. The first solution is multiple positive position feedback (MPPF) scheme vibration amplitude at two modal frequencies. second based on elementary passivity considerations exac...

Helicopter gearbox support strut is one of the main research objects in field vibration and noise control helicopter cabins. Aiming to further widen attenuation range traditional Bragg periodic struts, a novel type Local resonance (LR)/Bragg coupling with graded parameters as well reverse design method proposed. Combined spectral element (SEM) transfer matrix (TMM), analytical expression transf...

This paper investigates the influences of nonperiodic rainbow resonators on vibration attenuation two-dimensional metamaterial plates. Rainbow plates composed thin host and stepped are considered compared with periodic The modelled finite element modelling method verified by plane wave expansion method. It was found that spatially varying possess broader bands than plate same total mass. extens...