Vibration analysis and optimal design of multi-layer plates partially treated with the MR fluid
作者： Mehdi Eshaghi , Ramin Sedaghati , Subhash Rakheja
DOI: 10.1016/J.YMSSP.2016.05.008
关键词: Magnetorheological fluid 、 Cantilever 、 Boundary value problem 、 Vibration 、 Structural engineering 、 Composite material 、 Shear stress 、 Finite element method 、 Plate theory 、 Materials science 、 Magnetic flux
摘要: Abstract The vibration characteristics of a sandwich plate partially treated with the Magneto-Rheological (MR) fluid are investigated numerically and experimentally considering different boundary conditions intensities magnetic flux. A cantilevered consisting an aluminum host layer nine equal cavities for MR treatments constraining was fabricated experimental characterizations validations finite-element (FE) model. dynamic responses untreated plate, where only one in core filled (MRF 132DG), were measured under harmonic excitation applied at fixed support. finite element model developed using classical theory (CPT) first-order shear deformation (FSDT) is verified data. FE considers effect slippage between top bottom layers structure. validated subsequently used to investigate effects partial treatments, flux intensity on response properties further highlighted. Finally, three optimization problems formulated identify optimal locations so as maximize variations natural frequencies damping ratios field. solution problem, attained genetic algorithm (GA) suggested that noticeable strain can stiffness structure, significantly.
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