Vibration analysis
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In this work, the free vibration analysis of Timoshenko microbeams made of the Functionally Graded Material (FGM) on the Winkler–Paternak elastic foundation based on the Modified Coupled Stress Theory (MCST) is investigated. Material characteristics of the beam vary throughout the thickness according to the power distribution and are estimated though Mori–Tanaka, Hashin–Shtrikman and Voigt homogenization techniques.
13p dianmotminh02 03-05-2024 8 2 Download
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This paper considers the single-degree-of-freedom (SDOF) base excited isolation with piezoelectric energy harvesting. The purpose of this paper is to find how the energy harvesting circuit affects the fixed point of the frequency response.
6p vimarillynhewson 02-01-2024 7 4 Download
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The primary objective of this work is to study the aerodynamic pressures on Mirror Surface at Various speeds to determine the effects of aerodynamics on to Mirror vibration. Additionally, the Mirror was modified by Shrouding around the external periphery to determine the possibility of minimisation of aerodynamic pressure fluctuations and thereby vibration. The Shrouding length used for the analysis was of 24mm, 34mm and 44mm length.
207p runthenight05 01-03-2023 7 3 Download
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The aim of the research was the processing of the vibration signatures from healthy and damaged composite beams acquired with the help of a Scanning Laser Vibrometer (SLV) upon excitation and analysis of the mode shapes acquired for damage detection. The displacement mode shapes acquired were then converted into curvature mode shapes with the help of a Central Difference Approximation method (CDA).
146p runthenight07 01-03-2023 6 3 Download
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In the course of current research the procedure of obtaining of the piecewise linear vibration systems time and frequency responses have been developed. The method is partly analytical and partly numerical and is based on combining of linear solutions of different sections in a cycle of motion. In a row with the method of obtaining of the exact steady state time and frequency response, also it is provided sensitivity analysis of the vibration isolator.
86p runthenight07 01-03-2023 7 3 Download
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In this paper, the author uses the forced displacement method combined with the finite element method to study the free vibration of the bar with different boundary conditions with considering the influence of the shear strain, the theory used here is the full beam theory.
10p visherylsandber 04-07-2022 19 3 Download
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This study analyses eccentrically stiffened sandwich thick plates with the core layer made of negative poisson material. The analytical method based on the first order shear deformation theory (FSDT) is applied to analyse dynamic response and vibration of the plates.
10p meyerowitz 25-12-2021 9 1 Download
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Objectives of the thesis: The literature review on the behaviours of composite beams shows that Ritz method is efficient to analyse the behaviours of composite beams with various boundary conditions, however, the number of researches used this method is still limited.
203p monsterhunterer 20-06-2021 7 2 Download
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The objectives of the thesis: The thesis has developed a technique by combining the equivalent linearization method and the weighted averaging value to analyze the responses of some undamped free nonlinear vibrations.
31p extraenglish 24-05-2021 13 3 Download
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The thesis has developeda technique by combining the equivalent linearization method and the weighted averagingvalueto analyze the responses of some undamped free nonlinear vibrations.
31p capheviahe29 17-03-2021 27 3 Download
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The object of this thesis is to propose some beam models for static, buckling and vibration analysis of functionally graded isotropic and sandwich beams embedded in hygro-thermo-mechanical environments.
216p capheviahe28 01-03-2021 23 3 Download
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This paper studies the effect of the change in air-fuel ratio on the engine and automobiles vibrations. Principle of vibration analysis is used to determine the system behavior. Air-fuel ratio is studied, as an input parameter, for stoichiometric, rich and lean fuels.
9p lucastanguyen 01-06-2020 26 2 Download
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In the current context of eco-pollution, the substitute of conventional plastics with bioplastics is a big confront. On account of that, a non-growth associated PHB production study was conducted using Zobellella species under submerged fermentation process. As a result, Zobellella species showed the ability to accumulate 2.2g/L of PHB at pH 8. 0, temperature 37oC, salt concentration 2% in modified growth medium containing vitamins. Then, primary structural characterization of extracted polymer was conducted by FTIR analysis. The high intense peak was obtained at 1720.
7p nguaconbaynhay6 24-06-2020 37 2 Download
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A molecular mechanism of the [3+2] cycloaddition has been explored using various DFT theoretical levels.
8p tocectocec 25-05-2020 5 1 Download
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This paper is concerned with the vibration and stability analysis of thick rectangular plates resting on elastic foundation, which is distributed over the particular area of the plate. A two-parameter (Pasternak) model is considered to describe the elastic foundation.
18p tohitohi 19-05-2020 8 0 Download
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This paper presents a numerical solution for vibration analysis of cantilevered non-uniform trapezoidal thick plates. Based on the first shear deformation theory, kinetic and strain energies of the plate are derived and using Hamilton's principle, governing equations and boundary conditions are derived.
22p tohitohi 19-05-2020 16 0 Download
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The present problem deals with the thermo-elastic interaction of a gold nano-beam resonator induced by ramp-type heating under the two temperature theory of generalized thermoelasticity. The governing equations are constructed in the context of two-temperature three-phase-lag model (2T3P) and two-temperature Lord-Shulman (2TLS) model of generalized thermoelasticity.
16p tohitohi 19-05-2020 13 0 Download
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An Eddy current damper uses magnets to suppress vibrations due to external excitations. These dampers also called electromagnetic dampers, have advantages of no mechanical contact, high reliability and stability, but require a relatively large volume and mass to attain a given amount of damping.
8p tohitohi 19-05-2020 23 2 Download
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This paper presents a numerical analysis of free vibration of thin circular and annular plate using finite element method. The first five natural frequencies are presented for uniform annular plates of various inner-to-outer radius ratios, with nine possible combinations of free, clamped and simply supported boundary conditions at the inner and outer edges of plates.
8p tohitohi 19-05-2020 28 1 Download
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In this paper free vibration analysis of eccentric and concentric stiffened isotropic plate with central stiffener and double stiffener has been studied and effect of various parameters such as boundary conditions, aspect ratio on non-dimensional frequency parameter of plate are investigated.
12p tohitohi 19-05-2020 14 0 Download