Estimation of measurement errors in orthotropic elastic moduli determined from natural frequencies
Sign Up to like & getrecommendations! Published in 2017 at "Structural and Multidisciplinary Optimization"
DOI: 10.1007/s00158-016-1552-9
Abstract: Orthotropic elastic moduli of composite structures can be identified by nonlinear least squares fit between measured and computed natural frequencies. However, due to measurement errors contained in the measured natural frequencies and mode shapes, the… read more here.
Keywords: test specimen; measurement errors; orthotropic elastic; elastic moduli ... See more keywords
Identifying the temperature effect on the vibrations of functionally graded cylindrical shells with porosities
Sign Up to like & getrecommendations! Published in 2018 at "Applied Mathematics and Mechanics"
DOI: 10.1007/s10483-018-2388-6
Abstract: The free thermal vibration of functionally graded material (FGM) cylindrical shells containing porosities is investigated. Both even distribution and uneven distribution are taken into account. In addition, three thermal load types, i.e., uniform temperature rise… read more here.
Keywords: temperature; temperature rise; functionally graded; fgm cylindrical ... See more keywords
Comparison of Natural Frequencies of Fluid-Conveying Functionally Graded Thin-Walled Pipes in Two Cases of Temperature Distributions
Sign Up to like & getrecommendations! Published in 2018 at "Mechanics of Composite Materials"
DOI: 10.1007/s11029-018-9771-3
Abstract: The dynamic response of shear deformable functionally graded (FG) pipes conveying nd internal fluid is studied to determine the effects of temperature gradient, and to determine the effect of two cases of temperature distributions on… read more here.
Keywords: cases temperature; functionally graded; temperature distributions; two cases ... See more keywords
Galerkin Analysis of Effect of Dead Load on Natural Frequencies of Box Beam
Sign Up to like & getrecommendations! Published in 2018 at "Journal of The Institution of Engineers (India): Series C"
DOI: 10.1007/s40032-018-0494-y
Abstract: Based on Hamilton’s principle, a nonlinear differential equation considering the effect of dead loads is formulated for box beams. By using Galerkin method, the effect of dead load on the natural frequencies of box beams… read more here.
Keywords: effect dead; effect; dead load; frequencies box ... See more keywords
Investigation on large turbo-generator stator end winding dynamic characteristics based on response surface method
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Power Electronics"
DOI: 10.1007/s43236-021-00296-8
Abstract: The natural frequencies corresponding to the particular mode shapes of a large turbo-generator must not be in the resonance region before delivery. Different parameters may clearly affect these dynamic characteristics. Different from other studies, this… read more here.
Keywords: response; end winding; response surface; method ... See more keywords
Precise integration method for natural frequencies and mode shapes of ocean risers with elastic boundary conditions
Sign Up to like & getrecommendations! Published in 2018 at "Applied Mathematical Modelling"
DOI: 10.1016/j.apm.2018.05.017
Abstract: Abstract The effects of the elastic constraints simulating damaged and undamaged boundaries on the natural frequencies and mode shapes of ocean risers with a variable axial tension are investigated using the precise integration method (PIM).… read more here.
Keywords: ocean risers; frequencies mode; boundary conditions; mode shapes ... See more keywords
Superconvergent isogeometric analysis of natural frequencies for elastic continua with quadratic splines
Sign Up to like & getrecommendations! Published in 2019 at "Computer Methods in Applied Mechanics and Engineering"
DOI: 10.1016/j.cma.2019.01.010
Abstract: Abstract A superconvergent isogeometric formulation is presented to accurately analyze the natural frequencies for elastic continua. This formulation is realized by a set of superconvergent quadrature rules which are designed for the numerical integration of… read more here.
Keywords: frequencies elastic; quadrature; natural frequencies; elastic continua ... See more keywords
An upper bound theory to approximate the natural frequencies and parameters identification of composite beams
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DOI: 10.1016/j.compstruct.2017.03.014
Abstract: For the free vibration of composite beams and non-uniform beams we propose a new upper bound theory to approximate the first few natural frequencies. The Rayleigh quotient is expressed in terms of boundary functions, instead… read more here.
Keywords: order; bound theory; upper bound; function ... See more keywords
The effect of foam properties on vibration response of curved sandwich composite panels
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DOI: 10.1016/j.compstruct.2017.03.059
Abstract: Abstract In this study, a numerical and experimental study was carried out to determine the effects of variables such as curvature and foam properties on the natural frequencies of the sandwich panels. Sandwich panels consist… read more here.
Keywords: increasing foam; foam; curvature; foam properties ... See more keywords
Natural frequencies and dynamic responses of rotating composite non-uniform beams with an elastically root in hygrothermal environment
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DOI: 10.1016/j.compstruct.2018.11.029
Abstract: Abstract The vibration characteristics and dynamic responses of a rotating composite non-uniform beam based on Rayleigh beam theory considering the combined influence of hygrothermal environment and elastically restrained root are investigated in this paper. The… read more here.
Keywords: composite non; rotating composite; dynamic responses; responses rotating ... See more keywords
Vibration behaviours of single/multi-debonded composite sandwich structures with nanoparticle-modified matrices
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DOI: 10.1016/j.compstruct.2018.11.071
Abstract: Abstract Sandwich structures with carbon fibre reinforced plastic (CFRP) facesheets are widely used in aerospace and marine structures because they have high strength, stiffness and light weight. However, debonds between the facesheets and the core… read more here.
Keywords: behaviours single; debonded regions; sandwich structures; vibration behaviours ... See more keywords