Free vibration analysis of a laminated beam using dynamic stiffness matrix method considering delamination

Shams, Shahrokh; Torabi, A.R.; Narab, Mahdi Fatehi; Atashgah, M. A. Amiri

doi:10.1016/j.tws.2021.107952

Cited by 16 publications

(3 citation statements)

References 28 publications

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“…The analysis of the vibration characteristics of special beams focuses on the following aspects: the correction of the dynamic differential solution method, extended based on the variational principle [45,46]; sensitivity analysis under coupling constraint and time-varying geometric characteristics [47]; the beam characteristic analysis of feature abstraction [48][49][50]; and coupling analysis based on structural correlation characteristics [51][52][53].…”

Section: State Of Research On Dynamic Model-driven Rul Prediction Met...mentioning

confidence: 99%

Summarization of Remaining Life Prediction Methods for Special Power Plants

Liang,

Li,

Zhao

et al. 2023

Applied Sciences

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With continuous improvements in integration, totalization and automation, remaining useful life predictions of mechanical equipment have become a key feature of technology and core element of equipment prediction and health management. The traditional method based on degradation mechanisms is not fully capable of predicting remaining useful life, especially for special power plants that use industrial transmissions, barrel launchers, etc. The expected service requirements are higher for condition monitoring and remaining service life prediction. The effective prediction of the remaining useful life of such special power plants is a major challenge and technical bottleneck in the industrial field and national defense equipment construction. This paper analyzes and expands on the research on the remaining life prediction methods for special power plants and analyzes the remaining life prediction methods of existing dynamic models, as well as data-driven and data–model fusion drives, and specific ideas for future research and development in four aspects, including remaining useful life prediction tests supplemented with soft measurements. Additionally, future research directions for the remaining life prediction of special power plants are provided.

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Section: State Of Research On Dynamic Model-driven Rul Prediction Met...mentioning

confidence: 99%

Summarization of Remaining Life Prediction Methods for Special Power Plants

Liang,

Li,

Zhao

et al. 2023

Applied Sciences

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“…Georgantzinos et al 46 use the finite element method to evaluate the vibrational characteristics of carbon fiber-graphene-reinforced hybrid composites aiming at determining the effect of graphene inclusions in the natural frequencies. Shams et al 47 study free vibration analysis of laminated composite beam with delamination employing Euler-Bernoulli beam model and dynamic stiffness matrix method. Pradhan at al.…”

Section: Literature Reviewmentioning

confidence: 99%

Free Vibration of Laminated Composites Beams Using Strain Gradient Notation Finite Element Models

Horta

Filho

2021

Mat. Res.

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This works presents free vibration analysis of laminated composite beam problems using Timoshenko beam finite elements formulated in strain gradient notation. The formulation in physically interpretable notation identifies precisely the one parasitic shear term present in the in-plane, two-node, six-degreeof-freedom Timoshenko beam element. The spurious term can be eliminated a-priori of implementation and analysis. An assessment of the deleterious effects of parasitic shear in the computation of natural frequencies and mode shapes of laminated composite beams is performed via convergence studies. Beams with different boundary conditions and lamination schemes are analyzed. Results from models containing parasitic shear and from models corrected for it are compared. It is seen that parasitic shear affects significantly the convergence characteristics of the model as it retards convergence. It is also observed that parasitic shear affects the shapes of vibration modes. After elimination of parasitic shear, convergence of natural frequencies is attained quite rapidly. Such result is most pronounced when computing the fundamental frequency. Further, convergent results are compared to results presented in the literature for accuracy assessment, and very good agreement is found.

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“…Based on the first-order shear deformation theory, the analysis model of the vibration of the laminated composite beam with arbitrary boundary conditions considering the curing deformation is established by Peng et al (Peng, et al 2021), and the natural frequencies are obtained by Rayleigh-Ritz method. The effects of various parameters such as fiber angle and delamination length on the natural frequencies and the mode shapes are studied by Shams, et al (Shams, et al 2021). The analyse results by Minh-VanThai et al (Thai, et al 2021) show that there is a significant difference between experimental and theoretical fundamental frequencies, and modal damping is negatively correlated with the number of grooves in the beam.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation on Stiffness and Vibration Characteristics of Laminated Beams with Uniformly Vertical Displacement

Liang

Chen

2022

Lat. Am. j. solids struct.

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The laminated beam with uniformly vertical displacement can be divided into contact region and separation region when bending deformation occurs. Friction between the interfaces will cause the stiffness inconsistency between the separation region and contact region. In this paper, calculation formula of section stiffness considering interface friction effect is derived. Assuming that the beam vibrates freely in equal wavelength and equal stiffness forms respectively, the calculating formulas of natural vibration frequencies of simply supported and cantilever beams are derived. Finally, based on a steel-concrete laminated test beam with uniform vertical displacement, the natural vibration frequencies of the beam are calculated. The conclusions are as follows: The derived formulas can calculate the natural vibration frequencies of laminated beams under different interface states effectively; The influence of friction effect on the vibration frequency of laminated beams becomes more and more obvious with the increase of the order.

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Free vibration analysis of a laminated beam using dynamic stiffness matrix method considering delamination

Cited by 16 publications

References 28 publications

Summarization of Remaining Life Prediction Methods for Special Power Plants

Summarization of Remaining Life Prediction Methods for Special Power Plants

Free Vibration of Laminated Composites Beams Using Strain Gradient Notation Finite Element Models

Theoretical Investigation on Stiffness and Vibration Characteristics of Laminated Beams with Uniformly Vertical Displacement

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