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Vibration
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Structural Dynamics and Vibration Control
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Structural Dynamics and Vibration Control

A special issue of Vibration (ISSN 2571-631X).

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 12588

Special Issue Editors

Dr. Fiorenzo A. Fazzolari

E-Mail Website
Guest Editor
School of Engineering Brodie Tower, University of Liverpool, 5th Floor, Room 512 Brownlow Hill, Liverpool L69 3GH, UK
Interests: computational methods; dynamics and vibrations; thermoelasticity; CNT- and GPL-reinforced composite structures; fibre-reinforced composite structures; functionally-graded materials; smart materials; statistical energy analysis
Dr. Francesco Tornabene

grade E-Mail Website
Guest Editor
Department of Innovation Engineering, University of Salento, 73100 Lecce, Italy
Interests: theory of shells, plates, arches, and beams; generalized differential quadrature; FEM; SFEM; WFEM; IGA; SFIGA; WFIGA; advanced composite materials; functionally graded materials; nanomaterials and nanotechnology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Structural dynamics and related vibration control problems are amongst the most researched topics in aerospace, marine, civil, as well as mechanical engineering applications today. In this respect, the aim of this Special Issue is to share knowledge and to foster and boost discussions on the latest computational methods and experimental techniques employed to analyse and investigate complex dynamics systems and structures, including low-, medium- and high-frequency range problems in the former, and the latest and most advanced composite materials in the latter.

Stability analysis of both determinist and stochastic dynamics systems and related control techniques is suitable for this Special Issue. In addition, investigations of nonlinear systems or linear systems with localised nonlinearities are also invited.

Moreover, along with classical metallic alloys, analyses of fibre-reinforced composites and laminates, functionally-graded materials (FGMs), carbon nanotubes (CNTs), graphene nanoplatelets (GPLs), as well as innovative and advanced classes of composites are welcome. In addition, the submission of articles focused on smart materials such as piezoelectric sensors and actuators, shape memory alloys, magnetorheological materials, and magnetostrictive and electrostrictive materials, among others—employed for vibration control issues—is highly encouraged.

Dr. Fiorenzo A. Fazzolari
Dr. Francesco Tornabene
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Vibration is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Smart materials
  • active and passive vibration control
  • fibre-reinforced laminated composite structures
  • graphene-based reinforcements for polymer composites
  • statistical energy analysis
  • hybrid computational techniques
  • multiphysics problems
  • discrete systems
  • complex dynamics systems
  • nonlinear systems
  • stochastic systems
  • experimental modal analysis
  • nanocomposites
  • functionally-graded materials
  • meshless methods
  • finite element method
  • metamaterials
  • piezoelectric materials
  • shape memory alloys
  • magnetorheological materials

Published Papers (4 papers)

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Research

21 pages, 2170 KiB  
Article
Linear Control of a Nonlinear Equipment Mounting Link
by Darren Williams, Javad Tagihpour, Hamed Haddad Khodaparast and Shakir Jiffri
Vibration 2021, 4(3), 679-699; https://doi.org/10.3390/vibration4030038 - 31 Aug 2021
Cited by 1 | Viewed by 2479
Abstract
The linear control of a nonlinear response is investigated in this paper, and a nonlinear model of the system is developed and validated. The design of the control system has been constrained based on a suggested application, wherein mass and expense are parameters [...] Read more.
The linear control of a nonlinear response is investigated in this paper, and a nonlinear model of the system is developed and validated. The design of the control system has been constrained based on a suggested application, wherein mass and expense are parameters to be kept to a minimum. Through these restrictions, the array of potential applications for the control system is widened. The structure is envisioned as a robot manipulator link, and the control system utilises piezoelectric elements as both sensors and actuators. A nonlinear response is induced in the structure, and the control system is employed to attenuate these vibrations which would be considered a nuisance in practical applications. The nonlinear model is developed based on Euler–Bernoulli beam theory, where unknown parameters are obtained through optimisation based on a comparison with experimentally obtained data. This updated nonlinear model is then compared with the experimental results as a method of empirical validation. This research offers both a solution to unwanted nonlinear vibrations in a system, where weight and cost are driving design factors, and a method to model the response of a flexible link under conditions which yield a nonlinear response. Full article
(This article belongs to the Special Issue Structural Dynamics and Vibration Control)
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18 pages, 2411 KiB  
Article
Evaluation of TMD Performance in Footbridges Using Human Walking Probabilistic Models
by Filipe Rezende, Otávio Brunet, Jr., Wendell Diniz Varela, André Pereira and Eliane Carvalho
Vibration 2021, 4(2), 323-340; https://doi.org/10.3390/vibration4020021 - 06 Apr 2021
Cited by 5 | Viewed by 2711
Abstract
Footbridges are generally slender and lightweight structures with low stiffness, designed to support dynamic loads generated by crowds. Therefore, these structures are exposed to vibration problems related to the resonance of human walking step frequencies and the lower vibration modes. To mitigate these [...] Read more.
Footbridges are generally slender and lightweight structures with low stiffness, designed to support dynamic loads generated by crowds. Therefore, these structures are exposed to vibration problems related to the resonance of human walking step frequencies and the lower vibration modes. To mitigate these problems, one of the most applied corrective strategies is the installation of tuned mass damper (TMD) systems that aim at the vibration reduction of the footbridge’s dominant mode. A fundamental matter in both the footbridge and the TMD design is the pedestrian load modelling, generally considered as a deterministically moving force or a biodynamic model. However, as human gait is a random process, the deterministic models can lead to non-realistic results, directly affecting the TMD system efficiency. In contrast, the use of probabilistic distributions to simulate the human walk randomness can lead to more reliable time series predictions. In this paper, a random walk (RW) algorithm is developed and applied to simulate different crowd scenarios using a simplified plane model of a coupled human-structure-TMD system. In each scenario, the TMD efficiency in reducing the vibration amplitudes is assessed. Results highlight the importance of considering the walking randomness and pedestrians’ dynamic properties in the TMD design. Full article
(This article belongs to the Special Issue Structural Dynamics and Vibration Control)
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16 pages, 2277 KiB  
Article
A Linearised Hybrid FE-SEA Method for Nonlinear Dynamic Systems Excited by Random and Harmonic Loadings
by Fiorenzo A. Fazzolari and Puxue Tan
Vibration 2020, 3(3), 304-319; https://doi.org/10.3390/vibration3030021 - 17 Sep 2020
Cited by 3 | Viewed by 2526
Abstract
The present paper proposes a linearised hybrid finite element-statistical energy analysis (FE-SEA) formulation for built-up systems with nonlinear joints and excited by random, as well as harmonic, loadings. The new formulation was validated via an ad-hoc developed stochastic benchmark model. The latter was [...] Read more.
The present paper proposes a linearised hybrid finite element-statistical energy analysis (FE-SEA) formulation for built-up systems with nonlinear joints and excited by random, as well as harmonic, loadings. The new formulation was validated via an ad-hoc developed stochastic benchmark model. The latter was derived through the combination of the Lagrange-Rayleigh-Ritz method (LRRM) and the Monte Carlo simulation (MCS). Within the build-up plate systems, each plate component was modelled by using the classical Kirchhoff’s thin-plate theory. The linearisation processes were carried out according to the loading-type. In the case of random loading, the statistical linearisation (SL) was employed, while, in the case of harmonic loading, the method of harmonic balance (MHB) was used. To demonstrate the effectiveness of the proposed hybrid FE-SEA formulation, three different case studies, made-up of built-up systems with localized cubic nonlinearities, were considered. Both translational and torsional springs, as joint components, were employed. Four different types of loadings were taken into account: harmonic/random point and distributed loadings. The response of the dynamic systems was investigated in terms of ensemble average of the time-averaged energy. Full article
(This article belongs to the Special Issue Structural Dynamics and Vibration Control)
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15 pages, 2239 KiB  
Article
Nonlocal Torsional Vibration of Elliptical Nanorods with Different Boundary Conditions
by Farshad Khosravi, Seyyed Amirhosein Hosseini, Babak Alizadeh Hamidi, Rossana Dimitri and Francesco Tornabene
Vibration 2020, 3(3), 189-203; https://doi.org/10.3390/vibration3030015 - 07 Aug 2020
Cited by 20 | Viewed by 3265
Abstract
This work aims at investigating the free torsional vibration of one-directional nanostructures with an elliptical shape, under different boundary conditions. The equation of motion is derived from Hamilton’s principle, where Eringen’s nonlocal theory is applied to analyze the small-scale effects. The analytical Galerkin [...] Read more.
This work aims at investigating the free torsional vibration of one-directional nanostructures with an elliptical shape, under different boundary conditions. The equation of motion is derived from Hamilton’s principle, where Eringen’s nonlocal theory is applied to analyze the small-scale effects. The analytical Galerkin method is employed to rewrite the equation of motion as an ordinary differential equation (ODE). After a preliminary validation check of the proposed formulation, a systematic study investigates the influence of the nonlocal parameters, boundary conditions, geometrical and mechanical parameters on the natural frequency of nanorods; the objective is to provide useful findings for design and optimization purposes of many nanotechnology applications, such as, nanodevices, actuators, sensors, rods, nanocables, and nanostructured aerospace systems. Full article
(This article belongs to the Special Issue Structural Dynamics and Vibration Control)
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