Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.5
2.7
Journals
Applied Sciences
Special Issues
Technical Advances in Vibration Analysis: Modeling, Simulation and Applications
share announcement

Technical Advances in Vibration Analysis: Modeling, Simulation and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: 30 May 2024 | Viewed by 3013

Special Issue Editors

Prof. Dr. Mihai Bugaru

E-Mail Website
Guest Editor
Department of Mechanics, National University of Science & Technology Politehnica of Bucharest, 060042 Bucharest, Romania
Interests: nonlinear vibrations; stability analysis; vibrations of continuum media; chaotic manifestation of vibrating systems
Dr. Ovidiu Vasile

E-Mail Website
Guest Editor
Department of Mechanics, National University of Science & Technology Politehnica of Bucharest, 060042 Bucharest, Romania
Interests: vibration control; seismic isolation; dynamic and nonlinear systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue covers a broad range of topics, such as vibration control, vibration generation and propagation, the effects of vibration, condition monitoring and vibration testing, modeling, prediction and simulation of vibration, environmental and occupational vibration, and vibration attenuators, as well as biomechanics. The Special Issue also addresses analytical, numerical, and experimental techniques for evaluating linear and non-linear vibration problems (including strong nonlinearity). It is primarily intended for academics, researchers, and professionals, as well as Ph.D. students, in various fields of the vibration of mechanical structures such as investigations on stability analysis, chaotic manifestations of vibrating systems, and computations of nonlinear amplitude and phase angle.

Prof. Dr. Mihai Bugaru
Dr. Ovidiu Vasile
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. Applied Sciences is an international peer-reviewed open access semimonthly 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 2400 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

  • linear vibrations
  • nonlinear vibrations
  • vibrations of continuum media
  • multi-body systems vibration
  • methods for computing the amplitude and phase angle of stationary and nonstationary vibrations
  • stability analysis
  • monitoring and vibrations testing
  • vibration insulators
  • mechanical and biomechanical vibration systems analysis
  • chaotic manifestations of vibrating systems

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

17 pages, 9032 KiB  
Article
Design and Experiment of a Passive Vibration Isolator for Small Unmanned Aerial Vehicles
by Chan-Hwi Kang, Hun-Suh Park, Seong-Weon Seo and Dong-Gi Kwag
Appl. Sci. 2024, 14(10), 4113; https://doi.org/10.3390/app14104113 - 12 May 2024
Viewed by 574
Abstract
The advancement of sensor, actuator, and flight control technologies has increasingly expanded the possibilities for drone utilization. Among the technologies related to drone applications, the vibration isolator technology for payload has a significant impact on the precision of optical equipment in missions such [...] Read more.
The advancement of sensor, actuator, and flight control technologies has increasingly expanded the possibilities for drone utilization. Among the technologies related to drone applications, the vibration isolator technology for payload has a significant impact on the precision of optical equipment in missions such as detection, reconnaissance, and tracking. However, despite ongoing efforts to develop vibration isolators to mitigate the impact of vibrations transmitted to optical equipment, research on drone-specific natural frequencies and payloads has been lacking. Consequently, there is a need for research on vibration isolators tailored to specific drone types and optical equipment payloads. This study focuses on exploring the correlation between the natural frequencies of drones and the weight of the payload, and proposes methods for developing and testing vibration isolators that consider both factors. To achieve this, the study measured the stiffness of vibration isolator rubbers and conducted cross-validation between random vibration tests and finite element method (FEM) analyses to verify the vibration reduction effects resulting from changes in the dynamic characteristics of vibration isolator rubbers. The rubber with a shore hardness of 70 exhibited relatively high damping and damping performance during random vibration tests. Additionally, it showed relatively high stability with only one resonance point measured within the operational frequency band. Through the findings of this study, a methodology for selecting vibration isolators for drones is proposed, aiming to enhance the stability of optical equipment. Full article
(This article belongs to the Special Issue Technical Advances in Vibration Analysis: Modeling, Simulation and Applications)
►▼ Show Figures

Figure 1

20 pages, 1013 KiB  
Article
Bandgap Dynamics in Locally Resonant Metastructures: A General Theory of Internal Resonator Coupling
by Hossein Alimohammadi, Kristina Vassiljeva, S. Hassan HosseinNia and Eduard Petlenkov
Appl. Sci. 2024, 14(6), 2447; https://doi.org/10.3390/app14062447 - 14 Mar 2024
Viewed by 472
Abstract
The dynamics of metastructures, incorporating both conventional and internally coupled resonators, are investigated to enhance vibration suppression capabilities through a novel mathematical framework. A close-form formulation and a transfer function methodology are introduced, integrating control system theory with metastructure analysis, offering new insights [...] Read more.
The dynamics of metastructures, incorporating both conventional and internally coupled resonators, are investigated to enhance vibration suppression capabilities through a novel mathematical framework. A close-form formulation and a transfer function methodology are introduced, integrating control system theory with metastructure analysis, offering new insights into the role of internal coupling. The findings reveal that precise internal coupling, when matched exactly to the stiffness of the resonator, enables the clear formation of secondary bandgaps, significantly influencing the vibration isolation efficacy of the metastructure. Although the study primarily focuses on theoretical and numerical analyses, the implications of adjusting mass distribution on resonators are also explored. This formulation methodology enables the adjustment of bandgap characteristics, underscoring the potential for adaptive control over bandgaps in metastructures. Such capabilities are crucial for tailoring the vibration isolation and energy harvesting functionalities in mechanically resonant systems, especially when applied to demanding heavy-duty applications. Full article
(This article belongs to the Special Issue Technical Advances in Vibration Analysis: Modeling, Simulation and Applications)
►▼ Show Figures

Figure 1

17 pages, 5208 KiB  
Article
Optimization Design of Double Wishbone Front Suspension Parameters for Large Mining Dump Truck and Analysis of Ride Comfort
by Jianqiao Zhao, Xueping Ren, Zhiming Dong and Tongtong Liu
Appl. Sci. 2024, 14(5), 1812; https://doi.org/10.3390/app14051812 - 22 Feb 2024
Viewed by 735
Abstract
With the advancement of technology, mining trucks are gradually becoming larger, imposing higher performance requirements on the front suspension. There is a need to transform the original integral non-independent front axle of mining dump trucks with a payload exceeding 300 tons into an [...] Read more.
With the advancement of technology, mining trucks are gradually becoming larger, imposing higher performance requirements on the front suspension. There is a need to transform the original integral non-independent front axle of mining dump trucks with a payload exceeding 300 tons into an independent front suspension with a double-wishbone suspension. The changing of the front suspension is bound to have an impact on the overall vehicle’s handling stability and ride comfort. Therefore, the following research is conducted to investigate and analyze these effects. Firstly, the paper proposes a method for optimizing the parameters of the double-wishbone front suspension. The double-wishbone front suspension is modeled, and a comparison with a kinematic model is conducted to validate the accuracy of the model. Secondly, unreasonable hardpoint parameters are optimized. Thirdly, a dynamic model of the entire vehicle is established based on the optimized parameters, and an analysis of handling stability and ride comfort for the entire vehicle is performed. Finally, simulation results are compared and analyzed against experimental data. The results indicate that the optimized positioning parameters not only effectively enhance the suspension performance of the mining dump truck but also meet the requirements for handling stability and smoothness. The overall smoothness of the vehicle is significantly improved after the modification. This study not only holds significant engineering value in reducing vibrations in dump trucks and enhancing driver comfort, but also provides theoretical support for subsequent research and development in the industry. Full article
(This article belongs to the Special Issue Technical Advances in Vibration Analysis: Modeling, Simulation and Applications)
►▼ Show Figures

Figure 1

19 pages, 6535 KiB  
Article
Microgravity Decoupling in Torsion Pendulum for Enhanced Micro-Newton Thrust Measurement
by Linxiao Cong, Jiabin Wang, Jianfei Long, Jianchao Mu, Haoye Deng and Congfeng Qiao
Appl. Sci. 2024, 14(1), 91; https://doi.org/10.3390/app14010091 - 21 Dec 2023
Viewed by 783
Abstract
To enhance the accuracy of micro-Newton thrust measurements via a torsion pendulum, addressing microgravity coupling effects caused by platform tilt and pendulum mass eccentricity is crucial. This study focuses on analyzing and minimizing these effects by alleviating reference surface tilt and calibrating the [...] Read more.
To enhance the accuracy of micro-Newton thrust measurements via a torsion pendulum, addressing microgravity coupling effects caused by platform tilt and pendulum mass eccentricity is crucial. This study focuses on analyzing and minimizing these effects by alleviating reference surface tilt and calibrating the center of mass during thrust measurements. The study introduced analysis techniques and compensation measures. It first examined the impact of reference tilt and center of mass eccentricity on the stiffness and compliance of the torsion pendulum by reconstructing its dynamic model. Simscape Multibody was initially employed for numerical analysis to assess the dynamic coupling effects of the tilted pendulum. The results showed the influence of reference tilt on the stiffness and compliance of the torsion pendulum through simulation. An inverted pendulum was developed to amplify the platform’s tilt angle for microgravity drag-free control. Center of mass calibration can identify the gravity coupling caused by the center of mass position. Based on the displacement signal from the capacitive sensor located at the end of the inverted pendulum, which represents the platform’s tilt angle, the pendulum’s vibration at 0.1 mHz was reduced from 5.7 μm/Hz1/2 to 0.28 μm/Hz1/2 by adjusting the voltage of piezoelectric actuator. Finally, a new two-stage torsion pendulum structure was proposed to decouple the tilt coupling buried in both pitch and roll angle. The study utilized theoretical models, numerical analysis, and experimental testing to validate the analysis methods and compensation measures for microgravity coupling effects in torsion pendulums. This led to a reduction in low-frequency noise caused by ground vibrations and thermal strains, ultimately improving the micro-Newton thrust measurement accuracy of the torsion pendulum through the platform’s drag-free control. Full article
(This article belongs to the Special Issue Technical Advances in Vibration Analysis: Modeling, Simulation and Applications)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop