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State of the Art of Vibration Analysis of Nonlinear Mechanical...
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State of the Art of Vibration Analysis of Nonlinear Mechanical Systems

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

Deadline for manuscript submissions: closed (20 July 2024) | Viewed by 3217

Special Issue Editor

Dr. Yong Wang

E-Mail Website
Guest Editor
1. Automotive Engineering Research Institute, Jiangsu University, Zhenjiang 212013, China
2. School of Aeronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: nonlinear dynamics; nonlinear vibration; vibration control; structural stability
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nonlinearity exists widely in mechanical systems due to material and geometric nonlinearities. Vibration analysis plays an important role in the structural design and operating maintenance of nonlinear mechanical systems, which provides a deep insight into underlying dynamic characteristics, nonlinear behaviors, the and general relationship between structural parameters. Thus, more efficient and effective vibration analysis methods, such as theoretical, numerical and experimental methods, should be developed to reveal the inherent dynamic mechanisms and characteristics of nonlinear mechanical systems. In addition, active, semi-active, and passive vibration control techniques are expected to be used to control unwanted vibrations in nonlinear mechanical systems.

This Special Issue aims to showcase the ongoing developments, new projects, current achievements, and future perspectives of vibration analysis for nonlinear mechanical systems, from theoretical or experimental perspectives. Researchers are welcome to contribute original research or review papers. The major topics of this Special Issue include, but are not limited to:

  • Dynamic modeling of nonlinear mechanical systems.
  • Vibration analysis of nonlinear mechanical systems.
  • Analytical and numerical methods of nonlinear mechanical systems.
  • Bifurcation and chaos in nonlinear mechanical systems.
  • Vibration and stability control of nonlinear mechanical systems.
  • Active, semi-active, and passive vibration control of nonlinear mechanical systems.

Dr. Yong Wang
Guest Editor

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

  • vibration analysis
  • nonlinear mechanical system
  • nonlinear dynamics
  • nonlinear vibration
  • vibration control
  • stability control
  • analytical method

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Published Papers (2 papers)

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Research

23 pages, 19966 KiB  
Article
Amplitude-Sensitive Single-Pumper Hydraulic Engine Mount Design without a Decoupler
by Nader Vahdati, Aamna Alteneiji, Fook Fah Yap and Oleg Shiryayev
Appl. Sci. 2024, 14(6), 2568; https://doi.org/10.3390/app14062568 - 19 Mar 2024
Cited by 1 | Viewed by 1411
Abstract
Engine mounts serve three primary purposes: (1) to support the weight of the engine, (2) to lessen the transmitted engine disturbance forces to the vehicle structure/chassis or airplane fuselage, and (3) to limit the engine motion brought on by shock excitations. The engine [...] Read more.
Engine mounts serve three primary purposes: (1) to support the weight of the engine, (2) to lessen the transmitted engine disturbance forces to the vehicle structure/chassis or airplane fuselage, and (3) to limit the engine motion brought on by shock excitations. The engine mount’s stiffness must be high to control large engine motions and low to control chassis or vehicle body vibration. When hydraulic engine mounts are used, a device called a decoupler creates the dual stiffness requirement. However, numerous investigations have shown that the decoupler has the potential to rotate within its cage bound and become stuck or sink and obstruct fluid flow between the fluid chambers due to a density mismatch between the decoupler and the working fluid. In addition, most hydraulic engine mounts with a decoupler no longer act as vibration isolators but as hydraulic dampers. This study suggests a new amplitude-sensitive hydraulic engine mount design without a decoupler, where the vibration isolation of the engine mount is retained and there is a 75% reduction in the peak frequency, which further enhances the engine mount’s capabilities in comparison to the current hydraulic engine mounts with a decoupler. The new design concept and its mathematical model and simulation results will be presented. Full article
(This article belongs to the Special Issue State of the Art of Vibration Analysis of Nonlinear Mechanical Systems)
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32 pages, 16866 KiB  
Article
Dynamic Characteristic Analysis of a Half-Vehicle Seat System Integrated with Nonlinear Energy Sink Inerters (NESIs)
by Yuanyuan Zhang, Chunling Ren, Haodong Meng and Yong Wang
Appl. Sci. 2023, 13(22), 12468; https://doi.org/10.3390/app132212468 - 18 Nov 2023
Cited by 5 | Viewed by 1287
Abstract
To enhance the dynamic performance of half-vehicle seat systems and reduce vibrations in both the vertical and pitching directions, a nonlinear energy sink inerter (NESI) can be introduced and aligned with lightweight design principles. A dynamic model of a half-vehicle seat system integrated [...] Read more.
To enhance the dynamic performance of half-vehicle seat systems and reduce vibrations in both the vertical and pitching directions, a nonlinear energy sink inerter (NESI) can be introduced and aligned with lightweight design principles. A dynamic model of a half-vehicle seat system integrated with NESIs is constructed using Newton’s second law. The dynamic response of the system under pavement harmonic and random excitations is obtained using the pseudo-arc-length and harmonic balance methods and the numerical method, respectively. The dynamic behavior of the system is assessed using eight evaluation indexes. The optimal structural parameters of the NESIs are determined through the genetic algorithm. The results indicate that using NESIs attenuates resonance peaks and reduces root mean square (RMS) values for vehicle seat suspension strokes, front and rear suspension system strokes, and front and rear dynamic tire loads. However, the resonance peaks and RMS values for other performance indexes, which are vehicle seat vertical acceleration, the bodywork vertical, and pitching accelerations, exhibit an increase. When the structural parameters of the NESIs are optimized and contrasted with the original NESIs, the RMS values of the bodywork’s vertical and pitching acceleration, seat vertical acceleration, and seat suspension stroke will decrease by 23.97%, 27.48%, 23.59%, and 14.29%, respectively, and the other evaluation indexes will satisfy the limit conditions. Full article
(This article belongs to the Special Issue State of the Art of Vibration Analysis of Nonlinear Mechanical Systems)
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