Vibration Isolating and Impact Protecting Systems with Quasi-Zero Stiffness Providing Wide Operating Area

Зотов, А. Н.; Valeev, Anvar

doi:10.1007/978-3-030-22041-9_34

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…Five vibration frequency ranges are usually distinguished: infra-low (up to 2 Hz), low (up to 200 Hz), medium (200-2000 Hz), high (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), ultra-high (20-500 kHz and above) [17]. For building structures, the main vibration energy is concentrated in the range below 100 Hz, for machine tools -up to 500 Hz, and for high-speed machines, the upper limit of the range can reach 2000 Hz.…”

Section: Vibration Isolation Materialsmentioning

confidence: 99%

“…The term "vibration protection" means carrying out a whole range of measures aimed at reducing the impact of vibrations of buildings, structures, equipment, appliances, devices, vehicles to acceptable levels, as well as protecting people from its harmful effects [1,2]. In practice, the following methods of vibration protection are used [3]: vibration isolation, i.e.…”

Section: Introductionmentioning

confidence: 99%

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The Concept of Vibration Protection and an Overview of the Global Market of Vibration Protection Materials

Domnina,

Nikitin,

Repko

et al. 2022

Intellekt. Sist. Proizv.

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Due to the development of modern technologies, the number of sources initiating vibrations and noises has significantly increased. A variety of techniques are used to eliminate the negative impact of extraneous noise and vibrations. The article presents the concept of vibration protection, the options and mechanism for selecting coatings, and an overview of the global market for vibration-proof materials. The most common methods of vibration protection are vibration isolation and vibration damping, implemented by using materials with appropriate properties. Vibration isolation of vehicles is carried out by surface treatment with special mastics or coating with substrates as well as with the usage of hydraulic vibration supports. To minimize the impact of vibrations on buildings and structures, special fastenings and suspensions, vibration isolators, supports, soft rolled and sheet materials are used. For vibration isolation of machine tools and precision equipment, separate supports, a layer of elastic material placed between the machine and the foundation, a floating floor on an elastic base are used. The article presents a brief analysis of metal, rubber and rubber-metal vibration isolation supports in the budget, medium and premium price segments. Vibration damping is performed using special plates, which are available on the market in the form of rolled materials and multilayer plates. Vibration-absorbing composite polymer coatings based on thermosetting polymers have become widespread. The industry of Russia and foreign countries has established the production of vibration-absorbing reinforced sheet materials. Russian scientists are also actively developing new types of coatings: gradient polymer composite materials, thermoplastic extrusion films, laminated fiberglass polymers, etc.

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Section: Vibration Isolation Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Concept of Vibration Protection and an Overview of the Global Market of Vibration Protection Materials

Domnina,

Nikitin,

Repko

et al. 2022

Intellekt. Sist. Proizv.

View full text Add to dashboard Cite

show abstract

“…This is only possible with a non-linear characteristic. It should be noted systems with quasi-zero stiffness, first proposed by Professor Alabuzhev P. M. [6]. These vibration protection systems have non-linear power characteristics with a quasi-zero stiffness section.…”

Section: Introductionmentioning

confidence: 99%

Vehicle suspension based on torsion bar and elastic hinge

Zotov,

Valeev,

Tokarev

2024

Liq., gas. energy resour.

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The article is devoted to the development of a vehicle suspension with a nonlinear characteristic based on a torsion bar and an elastic hinge with a given characteristic on the example of tracked vehicles for constructing oil and gas pipelines. The characteristic of the elastic hinge is such that when the existing torsion bar suspension and the elastic hinge are connected in parallel, the desired characteristic is obtained. For this non-linear characteristic in the static displacement region, low stiffness was obtained, but the total stored energy at the maximum deflection of the balance bar of the resulting suspension is greater than that of existing torsion suspensions. The smoothness of the tracked vehicles with a low stiffness of the suspension increases significantly. The calculation of vibrations of the proposed suspension under kinematic excitation was carried out. A harmonic function is considered as the trajectory of the profile; a function corresponding to a single obstacle and a function corresponding to an ascent to a ledge of a given height. The elastic hinge is a pneumatic spring moving between the guides of the design form. The force characteristic of the hinge depends on the shape of the guides and on the pressure in the air spring. The calculation of the circular shapes of the guides of the elastic hinge is given. The values of the forces arising between the pneumatic spring and the guides are determined.

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“…In particular, the theory of quasi-zero stiffness is characterized by high static stiffness and low dynamic stiffness, which has attracted more and more attention in the field of nonlinear vibration isolation. [6][7][8][9][10] In 1957, Molyneux first proposed the concept of quasi-zero stiffness, and classified and analyzed vibration isolation structures with different negative stiffness. 11 R.A. Ibrahim introduced the basic concepts and inherent nonlinear phenomenon of nonlinear vibration isolator, and summarized the specific types of nonlinear vibration isolators.…”

Section: Introductionmentioning

confidence: 99%

Dynamics and Stability of Magnetic-Air Hybrid Quasi-Zero Stiffness Vibration Isolation System

Jiang¹,

Song²,

Ma³

et al. 2023

The International Journal of Acoustics and Vibration

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With the improvement of machining accuracy, external low frequency vibration has become one of the most important factors affecting the performance of equipment. The theory of quasi-zero stiffness vibration isolation shows favorable low frequency vibration isolation effect. However, the theory, mechanical properties and dynamics of the system still need to be studied and expanded. Based on our previous research on the structure of a magnetic-air hybrid quasi-zero stiffness vibration isolation system, the nonlinear mechanical expression of positive and negative stiffness structure has been analyzed in this paper, to improve application of the system and provide a theoretical basis for sequential studies of active control. To provide the judgment criteria and basis for the application of quasi-zero stiffness, a more accurate quasi-zero stiffness mechanical model was to be established, and the judgement criterion and stability of quasi-zero stiffness was to be discussed and analyzed. Then, the dynamical model based on external low frequency vibration was developed, to investigate the stability and natural frequency. At the same time, the influence of different feedback parameters on the amplitude frequency characteristics has been discussed, which provides a basis for the future study of active control. Finally, we carried out simulation and experimental analysis to verify the stiffness of high static and low dynamic and the low frequency vibration isolation effect of the vibration isolation system.

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Vibration Isolating and Impact Protecting Systems with Quasi-Zero Stiffness Providing Wide Operating Area

Cited by 5 publications

References 16 publications

The Concept of Vibration Protection and an Overview of the Global Market of Vibration Protection Materials

The Concept of Vibration Protection and an Overview of the Global Market of Vibration Protection Materials

Vehicle suspension based on torsion bar and elastic hinge

Dynamics and Stability of Magnetic-Air Hybrid Quasi-Zero Stiffness Vibration Isolation System

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