Designing of Compact Low Frequency Vibration Isolator with Quasi-Zero-Stiffness

Valeev, Anvar; Зотов, А. Н.; Kharisov, Shamil

doi:10.1260/0263-0923.34.4.459

Cited by 59 publications

(36 citation statements)

References 10 publications

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“…A cubic fit confirms this behaviour, which has been suggested previously by several studies. 14 The actual stiffness plot presented in Figure 5 represents the immediate, or tangential stiffness as a function of the displacement demonstrating the lower value of stiffness, thus an optimal loading setting can be established for the isolators studied. In practice, one would want to establish an equilibrium point around the minimum stiffness value, the required load to attain this point is hence referred as the optimum load.…”

Section: Discussion Of the Experimental Resultsmentioning

confidence: 99%

Experimental characterisation of dry friction isolators for shock and vibration

Tapia-González

Ledezma-Ramírez

2017

Journal of Low Frequency Noise, Vibration and Active Control

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Shock and vibration are a source of failures in harsh environments such as military, naval and aerospace applications; thus, the use of vibration isolators is extended. Cable isolators are known for their high-energy storage and dissipation properties making them suitable for shock isolation and low frequency vibration. Such isolators present nonlinear stiffness in different directions such as compression, roll and shear, as well as dry friction damping. Although their use is extended, the knowledge regarding their dynamic response under shock loading is very limited. This work presents an overview of the vibration and shock isolation performance of several cable isolators under axial loading. The main contribution of the paper is to investigate and discuss the shock response of the isolators when subjected to pulses of different durations, finding improved isolation performance when compared to an equivalent linear system. Furthermore, a mathematical model based on a Duffing oscillator is proposed as a first approximation, in order to reflect the nonlinear stiffness and predict the shock response, thus facilitating further design and selection of improved shock isolation systems.

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Section: Discussion Of the Experimental Resultsmentioning

confidence: 99%

Experimental characterisation of dry friction isolators for shock and vibration

Tapia-González

Ledezma-Ramírez

2017

Journal of Low Frequency Noise, Vibration and Active Control

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“…Note that elastic structures and materials with a nonlinear force characteristic with an almost flat section are called as systems with quasi-zero stiffness [3]. Such systems are currently actively developed in the field of protection against vibration and shock, since they ensure the almost complete absence of transmitted dynamic force, which makes them extremely effective for vibration isolation [4,5]. Providing almost zero (quasi-zero) stiffness at a certain load allows simultaneously obtaining low natural frequency, wide range of isolable frequencies.…”

Section: Vibration Isolating Metamaterials With Quasi-zero Stiffnessmentioning

confidence: 99%

Complex condition monitoring for industrial equipment via remote strain gauge diagnostics and vibration isolating metamaterials

Valeev¹

2019

Vib. proced.

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Complex condition monitoring for industrial equipment is offered in this paper. The complex monitoring consists of three parts. The first part contains careful diagnostics of defects. It was greatly improved by using a new method of identification of excitation sources. This method is based on defect location with the help of remote strain gauge control and detects the exact coordinates of the detected defects. The second part covers vibration isolation of industrial equipment. For this purpose, metamaterials with quasi-zero stiffness are offered. They can almost totally isolate dynamic forces passing through them. The third part is dedicated to decrease oscillations of the equipment via dynamic absorbers. Their application can be improved by careful control of adjustment. It is offered to control the phase of oscillations on two ends of the spring.

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“…Many scientists study systems with quasi-zero stiffness, for example Alabuzhev [1], Carrella [2], the author [3,4,5], etc. Different active methods of vibration isolation can also be used to create a system quasi-zero stiffness.…”

Section: About Quasi-zero Stiffness Effectmentioning

confidence: 99%