Vibration power flow and force transmission behaviour of a nonlinear isolator mounted on a nonlinear base

Yang, Jian; Xiong, Yeping; Xing, Jing Tang

doi:10.1016/j.ijmecsci.2016.06.023

Cited by 60 publications

(22 citation statements)

References 26 publications

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“…[18] for the basic concept and definition of vibration power flow as well as its application to dynamic analysis of linear and nonlinear vibration suppression systems as in refs. [2,19,20,22,26,25]. In the steady-state motion, the non-dimensional time-averaged input and dissipated powers over one period of the external excitation arē…”

Section: Discussionmentioning

confidence: 99%

“…Note that other performance indicators such as timeaveraged power flow transmission and kinetic energy of the mass have also been used in previous studies of linear and nonlinear vibration isolators [2,18,19,25,31]. A power flow analysis is carried out for the current nonlinear NIM QZS mount and the detailed formulations are provided in the Appendix.…”

Section: Force Transmissibilitymentioning

confidence: 99%

“…Vibration power flow analysis (PFA) approach has been widely used to assess the performance of linear vibration mitigation systems [18,19], including linear inerter-based vibration isolators [20,21]. This approach has been developed to reveal dynamics of nonlinear systems from energy flor viewpoint [22,23,24], and to evaluate nonlinear isolators [2,25] and dynamic vibration absorbers [26] .…”

Section: Introductionmentioning

confidence: 99%

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Dynamic analysis and performance evaluation of nonlinear inerter-based vibration isolators

2019

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This paper investigates a nonlinear inertance mechanism (NIM) for vibration mitigation and evaluates the performance of nonlinear vibration isolators employing such mechanism. The NIM comprises a pair of oblique inerters with one common hinged terminal and the other terminals fixed. The addition of the NIM to a linear spring-damper isolator and to nonlinear quasizero-stiffness (QZS) isolators is considered. The harmonic balance method is used to derive the steadystate frequency-response relationship and force transmissibility of the isolators subject to harmonic force excitations. Different performance indices associated with the dynamic displacement response and force transmissibility are employed to evaluate the performance of the resulting isolators. It is found that the frequency response curve of the inerter-based nonlinear isolation system with the NIM and a linear stiffness bend towards the low-frequency range, similar to the characteristics of the Duffing oscillator with softening stiffness. It is shown that the addition of NIM to a QZS isolator enhances vibration isolation performance by providing a wider frequency band of low amplitude response and force transmissibility. These findings provide a better understanding of the functionality of the NIM and assist in better designs of nonlinear passive vibration mitigation systems with inerters.

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Section: Discussionmentioning

confidence: 99%

Section: Force Transmissibilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic analysis and performance evaluation of nonlinear inerter-based vibration isolators

2019

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“…More than one mode could be decayed by this damped mount. Later, many literatures concerned the usage of power flow in quantifying the nonlinear vibration isolation with flexible base [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Power Flow in a Two‐Stage Nonlinear Vibration Isolation System with High‐Static‐Low‐Dynamic Stiffness

Shao

Ding

2018

Shock and Vibration

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The manuscript concerns the power flow characterization in a two-stage nonlinear vibration isolator comprising three springs, which are configured so that each stage of the system has a high-static-low-dynamic stiffness. To demonstrate the distinction of evaluation for vibration isolation using power flow, force transmissibility is used for comparison. The dynamic behavior of the isolator subject to harmonic excitation, however, is of interest here. The harmonic balance method (HBM) could be used to analyze the frequency response curve (FRC) of the strong nonlinear vibration system. A suggested stability analysis to distinguish the stable and the unstable HBM solutions is described. Increasing both upper and lower nonlinear stiffness could bend the first resonant peak to the left. The isolation range in the power and the force transmissibility plot could be extended to the lower frequencies when the nonlinear stiffness is increased, but the rate of roll-off for the power transmissibility is twice the rate for the force transmissibility at each horizontal stiffness setting. An explanation for this phenomenon is given in the paper.

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“…For decades, many mechanisms related to passive-type mount modules have been studied for different target systems to control the transmissibility of vibration responses [11][12][13][14][15][16]. Since the variation of mechanical properties is not allowable in a passive-type mount device, the system identification and the reliable design sensitivity should be performed during the selection of the characteristics of the mount module [17][18][19][20], and this is difficult in the case of nonlinear behavior in either the mount module itself or the relevant supporting system [21][22][23]. One of the applications of passive-type mount modules is in a power plant in which they are operated in emergency events, such as blackouts, to isolate the harsh excitation arising from the internal combustion engine.…”

Section: Introductionmentioning

confidence: 99%

Design Criterion of Damper Component of Passive-Type Mount Module without Using Base Mass-Block

Kim

2018

Energies

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Passive-type mount modules have been used frequently to isolate excitation from the target mechanical system, and electric power plants use the mount devices to control the harmonic excitation source from a combustion engine. The mount structure is composed of a spring component, a stacked thin-panel, and a heavy base-mass block, and installation as well as maintenance of the structures are difficult. To tackle this problem associated with mount modules, I investigate in this work the feasibility of a simplified mount module with no base mass-block; the harmonic frequency of interest was selected from 30 (Hz) to 120 (Hz) owing to the constant rotating speed of the combustion engine at 1800 (rev/min). The design criterion of the damper components was formulated from the response index at the electric power plant, and the influence of the damper component at the proposed mount was calculated theoretically from the linearized system models. The theoretical result was compared with the measured response index at the electric power plant, and the comparison result revealed the superior capability of the proposed mount module in controlling the reaction motion at the electric power plant.

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Vibration power flow and force transmission behaviour of a nonlinear isolator mounted on a nonlinear base

Cited by 60 publications

References 26 publications

Dynamic analysis and performance evaluation of nonlinear inerter-based vibration isolators

Dynamic analysis and performance evaluation of nonlinear inerter-based vibration isolators

Power Flow in a Two‐Stage Nonlinear Vibration Isolation System with High‐Static‐Low‐Dynamic Stiffness

Design Criterion of Damper Component of Passive-Type Mount Module without Using Base Mass-Block

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