NFR (Natural Frequency Region) approach for dynamic evaluation of anti-vibration systems with rebound resilience method

Luo, Robert Keqi; Guo, Ning; Chen, Xianmai

doi:10.1016/j.polymertesting.2016.12.001

Cited by 3 publications

(2 citation statements)

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“…For the readers’ convenience, we need to describe the NFR method first before the detailed impact simulation using the NFR–FSI approach. The NFR approach, developed from Rayleigh damping and proposed by Luo et al., 47 states that there are usually a number of natural frequencies within a range of interested frequencies in engineering applications. An NFR is defined as a response region containing only one natural frequency.…”

Section: Simulations and Comparisonsmentioning

confidence: 99%

“…However, in rubber antivibration applications, it has been found that simulated dynamic results are close to actual experimental data if the NFR method is used. 47 In this case, as the dynamic impact test is performed in the vertical direction, we need to choose the natural frequency (8.5 Hz) corresponding to a vibration mode in vertical direction based on the NFR method. Hence, the first NFR is selected and we have ω=ω1=ω2 and ξ=ξ1=ξ2.…”

Section: Simulations and Comparisonsmentioning

confidence: 99%

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Natural Frequency Region – Fluid-Structural-Interaction approach for dynamic impact predictions and experimental verification of rubber–metal bonded systems with fluid

Luo

Lou

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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This paper presents an integrated procedure for dynamic impact predictions and an experimental verification of rubber–metal bonded components with fluid to be used as a potential application in rail vehicle suspensions. There are three steps involved in the procedure. First, a quasi-static analysis was performed to verify the elastic properties of the rubber material using hyperelastic models. Second, a dynamic impact evaluation on selected hydro-mounts without fluid was conducted using the Natural Frequency Region (NFR) approach. Finally, a coupled NFR (with Fluid-Structural-Interaction) approach, different from the usual viscoelastic methods, was initiated to predict the dynamic impact responses of these components with the fluid in time domain. All the analyses have been validated with experimental data. The first two stages have been briefly described and the third stage is detailed in this paper. It should be noted that a powerful computer with multi-central processing units is essential to obtain a reasonable result within an acceptable time frame. It took approximately 40 h wall-clock time to complete the analysis using a workstation with 10 central processing units. It has been suggested that the natural frequency region–fluid–structure interaction methodology is reliable and could be used at the design stage and for engineering applications.

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Section: Simulations and Comparisonsmentioning

confidence: 99%