Dynamic stiffness and loss factor measurement of engine rubber mount by impact test

Ooi, Lu Ean; Ripin, Zaidi Mohd

doi:10.1016/j.matdes.2010.12.015

Cited by 58 publications

(31 citation statements)

References 19 publications

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“…This means that the optimum orientation angles will reduce the force transmissibility in Z-and Y-directions with a corresponding increase in the force transmissibility in the X-direction. The increase in the orientation angle of the engine mount in the Z-direction exhibits a similar effect when changing the engine mount from its compression direction to its shear direction, subsequently altering the stiffness of the engine mount because the effects of the orientation angles on the dynamic properties of the engine mount are significant (Park and Singh, 2009b;Ooi and Ripin, 2010). This in turn affects the transmissibility of the engine mount (Ahn et al, 2005).…”

Section: Optimization Resultsmentioning

confidence: 94%

“…n is the resonant frequency of the system. The loss factors in compression mode z ð!Þ and shear mode x=y ð!Þ are also described by Ooi and Ripin (2011) as…”

Section: Dynamic Characterization Of the Engine Rubber Mounts And Curmentioning

confidence: 99%

“…Frequency-dependent properties of nonlinear passive vibration isolators of an engine mounting system have been determined by Ibrahim (2008). These properties can be determined using the impact technique (Lin et al, 2005;Ooi and Ripin, 2011). Frequency-dependent properties have been shown to better represent the behavior of rubber mount elements in actual application (Jeong and Singh, 2001;Rivin, 2003), and these properties have been implemented in the analytical model of a powertrain mounting system Singh, 2009a, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Optimization of an engine mounting system with consideration of frequency-dependent stiffness and loss factor

Ooi

Ripin

2014

Journal of Vibration and Control

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An engine mounting system is the primary vibration isolator of the engine from the chassis. The frequency-dependent stiffness and loss factor present a more accurate representation of a rubber mount as opposed to the frequencyindependent damping model. In this article, dynamic optimization of an engine mounting system considering the frequency-dependent stiffness and loss factor is presented. The dynamic properties in all three principal directions are measured on the basis of the optimum locations and orientation angles of the individual engine mounts, which are identified to minimize the mean force transmissibility of the system for a range of frequencies, resulting in a 45% reduction in the vertical transmissibility to the installation base. In comparison, optimization based on a frequencyindependent stiffness underestimated the peak transmissibility, and minimization of the vertical force transmissibility created a significant increase in other directions. The optimum parameters are applied to a small utility two-stroke engine. A significant reduction in the transmitted force and engine displacement is demonstrated.

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Section: Optimization Resultsmentioning

confidence: 94%

“…n is the resonant frequency of the system. The loss factors in compression mode z ð!Þ and shear mode x=y ð!Þ are also described by Ooi and Ripin (2011) as…”

Section: Dynamic Characterization Of the Engine Rubber Mounts And Curmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of an engine mounting system with consideration of frequency-dependent stiffness and loss factor

Ooi

Ripin

2014

Journal of Vibration and Control

Self Cite

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“…Frequently, linear or finite viscoelastic formulations are derived and applied. Experimental data and constitutive theories to describe such behavior have been proposed (Pan, 1996;Yang et al, 2000;Lin and Schomburg, 2003;Reese, 2003;Amin et al, 2006;Gil-Negrete et al, 2006;GarcıaTarrago et al, 2007;Rendek and Lion (2010a,b), Blom and Kari, 2011, Ooi and Ripin, 2011, Austrell and Olsson, 2012, Wollscheid and Lion, 2013Lindberg et al, 2014;Österlöf et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

A finite viscoelastic constitutive model for filled rubber-like materials

Dong

Liao

2015

International Journal of Solids and Structures

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a b s t r a c tFilled rubber-like materials show a significant dependence on predeformation, frequency and amplitude when they are loaded with static predeformations superimposed by harmonic deformations. In order to investigate this predeformation-, frequency-and amplitude-dependent material behavior, a recently developed constitutive model of finite viscoelasticity is proposed based on the models of Lion and Kardelky (2004) and Hofer and Lion (2009). The constitutive equations are geometrically linearized in the neighborhood of predeformation and then formulated for incompressible materials. Finally, the process of parameter identification and some numerical aspects are shown. Additionally, the experimental verification and some numerical simulations will also be supplied. The results show that our model cannot only be used for loading cases with small strains but also with large strains. It may have some meanings for practical engineering applications.

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“…The track stiffness can also be classified into dynamic stiffness and static stiffness [2,5,6]. The resistance of track structure to deformation under a static load is called as static stiffness, which, usually, is determined by the deformation degree of track structure under the static load.…”

Section: Introductionmentioning

confidence: 99%

Overview and outlook on railway track stiffness measurement

Wang

Chen

et al. 2016

J. Mod. Transport.

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Stiffness is one of the basic performance parameters for railway track. The efficient and accurate stiffness measurement has been considered as the foundation for further development of railway engineering, and therefore has great theoretical and practical significance. Based on a summary of the connotation and measurement of track stiffness, the state of the art of measurement methods for track stiffness was analyzed systematically. The standstill measurement of track stiffness can be performed with the traditional jack-loading method, impact hammer method, FWD (falling weight deflectometer) method, and track loading vehicle method. Although these methods can be adopted in stiffness measurement for a section of railway track, they are not desirable owning to small range and low efficiency. In the recent 20 years, researchers have proposed many methods like unbalancedloading laser displacement method, deflection basin deformation rate method, and eccentricity excitation method to continuously measure track stiffness; however, these methods have drawbacks like poor accuracy, low speed, and insufficient data analysis. In this work, the merits and demerits of these methods were summarized, and optimization suggestions were presented. Based on the wave transmission mechanism and principle of vibration energy harvesting, an overall conception on continuous measurement of stiffness and long-term stiffness monitoring for special sections was proposed.

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Dynamic stiffness and loss factor measurement of engine rubber mount by impact test

Cited by 58 publications

References 19 publications

Optimization of an engine mounting system with consideration of frequency-dependent stiffness and loss factor

Optimization of an engine mounting system with consideration of frequency-dependent stiffness and loss factor

A finite viscoelastic constitutive model for filled rubber-like materials

Overview and outlook on railway track stiffness measurement

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