Friction Damping and Isolation Systems

1995 ◽  
Vol 117 (B) ◽  
pp. 196-206 ◽  
Author(s):  
A. A. Ferri
Keyword(s):  
Energy Dissipation ◽  
System Performance ◽  
Dry Friction ◽  
Vibration Isolation ◽  
Analytical Techniques ◽  
Experimental Treatment ◽  
Structural Systems ◽  
Friction Damping ◽  
Isolation Systems ◽  
Damped Systems

This paper surveys the literature on the use of dry friction in passive damping and vibration isolation. Several analytical techniques are presented followed by applications from various areas. Despite difficulties in the analytical and experimental treatment of friction damped systems, numerous studies have endeavored to predict, measure, and/or enhance the energy dissipation and vibration isolation properties of dry friction in order to improve system performance. Undoubtedly, friction damping will continue to play an important role in many mechanical and structural systems.

Friction Damping and Isolation Systems

1995 ◽  
Vol 117 (B) ◽  
pp. 196-206 ◽  
Author(s):  
A. A. Ferri
Keyword(s):  
Energy Dissipation ◽  
System Performance ◽  
Dry Friction ◽  
Vibration Isolation ◽  
Analytical Techniques ◽  
Experimental Treatment ◽  
Structural Systems ◽  
Friction Damping ◽  
Isolation Systems ◽  
Damped Systems

This paper surveys the literature on the use of dry friction in passive damping and vibration isolation. Several analytical techniques are presented followed by applications from various areas. Despite difficulties in the analytical and experimental treatment of friction damped systems, numerous studies have endeavored to predict, measure, and/or enhance the energy dissipation and vibration isolation properties of dry friction in order to improve system performance. Undoubtedly, friction damping will continue to play an important role in many mechanical and structural systems.

Resonance Characteristics of Unidirectional Viscous and Coulomb-Damped Vibration Isolation Systems

1967 ◽  
Vol 89 (4) ◽  
pp. 729-740 ◽  
Author(s):  
Jerome E. Ruzicka
Keyword(s):  
Resonant Frequency ◽  
Vibration Isolation ◽  
Elementary Theory ◽  
Rate Of Change ◽  
Design Data ◽  
Isolation System ◽  
Extensive Evaluation ◽  
Wide Range ◽  
Isolation Systems ◽  
Damped Systems

Elementary vibration theory based on transfer response analyses of single-degree-of-freedom systems indicates that an increase in isolation system damping causes a decrease in resonant transmissibility. This theory further specifies that, for viscous-damped systems, an increase in damping decreases the resonant frequency whereas, for Coulomb-damped systems, an increase in damping increases the resonant frequency. It is frequently found in practice that an increase in damping may increase the resonant transmissibility and cause a change in resonant frequency opposite to that predicted by elementary theory. This paper presents a more extensive evaluation of the resonance characteristics of unidirectional vibration isolation systems, including the effects of directly coupled and elastically coupled damping elements. Mathematical models and absolute transmissibility characteristics of viscous and Coulomb-damped vibration isolation systems are discussed and resonance characteristics are analyzed in terms of the resonant frequency ratio, the resonant transmissibility, and the rate of change of these parameters with damping. Design data are presented graphically for parametric variations of stiffness and damping which are sufficiently broad to encompass a wide range of practical engineering problems.

Optimization on hysteresis dynamic model of metal rubber material based on dry friction damping term

2021 ◽  
pp. 095440622110197
Author(s):  
Hailong Fu ◽  
Yiwen Tao ◽  
Yue Wang ◽  
Longqing Zou ◽  
Yiqi Mao
Keyword(s):  
Parameter Identification ◽  
Dynamic Model ◽  
Dry Friction ◽  
Vibration Isolation ◽  
Material Structure ◽  
Damping Term ◽  
Friction Damping ◽  
Element Analysis ◽  
Metal Rubber ◽  
Dry Friction Damping

As one kind of porous elastic metal material, metal rubber is used in vibration isolation widely due to its better damping characteristic. During loading and unloading, the elastoplastic deformation and damping characteristics of this material are usually described by constructing its dynamic model. Although traditional models can describe the hysteresis performance, the accurate parameter identification of material structure under different preparation conductions is limited due to its complex expression or equivalent math form. In this paper, a dynamic hysteresis model is optimized through adding a dry friction damping term based on the micro-element analysis theory and analysis method of material mesoscopic structure. The relation among the manufacture technic, size of metal wire and vibration parameters were established, which accurately describes hysteresis characteristic of metal rubber by dry friction when the metal wires are in the state of slipping contact. The result is verified by the harmonic vibration experiment that the model has good adaptability and convenience, especially can improve the accuracy and convenience of parameter identification on the forming materials of metal rubber.

Effect of Intentional Dry Friction Damping on the Performance of an Elastomeric Engine Mount

2010 ◽  
Author(s):  
Caner Boral ◽  
Ender Cig˘erog˘lu ◽  
I˙brahim Korkmaz
Keyword(s):  
Dry Friction ◽  
Vibration Isolation ◽  
Wide Frequency Range ◽  
Friction Damper ◽  
Friction Damping ◽  
Automotive Engine ◽  
Engine Mounts ◽  
Initial Cost ◽  
Engine Mount ◽  
Dry Friction Damping

Automotive engine mounts are used to protect engine from road irregularities and to isolate transmission of vibrations created by the engine which have a drastic effect on the noise generated inside the passenger cabin. Most common types of engine mounts are elastomeric and hydraulic mounts, the former having better vibration isolation characteristics whereas the latter displays better shock isolation. Elastomeric mounts are widely used for their low initial cost, while hydraulic mounts with inertia track and decoupler are chosen for their good vibration isolation and shock excitation characteristics. However, hydraulic mounts with inertia track and decoupler are not appropriate for small segment and commercial vehicles due to their high initial cost. In this paper, the effect of the addition of a dry friction damper on the performance of elastomeric automobile engine mounts is investigated. Results showed that addition of dry friction damping to the elastomeric engine mount significantly improves the transmissibility throughout a wide frequency range where the best results are obtained at the resonance frequency.

Study of Characteristics of Dry Friction Damping.

1985 ◽  
Author(s):  
A. V. Srinivasan ◽  
B. N. Cassenti ◽  
D. G. Cutts
Keyword(s):  
Dry Friction ◽  
Friction Damping ◽  
Dry Friction Damping
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