Vibration isolation between non-rigid machines and non-rigid foundations

Soliman, J. I.; Hallam, M.G.

doi:10.1016/0022-460x(68)90236-8

Cited by 42 publications

(24 citation statements)

References 7 publications

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“…Substitution of the assumed exponential solution into equation (3) leads to the following characteristic equation and two categories of roots [16]:…”

Section: Mobilities Of a Finite Timoshenko Beammentioning

confidence: 99%

“…(2) Compare the Timoshenko and Euler beam solutions for the e!ects of shear deformation and rotary inertia of an isolator on vibration power attenuation measures. (3) Investigate the role of isolator parameters such as the static sti!ness ratios, shape factors and material properties on isolation measures over a broad range of frequencies.…”

Section: Problem Formulationmentioning

confidence: 99%

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Vibration Transmission Through an Isolator Modelled by Continuous System Theory

Kim

Singh

2001

Journal of Sound and Vibration

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“…Substitution of the assumed exponential solution into equation (3) leads to the following characteristic equation and two categories of roots [16]:…”

Section: Mobilities Of a Finite Timoshenko Beammentioning

confidence: 99%

Section: Problem Formulationmentioning

confidence: 99%

Vibration Transmission Through an Isolator Modelled by Continuous System Theory

Kim

Singh

2001

Journal of Sound and Vibration

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“…The isolation method is a common and usual method that is implemented for the reduction of unbalanced vibrations of rotary mechanisms and engines, (Soliman & Hallam, 1968) and in which a flexible platform isolator is taken into consideration for absorbing the vibrations to stop them from damaging other parts and components. An alternative method used for the reduction of the vibrations caused by rotary engines is the active vibration control method (Ruzicka, 1969;Vilnay, 1984).…”

Section: Introductionmentioning

confidence: 99%

Designing a 2-Degree of Freedom Model of an Unbalanced Engine and Reducing its Vibrations by Active Control

Mohebbi¹,

Hashemi²

2017

IJTech

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In this paper, a 2-degree of freedom dynamic model of an unbalanced rotary engine is designed, in a manner that has the effect of modal coupling. After designing the dynamic model in order to reduce the vibrations generated due to the unbalancing mass and modal coupling, the active force control (AFC) method is implemented along with a conventional proportional integral derivative (PID) controller with linear actuators, meaning that the AFC loop is applied as a supplement to the conventional PID controller. The obtained results show that, when the AFC loop was engaged with the PID controller, the vibrations were reduced to nearly zero in both aspects of frequency and amplitude when compared to the case in which only a PID controller was operating in the control system.

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“…Research objects have been developed from rigid models [15,16] to flexible ones [17][18][19], and the performance index has been developed from force or velocity indices [20][21][22] to power flow indices [17,18,23]. Du [24] found that the force transmissibility increased 20∼30 dB, and the noise radiated by the foundation increased about 22 dB when wave effects of isolators are considered.…”

Section: Introductionmentioning

confidence: 99%

Vibratory Power Flow Analysis of a Gear‐Housing‐Foundation Coupled System

Ren

Chang

Liu

et al. 2018

Shock and Vibration

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The marine gearbox is usually installed on a vibration isolation system in order to reduce oscillation transmitted to the ship foundation. However, researches on vibration transmission in the gear-housing system and isolation system are currently independent. With the increasing requirement of lower vibration, a coupled model needs to be built to control the vibration propagation from a view of the whole system. Considering the mesh transmission error excitation of a gear pair, a flexible gearhousing-foundation coupled impedance model is constructed in this paper, and the vibratory power flow of the whole system is calculated. Power transmissions between three different gearbox installation configurations, that is, rigid installation, singlestage isolation, and double-stage isolation, are compared. Taking the single-stage isolation configuration as an example, parameter influences on the vibration of the foundation are studied. Results show that double-stage isolation can achieve lower vibration than single-stage isolation; decrease in bearing stiffness or Young's modulus of isolator will yield better vibration isolation performance; housing damping and isolator damping are beneficial to vibration reduction.

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Vibration isolation between non-rigid machines and non-rigid foundations

Cited by 42 publications

References 7 publications

Vibration Transmission Through an Isolator Modelled by Continuous System Theory

Vibration Transmission Through an Isolator Modelled by Continuous System Theory

Designing a 2-Degree of Freedom Model of an Unbalanced Engine and Reducing its Vibrations by Active Control

Vibratory Power Flow Analysis of a Gear‐Housing‐Foundation Coupled System

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