Reducing Vibration of Reciprocating Engines with Crankshaft Pendulum Vibration Absorbers

Borowski, Victor J.; Denman, Harry H.; Cronin, D. L.; Shaw, Steven W.; Hanisko, J.P.; Brooks, Liana; Mikulec, Darryl; Crum, W. B.; Anderson, Matt

doi:10.4271/911876

Cited by 27 publications

(10 citation statements)

References 5 publications

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“…Modified versions of the simple pendulum version of the CPVA are currently used which employ a bifilar pendulum configuration so that noncircular paths may be employed (Denman, 1992;Borowski et al, 1991). This allows one to extend the effective range of operation by avoiding the bothersome nonlinear mistuning problems associated with circular paths.…”

Section: Introductionmentioning

confidence: 99%

“…since higher-order harmonics are amplified through nonlinear effects and some residual of the primary harmonic (about 8 percent) persists. The higher harmonics can be dealt with by the addition of absorbers tuned to higher orders (Borowski et al, 1991). It can be shown, however, that such an approach requires an infinite number of tautochronic absorbers to exactly cancel a pure single harmonic torque in the ideal, undamped case.…”

Section: Introductionmentioning

confidence: 99%

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A Subharmonic Vibration Absorber for Rotating Machinery

Lee

Shaw

Coppola

1997

Journal of Vibration and Acoustics

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A Subharmonic Vibration Absorber for Rotating IVIachineryWe demonstrate a dynamic vibration absorber system which can be used to reduce speed fluctuations in rotating machinery. The primary system is modeled as a simple rotating disk, and the idealized absorber system consists of a pair of equal point masses which are free to move along identical, prescribed paths relative to the disk. The unique features of the proposed arrangement are that the absorbers are tuned to one-half of the frequency of the applied torque and, more importantly, that they are effective in the fully nonlinear operating range. These absorbers can, in the undamped case, exactly cancel a pure harmonic applied torque of a given order without inducing any higher harmonics, thus rendering a perfectly constant speed of rotation. A perturbation method is used to extend the results to the small damping case and to investigate the dynamic stability of the desired motion. Simulations are used to verify the analysis and to demonstrate the effectiveness of the device. 590

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Subharmonic Vibration Absorber for Rotating Machinery

Lee

Shaw

Coppola

1997

Journal of Vibration and Acoustics

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“…In the equations of motion an expression for x G (s G ) for the general absorber path is needed (see equations (6,9)). The following expression can be obtained by expanding in s G ,…”

Section: General Path Representationmentioning

confidence: 99%

Performance and Dynamic Stability of General-Path Centrifugal Pendulum Vibration Absorbers

Alsuwaiyan

Shaw

2002

Journal of Sound and Vibration

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122

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“…From Eqs. (9) and (10), it is clear that the magnetic flux depends on both the cross sectional area and the core material.…”

Section: Magnetostatic Modelling Of Mr Dampermentioning

confidence: 99%

Semi-Active Control of Torsional Vibrations Using a New Hybrid Torsional Damper

Abouobaia¹,

Bhat²

2015

23rd AIAA/AHS Adaptive Structures Conference

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Torsional vibration is an important issue in many industrial applications with rotating mechanical components. Excessive torsional vibrations may result in noise, excessive stresses or even fatigue failure if not controlled expeditiously. The present research aims at developing a novel hybrid semi-active torsional vibration damper incorporating a conventional Centrifugal Pendulum Vibration Absorber (CPVA) and a Magnetorheological (MR) damper capable of suppressing torsional vibration under varying excitation frequencies. Two different strategies were carried out for controlling damping torque of the MR damper. First, the passive control approach of the MR damper is implemented in two cases, 1) When the applied current is set to zero, 2) When it is set to a constant value. The system response is investigated at resonance condition, when the excitation frequency coincides with the natural frequency of the system and torsional vibration response of the system is illustrated in each case. In the second approach, the semi-active Skyhook control algorithm with variable applied current is implemented for improving the performance of the hybrid damper. Torsional response of the system is illustrated in each case and compared with one another. NomenclatureC a Absorber viscous damping coefficient, N.m.s/rad C r Shaft viscous damping coefficient, N.m.s/rad J Rotor mass moment of inertia, kg.m 2 J d Disk mass moment of inertia, kg.m 2 J s Moment of inertia of shaft system including MR damper housing, kg.m 2 R Rotor radius, m T d

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Reducing Vibration of Reciprocating Engines with Crankshaft Pendulum Vibration Absorbers

Cited by 27 publications

References 5 publications

A Subharmonic Vibration Absorber for Rotating Machinery

A Subharmonic Vibration Absorber for Rotating Machinery

Performance and Dynamic Stability of General-Path Centrifugal Pendulum Vibration Absorbers

Semi-Active Control of Torsional Vibrations Using a New Hybrid Torsional Damper

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