An Integrated Approach for Friction Damper Design

Cameron, Timothy M.; Griffin, J. H.; Kielb, Robert E.; Hoosac, T. M.

doi:10.1115/1.2930110

Cited by 55 publications

(34 citation statements)

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“…The curve of X /N r versus P o /N r is called damper performance curve [2]. The advantage of this representation is that it provides a design point which is independent of excitation levels in the engine.…”

Section: Damper Performance Curvementioning

confidence: 99%

Modelling and design of friction damper used for the control of vibration in a gas-turbine blade - a microslip approach

Ramaiah¹,

Krishnaiah

2007

Proceedings of the Institution of Mechanical Engineers, Part C:

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The paper deals with modelling and design of a friction damper. This has been done in four phases. In the first phase, modal analysis is performed to determine the modal parameters of turbine blade. In the second phase, a mathematical model for the contact region of damper and rigid surface has been developed using microslip approach. This model has the ability to account for microslip in the contact region. In the third phase, a mathematical model for the combined blade with damper is developed and in the fourth phase the damper is designed. The results of the combined blade with damper model are confirmed by experimental test.

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Section: Damper Performance Curvementioning

confidence: 99%

Modelling and design of friction damper used for the control of vibration in a gas-turbine blade - a microslip approach

Ramaiah¹,

Krishnaiah

2007

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…When the relative motion stays on the contact plane, the contact normal load remains constant during the course of motion and the interface experiences stick-slip friction induced by the tangential motion. This type of contact kinematics arises from either the specific design of friction contact [3,4] or from the simplification of the analysis [5,6]. More generally, if the relative motion has normal component perpendicular to the contact plane, the normal motion will cause normal load variation and possible intermittent separation of the two contacting surfaces.…”

Section: Introductionmentioning

confidence: 99%

A microslip friction model with normal load variation induced by normal motion

Ciğeroğlu

Menq

2007

Nonlinear Dyn

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A two-dimensional microslip friction model with normal load variation induced by normal motion is presented in this paper. The model is a distributed parameter model, which characterizes the stick-slipseparation of the contact interface and determines the resulting friction force, including its time variance and spatial distribution, between two elastic structures. When the relative motion is simple harmonic motion, the stick-slip-separation transition angles associated with any point in the contact area can be analytically determined within a cycle of motion. In addition, if the relative motion is given, stick-slip-separation transition boundaries inside the contact area and their time variances can be determined. Along with an iterative multi-mode solution approach utilizing harmonic balance method (HBM), the developed model can be employed to determine the forced response of frictionally constrained structures. In the approach, the forced response is constructed in terms of the free mode shapes of the structure; consequently, it can be determined at any excitation frequency and for any type of normal load distribution. Two examples, a one-dimensional beam like damper and a more realistic blade to ground damper, are employed to illustrate the predictive abilities of the developed model. It is shown that while employing a single mode model, transition boundaries for the beam like damper agrees with the results given in the literature, the developed method identifies the phase difference along the slip to stick transition boundary when a multi-mode model is employed. Moreover, while partial slip is illustrated in the two examples, typical softening and hardening effects, due to separation of the contact surface, are also predicted for the blade to ground damper.

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“…Their masses is usually negligible regarding the damped structure whereas there effects on maximum stress or displacement can be drastic. In gas turbines, under platform friction dampers for example are often used to reduced vibratory stresses in turbine blades (see ref [1]). It is well known that gears are good resonators with low structural damping factor.…”

Section: Introductionmentioning

confidence: 99%

Theory and design of damping rings in highly loaded gears submitted to propagating waves vibrations on diameter modes

Colette

2014

International Gear Conference 2014: 26th–28th August 2014, Lyon

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An Integrated Approach for Friction Damper Design

Cited by 55 publications

References 0 publications

Modelling and design of friction damper used for the control of vibration in a gas-turbine blade - a microslip approach

Modelling and design of friction damper used for the control of vibration in a gas-turbine blade - a microslip approach

A microslip friction model with normal load variation induced by normal motion

Theory and design of damping rings in highly loaded gears submitted to propagating waves vibrations on diameter modes

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