Effect of Dry Friction Damping on the Dynamic Response of Helicopter Tail Shaft

Ozaydin, Onur; Ciğeroğlu, Ender

doi:10.1007/978-3-319-54648-3_3

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…Viscous internal damping of metal materials is trivial compared with composite materials, even ignored in Ozaydin and Cigeroglu. 4 Therefore, ζ ¯ s = 0 , ζ ¯ s = 0 . 00538 , ζ ¯ s = 0 . 0106 are set, corresponding to Hopf boundary curves HP 0 , HP 1 , HP 2 , respectively. Other parameters are shown in Table 1.…”

Section: Simulation and Discussionmentioning

confidence: 99%

“…By substituting equation (2) into equation (1), multiplying the two sides of the equation by F r (x), integrating x over X-axis, then using the orthogonality of the modal function, the differential equations are obtained, (4) r (x)dx…”

Section: Mathematical Formulation and Condition Of Contact Occurrencementioning

confidence: 99%

“…2 Dry friction damper, as shown in Figure 1, is used in the certain helicopter tailrotor drivelines as an effective damper with the advantages of simplicity, reliability, and so on. 3,4 The most important component of the damper is a damping ring, which is confined to the base by springs and has radial clearance between itself and the sleeve fixed on the shaft. The whirl of the shaft is restricted by the damping ring, which leads to the relationship between the shaft and the dry friction damper is similar to the rub-impact of the rotor-stator system.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phase difference and stability of a shaft mounted a dry friction damper: Effects of viscous internal damping and gyroscopic moment

Huang

Tan

Lu³

2021

Advances in Mechanical Engineering

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This study investigates the stability and phase difference of a shaft mounted a dry friction damper with effects of viscous internal damping and gyroscopic moment. The equations of the system with the vibration reduction effect of the dry friction damper on the shaft are derived in the form of the rectangular coordinate and polar coordinate in the vicinity of critical speed. The phase difference characteristics in the rub-impact process and its physical mechanism are analyzed by mathematical derivation. The characteristic equation is studied to investigate the stability of the periodic solution. Effects of different parameters of the system, especially viscous internal damping of the composite shaft and gyroscopic moment on the phase difference and stability regions are presented in detail by analytical and numerical simulation based on a helicopter tailrotor driveline. The experimental investigation is conducted in a test rig to validate theoretical formulas and simulation analysis. The analysis results show that rub impact delays the change of phase difference, viscous internal damping improves the stability of synchronous full annual rub solution, and gyroscopic moment affects the increase of the phase difference.

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Section: Simulation and Discussionmentioning

confidence: 99%

Section: Mathematical Formulation and Condition Of Contact Occurrencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase difference and stability of a shaft mounted a dry friction damper: Effects of viscous internal damping and gyroscopic moment

Huang

Tan

Lu³

2021

Advances in Mechanical Engineering

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“…The solution of the nonlinear system under the three different mechanical models was obtained respectively by the harmonic balance method and Newton method. The effects of critical dry friction force, initial clearance between shaft and damper and location of the damper on vibration damping capacity were further analyzed ( € Ozaydın, 2017;€ Ozaydin and Cigeroglu, 2017). However, the tangential rub-impact force between shaft and damper which seriously affects the dynamic characteristics of the system was ignored in his study.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear vibration response of a helicopter supercritical tail rotor drive shaft equipped with a dry friction damper

Song

Chen

et al. 2022

JIMSE

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PurposeThe supercritical design of tail rotor drive shaft has attracted more attention in helicopter design due to its high power–weight ratio and low maintenance cost. However, there exists excessive vibration when the shaft passes through the critical frequency. Dry friction damper is the equipment applied to the drive shaft to suppress the excessive vibration. In order to figure out the damping mechanism of the dry friction damper and improve the damping efficiency, the dynamic model of the shaft/damper system is established based on the Jeffcott rotor model.Design/methodology/approachThe typical frequency response of the system is studied through bifurcation diagrams, amplitude-frequency characteristic curves and waterfall frequency response spectrum. The typical transient responses under frequency sweeps are also obtained.FindingsThe results show that the response of the system changes from periodic no-rub motion to quasi-periodic rub-impact motion, and then to synchronous full annular rub-impact, and finally, back to periodic no-rub motion. The slip of the rub-impact ring improves the stability of the system. Besides, the effects of the system parameters including critical dry friction force, rub-impact friction coefficient, initial clearance on the stability and the vibration damping capacity are studied. It is observed that the stability changes significantly varying the three parameters respectively. The vibration damping capacity is mainly affected by the critical dry friction force and the initial clearance.Originality/valuePresented results provide guidance for the design of the dry friction damper.

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“…Zhang et al [27] described an efficient method to predict the nonlinear steady-state response of a complex structure with multiscattered friction contacts and analyzed the nonlinear response of the blade with underplatform dampers. Ozaydin and Cigeroglu [28] used onedimensional macroslip friction model with constant normal load to model the dry friction damper and investigated the effect of dry friction damping on vibration attenuation of helicopter tail shaft.…”

Section: Introductionmentioning

confidence: 99%

Study on the Nonlinear Characteristics of a Rotating Flexible Blade with Dovetail Interface Feature

Shen

Zhong

et al. 2018

Shock and Vibration

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A dynamic model is proposed in this paper for analyzing the nonlinear characteristics of a flexible blade. The dynamical equation of motion for a rotational flexible blade in a centrifugal force field is established based on the finite element method. A macro-stickslip mechanical model of dry friction is established to simulate the constraint condition of the flexible blade. The combined motion of the external excitation and friction produces a piecewise linear vibration which is actually nonlinear. The numerical integration method is employed to calculate the vibration reduction characteristics of the nonlinear constrained rotating blade. The results show that the nonlinear dry friction force produced by the dovetail interface plays an important role in vibration reduction. And the effect of dry friction vibration reduction is significant when the rotating speed is slow or the friction coefficient is small. Besides, the magnitude of external excitation also has a great impact on the state of the friction. Therefore, some relevant experimental researches should be done in the future.

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Effect of Dry Friction Damping on the Dynamic Response of Helicopter Tail Shaft

Cited by 7 publications

References 8 publications

Phase difference and stability of a shaft mounted a dry friction damper: Effects of viscous internal damping and gyroscopic moment

Phase difference and stability of a shaft mounted a dry friction damper: Effects of viscous internal damping and gyroscopic moment

Nonlinear vibration response of a helicopter supercritical tail rotor drive shaft equipped with a dry friction damper

Study on the Nonlinear Characteristics of a Rotating Flexible Blade with Dovetail Interface Feature

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