Dynamic bifurcations analysis of a micro rotating shaft considering non-classical theory and internal damping

Ghasabi, S. Ali; Shahgholi, Majid; Arbabtafti, Mohammadreza

doi:10.1007/s11012-018-0913-4

Cited by 10 publications

(1 citation statement)

References 28 publications

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“…Monajemi and Mohammadimehr 28 examined the effects of viscous and hysteretic damping on the vibrational behavior and stability of a spinning Timoshenko micro-shaft. Ghasabi et al 29 investigated the dynamic bifurcation of a viscoelastic micro rotating shaft, showing that the internal and external damping coefficients influence the critical speed, amplitude, and phase of a non-trivial solution, and radius of the limit cycle. Ben Arab et al 30 introduced an Euler–Bernoulli shaft finite element formulation including the hysteretic internal damping of composite material and transverse shear effects, then used it to evaluate the influence of various parameters, including instability thresholds.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%