Investigation on nonlinear lateral-torsional coupled vibration of a rotor system with substantial unbalance

Hong, Jun; Yu, Pingchao; Ma, Yuanyuan; Zhang, Dayi

doi:10.1016/j.cja.2020.02.023

Cited by 27 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, the amplitude of torsional vibration in most rotor systems is little, permitting sin and cos to be approximated based on the first term of their respective Taylor series expansions. Assuming this, the relations below are utilized (Hong et al 2020):…”

Section: Methodology and Numerical Modelmentioning

confidence: 99%

“…The vertical and horizontal vibrations are observed to be unconnected to the torsional vibration, with the case of e = 0. To continue the coupled vibration calculations, the cross-section eccentricity is taken as 0.001 (Hua et al 2017; Huang et al 2017;Hong et al 2020). The parameters used in the simulation are summarized in Table 1.…”

Section: Methodology and Numerical Modelmentioning

confidence: 99%

“…He et al (2020) derived the governing equations and the boundary conditions of wings through Hamilton's principle to achieve a rigid-flexible wing under bending and twisting deflection. In addition, Han et al (2017) and Hong et al (2020) studied a rotor system with a dynamic model in which the rotor disk is placed in the middle of a massless elastic shaft. The equation of motion was obtained through Lagrangian dynamics for lateral-torsional vibrations.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

Halilbeşe

Zhang

Özsoysal

2021

J. Marine. Sci. Appl.

View full text Add to dashboard Cite

In this study, the coupled torsional–transverse vibration of a propeller shaft system owing to the misalignment caused by the shaft rotation was investigated. The proposed numerical model is based on the modified version of the Jeffcott rotor model. The equation of motion describing the harmonic vibrations of the system was obtained using the Euler–Lagrange equations for the associated energy functional. Experiments considering different rotation speeds and axial loads acting on the propulsion shaft system were performed to verify the numerical model. The effects of system parameters such as shaft length and diameter, stiffness and damping coefficients, and cross-section eccentricity were also studied. The cross-section eccentricity increased the displacement response, yet coupled vibrations were not initially observed. With the increase in the eccentricity, the interaction between two vibration modes became apparent, and the agreement between numerical predictions and experimental measurements improved. Given the results, the modified version of the Jeffcott rotor model can represent the coupled torsional–transverse vibration of propulsion shaft systems.

show abstract

Section: Methodology and Numerical Modelmentioning

confidence: 99%

Section: Methodology and Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

Halilbeşe

Zhang

Özsoysal

2021

J. Marine. Sci. Appl.

View full text Add to dashboard Cite

show abstract

“…As the main heart of aero-rotor engines, aero-rotor blades are listed as the first key part due to their harsh environment of high temperature and complex stress for a long time. The performance level of aero-rotor blades, especially temperature-bearing capacity and mechanical strength, has become an important symbol of the engine advanced degree 1 . With the development of aero-rotor engines in recent years towards the direction of high thrust-weight ratio structures and new lightweight super-alloy materials 2 , a higher requirement for surface machining technology of aero-rotor blades has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Research on the multi-physics field coupling simulation of aero-rotor blade electrochemical machining

Huang

Cao

Zhang

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Aimed at the problem that the quality of the formation of aero-rotor blades with complex shaped structures is difficult to predict due to the coupling of each physical field in the process of electrochemical machining, a mathematical model of electrochemical machining characterized by the conductivity of the multi-physics field is established firstly by studying the coupling action mechanism of the flow field and temperature field on electric field conductivity in the machining process. Then, utilizing the Runge–Kutta method, the relationship between the conductivity and the machine path is analysed; Finally, based on this relationship, the multi-physics field electrochemical machining erosion model is compared with the traditional single electric field electrochemical machining erosion model. The results show that the error of the multi-physical field coupling prediction model proposed in this study is in the range of 1.27–2.35%, while the accuracy of the single electric field prediction model is in the range of 4.35–5.88%. The theoretical value of the multi-physics field coupling simulation is closer to the measured value of the test and can accurately simulate the actual electrochemical machining process, which can provide a theoretical basis for the design of cathode tools and parameter optimization in the actual processing process and is of great significance to improve the quality and efficiency of the electrochemical machining of aero-rotor blades.

show abstract

“…Cao et al [37] established a bearing-rotor model that considers the nonlinear forces of the bearings and SFDs and examined the nonlinear transient response of the combined lateral and torsional vibrations. Hong et al [38] derived the differential equations for a rotor system considering the coupling effect of lateral and torsional vibrations due to rotor unbalance and analyzed the modal characteristics of the rotor using Floquet theory and Hill method.…”

Section: Introductionmentioning

confidence: 99%

Coupled Lateral and Torsional Vibration of Rub‐Impact Rotor during Hovering Flight

Zheng

Chen

Luo

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

When aircraft make a maneuvering during flight, additional loads acting on the engine rotor system are generated, which may induce rub-impact faults between the rotor and stator. To study the rub-impact response characteristics of the rotor system during hovering flight, the dynamic model of a rub-impact rotor system is established with lateral-torsional vibration coupling effect under arbitrary maneuvering flight conditions using the finite element method and Lagrange equation. An implicit numerical integral method combining the Newmark-β and Newton–Raphson methods is used to solve the vibration response. The results indicate that the dynamic characteristics of the rotor system will change during maneuvering flight, and the subharmonic vibrations are amplified in both lateral and torsional vibrations due to maneuvering overload. The form of the rub-impact is different during level and hovering flight conditions: the rub-impact may occur at an arbitrary phase of the whole cycle under the condition of level flight, while only local rub-impact occurs during hovering flight. Under the both flight conditions, the rub-impact has a large effect on the spectral characteristics, periodicity, and stability of the rotor system.

show abstract

Investigation on nonlinear lateral-torsional coupled vibration of a rotor system with substantial unbalance

Cited by 27 publications

References 29 publications

Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

Research on the multi-physics field coupling simulation of aero-rotor blade electrochemical machining

Coupled Lateral and Torsional Vibration of Rub‐Impact Rotor during Hovering Flight

Contact Info

Product

Resources

About