Study on the lateral and torsional vibration of single rotor-system using an integrated multi-body dynamics and finite element analysis

Eisa, Abdelrahman I. A.; Li, Shusen; Helal, Wasim M.K.

doi:10.1177/1687814020968336

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…They compare the results obtained and highlight their effectiveness and reliability. Eisa et al (2020) [23] proposed a practical approach to analyze lateral and torsional vibrations by integrating multi-body dynamics with the FEM. Shen et al (2021) [24] took into account the rotational inertia effects by employing a total Lagrangian method using a 3-D Finite Element formulation compatible with commercial software.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Modeling for Mechanical Analysis of Hydropower Generators with Floating Rotor Rim

Rondon,

Pääjärvi,

Aidanpää

et al. 2024

Machines

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Hydropower generators withstand multiple forces from diverse sources during operation. To ensure their stability and safe performance, numerical tools are developed to characterize their dynamic properties. Traditionally, generators are assumed to be rigid in rotordynamic analyses. However, the measurements in power stations challenge this assumption. This article proposes a novel approach to modeling hydropower generators with floating rotor rims using a three-dimensional (3-D) Finite Element Method, aiming to study their dynamic performance and properties, including natural frequencies, the modes of vibrations, and expansion due to centrifugal and electromagnetic forces, with the goal of improving the reliability of modern designs. Both this approach and employing a two-dimensional (2-D) model using curved beams result in similar in-plane natural frequencies and the expansion of the rotor rim due to centrifugal forces. However, the 3-D model can be used to calculate the out-of-plane natural frequencies and modes, to model the dynamics of complex geometries, and to perform stress evaluation and fatigue analysis.

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Section: Introductionmentioning

confidence: 99%

Three-Dimensional Modeling for Mechanical Analysis of Hydropower Generators with Floating Rotor Rim

Rondon,

Pääjärvi,

Aidanpää

et al. 2024

Machines

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“…This dynamic interaction gives rise to challenging a rigid-flexible coupling. The predominant modeling approaches used to address this issue include the finite element method [14][15][16], the multi-body dynamic method [17][18][19], as well as the mixed method, among others [20][21][22]. For instance, Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [20] presented a novel analytical method that integrates multi-body dynamics and finite element analysis to simulate lateral and torsional vibrations in a single rotor system, with a focus on studying the effects of these vibrations on the bearings and the mass center due to increased operating speeds and eccentricity in the industry. To expedite the simulation process, the multi-body dynamic method is employed to construct dynamic models of spinning satellites with IPSs.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Disturbance Analysis of Spinning Satellites with Inflatable Protective Structures

Shang,

Deng,

Cai

et al. 2023

Aerospace

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The escalating proliferation of space debris poses an increasing risk to spinning satellites, elevating the probability of hazardous collisions that can result in severe damage or total loss of functionality. To address this concern, a pioneering inflatable protective structure is employed to ensure the optimal functionality of spinning satellites. Additionally, a multi-body dynamic modeling method based on spring hinge unfolding/spring expansion is proposed to tackle the complex dynamics of spinning satellites with inflatable protective structures during flight. This method enables analysis of the motion parameters of spinning satellites. First, the structural composition of a spinning satellite with inflatable protective structures is introduced and its flight process is analyzed. Then, an articulated spring hinge unfolding model or a spring expansion model using the Newton–Euler method is established to describe the unfolding or expansion of the spinning satellite with inflatable protective structures during flight. Finally, the effects on the motion parameters of a spinning satellite are analyzed through simulation under various working conditions.

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“…In [6], the paper calculated the natural torsional vibration mode of marine power transmission systems by two methods. In [9], the torsional vibration of the single rotor-system model was researched, and three markers were placed on the locations of the left and right shaft bearings. In [10], presenting the frequency and active power control method for the wind turbine and diesel engine systems.…”

Section: Introductionmentioning

confidence: 99%

Dynamics analysis of the nonlinear rotor system with Geislinger coupling

Wang¹,

Li²,

Li³

et al. 2023

Vib. proced.

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Rotor systems with coupling consist of two rotors, rolling bearings, sealing components, and nonlinear coupling. Currently, rotor systems with coupling are widely used in marine engines, aerospace engines, and various vehicle engines. In studies of rotor systems with coupling, the coupling connecting both sides of the rotor are often regarded as a linear stiffness unit. But in actual engineering, the torsional stiffness of the coupling varies with the speed of the system, and the variation of the coupling stiffness will affect the dynamic characteristics of the rotor. Based on the above phenomena, this study establishes the rotor model of driveshaft-Geislinger coupling-driveshaft in diesel engines and obtains the modal, frequency, and transient response analysis results of the rotor system with nonlinear Geislinger coupling. The modal, frequency, and transient response analysis results of the nonlinear model are compared with those of the linear model. This study can provide theoretical support for the vibration analysis of nonlinear rotor systems with connected Geislinger coupling.

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Study on the lateral and torsional vibration of single rotor-system using an integrated multi-body dynamics and finite element analysis

Cited by 6 publications

References 24 publications

Three-Dimensional Modeling for Mechanical Analysis of Hydropower Generators with Floating Rotor Rim

Three-Dimensional Modeling for Mechanical Analysis of Hydropower Generators with Floating Rotor Rim

Modeling and Disturbance Analysis of Spinning Satellites with Inflatable Protective Structures

Dynamics analysis of the nonlinear rotor system with Geislinger coupling

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