Improving Performance of Cantilevered Momentum Wheel Assemblies by Soft Suspension Support

Zhou, Weiyong; Li, Dongxu

doi:10.1155/2013/803051

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…(2) regardless of the torsional vibration of the shaft, the angular velocity of the shaft is constant; (3) the axial length of the disc is neglected, and the imbalance of the disc is located on one side plane; and (4) the stiffness and damping of the integral squeeze film damper are isotropic [23][24][25][26].…”

Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

“…A simplified model of the unbalanced single-side cantilevered rotor system is shown in Figure 4. The following assumptions were made during the analysis: (1) there is an elastic massless shaft; (2) regardless of the torsional vibration of the shaft, the angular velocity of the shaft is constant; (3) the axial length of the disc is neglected, and the imbalance of the disc is located on one side plane; and (4) the stiffness and damping of the integral squeeze film damper are isotropic [23][24][25][26]. It is assumed that the lateral displacement the rotation angle of the geometric center of the cantilevered disk in the x, y directions are x D , T D , y D , and U D , respectively.…”

Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

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Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Zhang

Yang

et al. 2019

Applied Sciences

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Featured Application: The proposed integral squeeze film bearing damper can effectively decrease the vibration of an unbalanced single-side cantilevered rotor system such as a flue gas turbine and pump. Abstract: In this paper, vibration control of an unbalanced single-side cantilevered rotor system using a novel integral squeeze film bearing damper in terms of stability, energy distribution, and vibration control is analyzed. A finite element model of such a system with an integral squeeze film bearing damper (ISFBD) is developed. The stability, energy distribution, and vibration control of the unbalanced single-side cantilevered rotor system are calculated and analyzed based on the finite element model. The stiffness of the integral squeeze film bearing damper is designed using theoretical calculation and finite element model (FEM) simulation. The influence of installation position and quantity of integral squeeze film bearing dampers on the vibration control of the unbalanced cantilevered rotor system is discussed. An experimental platform is developed to validate the vibration control effect. The results show that the installation position and quantity of the integral squeeze film bearing dampers have different effects on the stability, energy distribution, and vibration control of the unbalanced cantilevered rotor system. When ISFBDs are installed at both bearing housings, the vibration control is best, and the vibration components of the time and frequency domains have good vibration control effects in four working conditions. External excitations are mainly caused by the impact load and pulsation excitation of the fluid. When the excitation frequencies are close to the natural frequencies of the system, the resonance occurs in the system, causing unpredictable losses.With the rapid development of the single-side cantilevered rotor system, the vibration problems have become increasingly prominent. These problems pose a huge threat to safety production and economic benefits. In actual civil and military equipment, rotor systems often vibrate due to unbalance, resulting in impeller fracture, seal failure, bearing damage, valve failure, pipeline leakage, and loose foundation [6]. These faults cause equipment damage or even major safety accidents, along with unpredictable personal injury to users. So, it is necessary to control the vibration of the unbalanced single-side cantilevered rotor.The vibration mechanism of the unbalanced single-side cantilevered rotor system has already been researched by many scholars. According to the obtained theory, the vibration control of the system is divided into four types: structural modification, vibration absorption, vibration isolation, and vibration damping. At the same time, the vibration control method is divided into two types: active and passive control. Active control refers to the use of the sensor to collect signals and feedback for the controller to drive the damper to reduce vibration. Passive control refers to vibration control that can be performed without add...

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Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

Section: Theoretical Structure Modeling Of Unbalanced Single-side Canmentioning

confidence: 99%

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Zhang

Yang

et al. 2019

Applied Sciences

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“…Born in Ford Motor Company, assembly line has greatly improved labor productivity and opened the prelude to modern mass production. However, frequent assembly line adjustment, such as changes of operating personnel, assembly equipment, and material flow, would decrease assembly precision and quality of final products, which further increases difficulty of noise and vibration control [1], faults diagnosis [2][3][4], bending, and vibration analysis of structural parts, also influences the overall performance of such as suspension systems [5], universal joint in steering handling mechanism [6], and rotated shafts [7].…”

Section: Introductionmentioning

confidence: 99%

Evolution Balancing of the Small-Sized Wheel Loader Assembly Line

Lai

Hou

2015

Shock and Vibration

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Assembly line balancing not only directly determines production efficiency but also influences precision and quality of key assemblies or even the overall performance of final products. Driven by market demand and development of science and technology, product family must evolve constantly, which necessitates frequent adjustment and rebalancing of product family assembly line (PFAL). In order to maintain production efficiency, improve assembly quality and precision, and reduce costs for adjustment, the evolution balancing problem of PFAL for small-sized wheel loader is solved in this paper. Firstly, the evolution balancing model of PFAL is put forward. Then, with minimizing the number of workstations, the in-station and between-station load indexes and adjustment costs, and maximizing relevancy between activities as optimization objectives, meanwhile regarding product platform planning, modularity design and the critical chain technology in concurrent engineering as constraint conditions, the evolution balancing problem of PFAL is optimized using improved genetic algorithm (IGA). Finally, the whole analysis procedure is demonstrated by the small-sized wheel loader PFAL case study and the effectiveness of the proposed method is verified.

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Modeling and validation of reaction wheel micro-vibrations considering imbalances and bearing disturbances

Alkomy

Shan

2021

Journal of Sound and Vibration

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Improving Performance of Cantilevered Momentum Wheel Assemblies by Soft Suspension Support

Cited by 3 publications

References 11 publications

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Vibration Control of an Unbalanced Single-Side Cantilevered Rotor System with a Novel Integral Squeeze Film Bearing Damper

Evolution Balancing of the Small-Sized Wheel Loader Assembly Line

Modeling and validation of reaction wheel micro-vibrations considering imbalances and bearing disturbances

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