Eliminating the Fluid‐Induced Vibration and Improving the Stability of the Rotor/Seal System Using the Inerter‐Based Dynamic Vibration Absorber

Xu, Qi; Luo, Yuanqing; Yao, Hongliang; Zhao, Ling; Wen, Bangchun

doi:10.1155/2019/1746563

Cited by 6 publications

(4 citation statements)

References 34 publications

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“…In recent years, there are an increasing number of scholars who pay attention to the nonlinear vibration of the seal-bearingrotor system because of its strong nonlinear characteristics, including oil-film instability and other coupling faults, such as the airflow-induced vibration [21][22][23][24][25][26][27][28][29][30][31][32]. For example, Wang et al [21] studied the effect of the real high-pressure methane gas properties on the nonlinear behavior of the seal-rotor system.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Lin

Zhao

Wang

et al. 2021

Shock and Vibration

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In this paper, a pedestal looseness fault model of a rotor-bearing-seal system is established. Under two working conditions of the same direction eccentricity (Working Condition 1) and reverse eccentricity (Working Condition 2), rotor orbits, vibration waveforms, spectrum cascade, and Poincaré maps are used to study the dynamic characteristics of the system when the sliding bearing support is loosened. The influence of speed, the unbalance of two discs, the looseness clearance, and the mass of bearing support on system characteristics are analyzed. The study found that Working Condition 2 is more likely to cause looseness of the bearing support. Moreover, for the rotor system in this paper, the pedestal looseness fault is more likely to occur near the second-order critical speed. Through analysis of the spectrum, it is found that the spectrum of the looseness fault will show multiple frequencies or continuous spectra, and the rotor orbits will appear “cylindrical.”

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Section: Introductionmentioning

confidence: 99%

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Lin

Zhao

Wang

et al. 2021

Shock and Vibration

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“…; the above responses are the response to the ground. Let X � ϕ 1 q, where ϕ 1 is the first mode and q is the generalized displacement; by substituting it into equation (29) and carrying out the Laplace transform of equation ( 29), the transfer function of seismic acceleration to the displacement of the main structure can be obtained:…”

Section: Analytic Solution Of H 2 Performance Optimization For Tmdmentioning

confidence: 99%

“…Inerter was first applied in the suspension system of Formula One racing cars [6] and was called "J-damper" at that time. Afterwards, inerter has been broadly studied in the mechanical engineering field, such as vehicles [11][12][13][14][15][16][17], wind turbines [18][19][20], civil engineering structures [21][22][23][24][25], and other vibration control systems [26][27][28][29][30]. Recently, inerter has also been applied to wave energy converters [31,32].…”

Section: Introductionmentioning

confidence: 99%

Seismic Isolation Performance Evaluation for a Class of Inerter-Based Low-Complexity Isolators

Cao

Chen

2020

Shock and Vibration

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In this paper, the seismic base isolation problem for all low-complexity networks containing one inerter, one spring, and one damper is studied based on a multi-degree-of-freedom model. The analytical solutions for the H2 performance optimization are derived, and the traditional tuned mass damper (TMD) is employed for comparison. Extensive numerical simulations are performed to verify the effectiveness of the obtained results. The results show that for different seismic wave excitations, some isolators are better than TMD in controlling the displacement of the main structure. Moreover, with the increase of the TMD mass ratio, the isolation performances of the inerter-based isolators are increasingly better than that of TMD.

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“…The Timoshenko beam element and Muszynska seal force model were employed by Zhang to simulate a rotor-bearing-labyrinth seal system [13]. Xu [14] conducted research into the stability of rotor/seal systems with dynamic vibration absorbers. The dynamic characteristics of annular seals under large eccentricities were investigated by the transient CFD simulation [15].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Analysis of Rotor-Bearing-Seal System with Varying Parameters Muszynska Model Based on CFD and RBF

Wang

Cao

et al. 2022

Machines

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The computational fluid dynamics (CFD) combined with radial basis function (RBF) method were adopted to obtain the response surface of the Muszynska nonlinear seal force model coefficient with two variables: eccentricity and rotation speed. During the implementation of the simulation, three coefficients of the seal force model were calculated in each sub-step according to the current state of the rotor-bearing seal system; following which the rotor dynamics analysis with varying parameters was realized. As with the traditional constant coefficient method, the first-order critical speed of the system was obtained, and the bifurcation point and oil film whirl of the system response were identified. The difference is that the coefficients of the traditional method ordinarily do not change with the state of the system. Comparing the results of the varying parameter method with those of the traditional method, it can be seen that the speeds of the system corresponding to the bifurcation and oil film whirl are different. The varying parameter rotor dynamics simulation method proposed in this paper provides a new way of analyzing the nonlinear characteristics of rotor-bearing-seal systems.

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Eliminating the Fluid‐Induced Vibration and Improving the Stability of the Rotor/Seal System Using the Inerter‐Based Dynamic Vibration Absorber

Cited by 6 publications

References 34 publications

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Nonlinear Responses of a Rotor‐Bearing‐Seal System with Pedestal Looseness

Seismic Isolation Performance Evaluation for a Class of Inerter-Based Low-Complexity Isolators

Nonlinear Analysis of Rotor-Bearing-Seal System with Varying Parameters Muszynska Model Based on CFD and RBF

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