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Journal articles on the topic 'ECCENTRICITY SIMULATION'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Oyang, Bryance, Yan-Fei Jiang (姜燕飞), and Omer Blaes. "Investigating lack of accretion disc eccentricity growth in a global 3D MHD simulation of a superhump system." Monthly Notices of the Royal Astronomical Society 505, no. 1 (2021): 1–17. http://dx.doi.org/10.1093/mnras/stab1212.

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ABSTRACT We present the results of a 3D global magnetohydrodynamic (MHD) simulation of an AM CVn system that was aimed at exploring eccentricity growth in the accretion disc self-consistently from a first principles treatment of the MHD turbulence. No significant eccentricity growth occurs in the simulation. In order to investigate the reasons why, we ran 2D alpha disc simulations with alpha values of 0.01, 0.1, and 0.2, and found that only the latter two exhibit significant eccentricity growth. We present an equation expressing global eccentricity evolution in terms of contributing forces and

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2

Gao, Qi Ming, Guo Qing Zhao, and Hai Fei Wang. "Simulation and Analysis of Roller Eccentricity Compensation in Cold Mill." Advanced Materials Research 143-144 (October 2010): 148–51. http://dx.doi.org/10.4028/www.scientific.net/amr.143-144.148.

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With the increase request of strip quality, the roller eccentricity has become the important factor of influencing product quality. On the practical model of Cold-rolling Mill of 300, this paper establishes eccentricity compensation control practice of Cold-rolling Mill of 300 which applies wavelet transform method. Based on mufti-resolution decomposition of roll force signal by use of wavelets, eccentricity signals are separated from disturbances and noise，and self-optimization is employed to real-time control the roller eccentricity. The results show that the method is effective.

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3

Zhang, Zhuangzhuang, and Fuhao Liu. "Analysis and Simulation of Spur Gear System Considering Geometric Eccentricity." Academic Journal of Science and Technology 12, no. 3 (2024): 194–98. http://dx.doi.org/10.54097/smpqyw12.

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Geometric eccentricity errors inevitably occur in gear systems, resulting in the center of mass and center of rotation not coinciding. During the gear meshing process, the gear center distance and gear tooth meshing condition will change with time. In this paper, a model considering geometric eccentricity is proposed and a finite element model of the gear pair is developed. Finally, the dynamic response under different eccentricity and initial eccentricity angle is discussed. Based on Ansys, the simulation calculation of the gear pair is carried out, and the equivalent force maps of the danger

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4

Pérez, Ramón, Jérôme Cros, and Mathieu Picard. "Real-Time Modeling of Static, Dynamic and Mixed Eccentricity in Permanent Magnet Synchronous Machines." Machines 13, no. 2 (2025): 120. https://doi.org/10.3390/machines13020120.

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Eccentricity faults are one of the main causes that significantly affect the performance of permanent magnet synchronous machines (PMSMs). Monitoring eccentricity in real time could prevent failures by adapting operation conditions and maintenance schedule when early signs of deterioration are detected. This article proposes making a circuit-type model of a permanent magnet machine with an easily configurable eccentricity for simulations and real-time analysis of signals under different operating conditions. The basis for the construction of the circuit model will be the simulation of the PMSM

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Wu, Nan Xing, Tian Tian Zhan, and Da Hai Liao. "The Effect of Dry Granulating Machine Spindle Eccentricity on the Granulation." Advanced Materials Research 1094 (March 2015): 374–78. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.374.

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For the dispersity of particles in the process of ceramics dry granulating, simulating the effect of spindle eccentricity on it based on the Euler-Euler model. Simulation results show that the volume fraction of particles in the granulating chamber were 52%, 53%, 51% when the spindle eccentricity were 15mm, 25mm, 35mm. For particles distribute in the region of packing density above 0.4kg/m3 , the volume fraction in the granulating chamber were 11%, 3%, 7%. Therefore, spindle eccentricity has little effect on the whole the volume fraction of particles, but the effect on particles distribute in

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6

Li, Dong, Wei Xing Song, Cai Jin Zhang, et al. "Application of Dynamic Deadband Eccentricity Filter in GM-AGC System." Materials Science Forum 789 (April 2014): 587–92. http://dx.doi.org/10.4028/www.scientific.net/msf.789.587.

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The problem of roll eccentricity has become one of important factors to affect the quality of strips as downstream industries require improvement of the strip quality. Reducing thickness control precision as little as possible is incompatible with restraining roll eccentricity perturbations on the requirement of the deadband size for the deadband drift method (DDM) with fixed deadband width. Therefore, the GM-AGC system in hot finishing mill of an aluminum plant uses the dynamic deadband eccentricity filter (DDEF) whose deadband width varies with the amplitude of the roll eccentricity signal.

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7

Wang, Li Jun, Xiao Kang Yan, Fei Hu Li, and Zi Xin Dong. "Numerical Simulation of Magnetic Fluid Lubrication." Advanced Materials Research 154-155 (October 2010): 1498–501. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.1498.

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This paper was concerned with theoretical analysis and the static characteristics of the journal bearing lubricated with magnetic fluid. A general Reynolds equation based on magnetic fluid model is obtained, which can be easily extended to other non-Newtonian fluids and this equation can provide theoretical basis for hydrodynamic analysis of magnetic fluid journal bearings. For the case of static loaded magnetic journal bearings, the influence of magnetic fluid effects on the lubrication performance is studied under various eccentricity ratios, magnetic intensity and concentration. The numeric

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8

Yang, Zhe, Ding Liu, and Gang Zheng. "Roll Eccentricity Signal Detection and Its Engineering Application Based on SFFT-IAA." Applied Sciences 12, no. 17 (2022): 8913. http://dx.doi.org/10.3390/app12178913.

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The roll eccentricity signal is a weak and complex periodic signal that is difficult to be identified. To improve the detection accuracy of the roll eccentricity signal and to compensate effectively, this study proposed a roll eccentricity signal detection method by combining the sparse fast Fourier transform (SFFT) and the iterative adaptive approach (IAA). The proposed method can rapidly determine the frequency range of the roll eccentricity signal by using the SFFT. Then, it divides the frequency range into several small frequency bands. In each small frequency band, the frequency, amplitud

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9

Zhang, Yuanjun, Dong Wu, Maojie Liao, et al. "Impact of Tool Eccentricity on Acoustic Logging Response in Horizontal Wells: Insights from Physical Simulation Experiments." Geofluids 2024 (January 5, 2024): 1–11. http://dx.doi.org/10.1155/2024/8071443.

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Horizontal wells are extensively utilized in the development of unconventional reservoirs. However, the logging responses and formation evaluation in horizontal wells can be impacted by factors like anisotropy and tool eccentricity. To investigate the influence of tool eccentricity on acoustic logging response, physical simulation experiments of array acoustic logging were conducted in a scaled borehole formation model under different tool eccentricity conditions. The experimental data were analyzed, and the findings revealed that when the receiver array is parallel to the borehole axis, the P

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10

Ďurčík, Roman, Ladislav Morovič, Michal Kán, and Milan Mojžiš. "NUMERICAL SIMULATION OF ECCENTRICITY CREATION IN THE PRODUCTION OF HOT ROLLED TUBES." Acta Tecnología 7, no. 4 (2021): 125–29. http://dx.doi.org/10.22306/atec.v7i4.122.

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The paper deals with the issue of eccentricity in the technological node of the piercing press, under selected conditions, which result from the possibilities of production in the conditions of ŽP a.s. These conditions were verified and adapted to the rolling process. This process consisting of individual technological nodes on the rolling mill, in which eccentricity is created on the piercing press and the following steps eliminate it in other technological nodes. For quality analysis of manufacturing tubes using numerical simulation, it is necessary to know the actual state of eccentricity c

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11

Liu, Yutian, Yechen Liu, Zelin Liu, and Xiaoya Ding. "Exploring the effect of eccentricity on geometry nuclear collisions by Glauber Monte Carlo simulation." Theoretical and Natural Science 43, no. 1 (2024): 21–25. http://dx.doi.org/10.54254/2753-8818/43/20240954.

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This paper will analyze different properties of a nuclear collision and their correlation with the geometry of collision using the Glauber Monte-Carlo based calculations. Among all properties, the eccentricity is the main focus of this research. In order to investigate its impact on collision parameters, three-dimensional histograms are created, using given collision parameters, under different categories of numbers of participant nucleons. Comparisons between the histograms allow the exploration of connections between this property and the geometries of lead nuclear collisions, namely, the el

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12

Lv, Kaikai, Kaiyun Wang, Zhihui Chen, Chengbiao Cai, and Lirong Guo. "Influence of Wheel Eccentricity on Vertical Vibration of Suspended Monorail Vehicle: Experiment and Simulation." Shock and Vibration 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/1367683.

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This paper investigates the influence of wheel eccentricity on vertical vibration of suspended monorail vehicle based on experiment and simulation. Two sets of tests are conducted in the first Chinese suspended monorail, and the tested acceleration is analyzed and exhibited. A multibody dynamic model of the suspended monorail vehicle is established to simulate the vertical vibration of car body excited by wheel eccentricity. The results show that there are three factors which may cause an abnormal vibration considering the track and the vehicle system. The influence of wheel eccentricity on th

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13

Dong, Jiaqi, and A. Bazhanov. "Simulation Analysis of Non-concentric Squeeze Film Damper." Bulletin of Science and Practice 10, no. 7 (2024): 343–54. http://dx.doi.org/10.33619/2414-2948/104/36.

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Squeeze film dampers are components that provide additional damping for rotating motors. In general, in order to achieve the best results of the squeeze film damper, it is necessary to appropriately increase the damping value, reduce the stiffness and set a reasonable eccentricity. In the process of designing the squeeze film damper, we can apply the rotor dynamics module of COMSOL software to model and simulate it, so as to achieve better simulation results and lay a foundation for the subsequent development and design of the product. In COMSOL software, in order to simplify the modeling of r

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14

Huang, Shunquan, Rebecca G. Martin, and Stephen H. Lubow. "Excitation of Post-asymptotic Giant Branch Star Binary Eccentricity by Massive Polar-aligned Circumbinary Disks." Astrophysical Journal 985, no. 1 (2025): 65. https://doi.org/10.3847/1538-4357/adcf1f.

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Abstract Many post-asymptotic giant branch star binaries are observed to have relatively high orbital eccentricities (up to 0.6). Recently, AC Her was observed to have a polar-aligned circumbinary disk. We perform hydrodynamic simulations to explore the impact of a polar-aligned disk on the eccentricity of a binary. For a binary system with central masses of 0.73 and 1.4 M ⊙, we find that a disk with a total mass of 0.1 M ⊙ can enhance the binary eccentricity from 0.2 to 0.7 within 5000 yr, or from 0.01 to 0.65 within 15,000 yr. Even if the disk mass is as low as 0.01 M ⊙, the binary eccentric

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15

Elplacy, F., M. Samuel, and R. Mostafa. "Modelling and simulation of hot direct extrusion process for optimal product characteristics: Single and multi-response optimization approach." Advances in Production Engineering & Management 17, no. 1 (2022): 33–44. http://dx.doi.org/10.14743/apem2022.1.419.

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The study of eccentricity minimization in cylindrical products helps to reduce the mechanical vibrations and wear of related mechanical parts such as bearings, columns and gears which positively affects in maintenance costs savings and increasing production quality reliability. The main purpose of this paper is to investigate the effect of the eccentricity between the billet material and the die parts on the quality of the final product in the direct extrusion process. The input parameters to produce a cylindrical product shape are optimized in MINITAB based on Taguchi method and ANOVA. The se

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16

Xu, Haotian, Junzhe Shi, and Ziyan Song. "Optimization of asymmetry of Pb-Pb nucleus collision based on Glauber model simulation." Theoretical and Natural Science 28, no. 1 (2023): 206–17. http://dx.doi.org/10.54254/2753-8818/28/20230428.

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Currently, researchers wanted to optimize the radiation by selecting certain asymmetry to produce high-energy particles in QGP collision. Our research utilized the Glauber-Monto-Carlo Model to simulate the collision and tried to find the domain of different independent variables to maximize the asymmetry of the cross-section. We have conducted relevant analysis and research on the principles of this model and generated relevant images using ROOT. The result shows that at the number level of 106, for the number of bins equals 10, we have (0.4, 0.5) for eccentricity in the second harmonic, (0.9,

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17

Li, Z. H., Y. L. Chen, S. Li, and D. S. Bi. "Predict Stiffness of Hydraulic Press with Movable Eccentricity Loading Considering Uncertainty by Monte Carlo Simulation." Materials Science Forum 697-698 (September 2011): 721–25. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.721.

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The stiffness analysis method considering uncertainty parameters of frame hydraulic press with movable eccentricity loading in the early design stage was proposed. The mathematical analytical stiffness of the upper beam with movable eccentricity loading was built. The adaptive Monte Carlo Method was used to calculate the interval of the stiffness with random parameters. The result shows that the stiffness appears higher when the eccentricity increasing. The approach has been tested by measuring the stiffness of a 10000kN frame hydraulic press and a 15000kN frame hydraulic press.

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18

Yuan, Ju Long, W. T. Liu, Zhi Wei Wang, Dong Hui Wen, and Zhao Zhong Zhou. "Research and Simulation on the Wear Uniformity of Lapping Plate." Key Engineering Materials 364-366 (December 2007): 466–69. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.466.

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Lapping plate wear is of great influence on shape precision of workpiece. Investigation on the wear uniformity of uncertain eccentricity plane lapping was carried out in this research. The relative velocity function of the plate to the workpiece is obtained through kinematic analyses in the mode of uncertain eccentricity plane lapping, and material removal rate (MRR) function and wear uniformity function were deduced based on Preston equation. Effects of the ratio and eccentricities on the wear uniformity are discussed in detail through MATLAB simulation. Theoretical analysis and simulation re

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19

Zeng, Yun, Li Xiang Zhang, Jing Qian, and Cheng Li Zhang. "Shafting Vibration Simulation for Hydro Turbine Generating Sets." Applied Mechanics and Materials 444-445 (October 2013): 1171–76. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.1171.

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Based on the transient model of hydro turbine generating sets (HTGS), the integrated simulation system of HGTS is built to study shafting stability. Given different bearing stiffness, equivalent damping coefficient and mass eccentricity, the change characteristics of shafting vibration at rated angular speed in steady and maximum angular speed in transient are simulated, and which are applied to study inferences shafting parameters and angular speed on shafting vibration. Simulation results show that the relationship between shafting vibration amplitude and angular speed is linear. however, th

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20

Shimizu, Sota, and Joel W. Burdick. "Eccentricity Compensator for Wide-Angle Fovea Vision Sensor." Journal of Robotics and Mechatronics 21, no. 1 (2009): 121–27. http://dx.doi.org/10.20965/jrm.2009.p0121.

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This paper aims at the acquisition of a robust feature for rotation, scale, and translation-invariant image matching of space-variant images from a fovea sensor. The proposed model eccentricity compensator corrects deformation in log-polar images when the fovea sensor is not centered on the target image, that is, when eccentricity exists. An image simulator in a discrete space implements this model through its geometrical formulation. This paper also proposes Unreliable Feature Omission (UFO) using the Discrete Wavelet Transform. UFO reduces local high frequency noise appearing in the space-va

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21

Shevchenko, Aleksandr Fedorovich, and Dmitriy M. Toporkov. "Additional Torque in Multipole Permanent Magnet Machines Caused by Eccentricity." Applied Mechanics and Materials 792 (September 2015): 78–82. http://dx.doi.org/10.4028/www.scientific.net/amm.792.78.

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The additional torque caused by the static eccentricity in multipole permanent magnet machines is investigated in the paper. The equation governing the dependence of the additional torque on number of poles and the amount of eccentricity qualitatively is developed. Analytical conclusions are verified by the results of numerical simulation.

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22

Zhang, Jie, Zheng Liang, and Chuanjun Han. "Numerical Simulation of Pipeline Deformation Caused by Rockfall Impact." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/161898.

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Rockfall impact is one of the fatal hazards in pipeline transportation of oil and gas. The deformation of oil and gas pipeline caused by rockfall impact was investigated using the finite element method in this paper. Pipeline deformations under radial impact, longitudinal inclined impact, transverse inclined impact, and lateral eccentric impact of spherical and cube rockfalls were discussed, respectively. The effects of impact angle and eccentricity on the plastic strain of pipeline were analyzed. The results show that the crater depth on pipeline caused by spherical rockfall impact is deeper

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23

Ma, Tianji, Zhaoxue Deng, Wanli Liu, and Mengmeng Hou. "A Numerical Method to Determine the Radial Electromagnetic Force of the Switched Reluctance Motor Under Air Gap Eccentricity." Machines 12, no. 11 (2024): 823. http://dx.doi.org/10.3390/machines12110823.

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This paper discusses a numerical model for determining the radial electromagnetic force of switched reluctance motors under air gap eccentricity (vertical and tilt eccentricities). The authors compare experimental and simulation results to demonstrate that the proposed model can accurately simulate the behavior of radial forces in switched reluctance motors under various types of air gap eccentricity. Moreover, the paper attempts to establish a dynamic model of the SRM and nalyze the performance of the radial electromagnetic force under air gap eccentricity in typical scenarios.

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Shin, Tae-Myung, and Byung-Chan Lee. "Seismic Response Effect on Base-Isolated Rigid Structures by Mass Eccentricity in Nuclear Plants." Applied Sciences 13, no. 24 (2023): 13330. http://dx.doi.org/10.3390/app132413330.

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The purpose of this paper is to analyze the seismic response effect caused by the mass eccentricity of individual equipment when conducting base isolation for the improvement of the seismic performance of a nuclear power plant. Recent research has interpreted and confirmed through analysis and testing that base isolation for safety-related equipment in nuclear power plants is an efficient alternative to designing for excessive seismic loads. Depending on the equipment, unavoidable mass eccentricity can occur, which necessitates verification of the response impact caused by eccentricity. In thi

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Zhou, Qing Xiao, Chao Yang Wang, Zhi Bing Fu, and Yong Jian Tang. "Numerical Simulation of Film Thickness Uniformity Deposited by Planar Circular Magnetron Sputtering System." Advanced Materials Research 887-888 (February 2014): 743–48. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.743.

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There exist angular offset and eccentricity between target and substrate in most practical multi-target magnetron sputtering systems, which should be seriously considered when we calculate the film distribution. This simulation results suggested that excellent thickness uniformity can be obtained when increased the substrate-target distance, angular offset, and eccentricity, but decreased the film thickness simultaneously. However, superior uniformity films without reducing the thickness remarkably can also obtained when the geometry configuration are proper configured.

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Deng, Qian Fa, Ju Long Yuan, Dong Hui Wen, Feng Chen, and Li Tao. "Simulation and Analysis for Application of Truing Ring in Certain Eccentricity Plane Lapping System." Key Engineering Materials 407-408 (February 2009): 482–85. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.482.

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In plane lapping, workpiece material removal and lapping wheel wear has been influenced each other and should be evenly distributed. Only required a flat lapping wheel, it could be obtained with flat workpieces and small thickness deviations. Therefore, the choice of the truing operation has an important effect on the quality of the lapping wheel and on the flatness of product. This is a way that using truing ring to true lapping wheel in certain eccentricity plane lapping system to acquire the flatness. The kinematics of certain eccentricity plane lapping for uniformity of processing is analy

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Zhang, Hui Wu, Peng Wang, and Hai Bo Chen. "Effect of Bolt Slippage and Joint Eccentricity on the Response of Lattice Structure with Non-Uniform Settlement." Applied Mechanics and Materials 483 (December 2013): 289–96. http://dx.doi.org/10.4028/www.scientific.net/amm.483.289.

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Lattice transimission towers are commonly made of angles bolted together directly or through gussets. And angle members are usually subjected to high axial force with eccentricity. Conventional structural analysis softwares solve such problems with the assumption of regarding the bolted connection as a rigid joint connection and ignored the effect of joint eccentricity. Thus the calculated internal forces of the structure members are bigger than those of real measurements, and the calculated structure deformation are smaller than the experimental ones under the same load. The main reasons for

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Wang, Hao, Jundi Wang, Zongsheng Zhang, and Changchao Li. "Eccentricity Analysis of the Co-Excitation Axial Reluctance Resolver during Manufacture and Installation." Processes 12, no. 2 (2024): 308. http://dx.doi.org/10.3390/pr12020308.

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In this paper, a type of co-excitation axial reluctance resolver (CARR) in different winding modes is taken as the simulation model. Detailed explanations have been provided on its stator, rotor, and windings. Simultaneously, an introduction was made to the distribution of two types of signal winding modes. The influence of three kinds of eccentricity on the output characteristics of this CARR during installation and fabrication is also studied. According to two kinds of signal winding modes, the variation law of waveform and amplitude of output potential is analyzed under the conditions of st

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Hu, Yongzheng, Jun Chen, Xiaodong Shen, and Jiantao Dang. "Nozzle Thrust Eccentricity Calculation Based on FLUENT Software." Journal of Physics: Conference Series 2489, no. 1 (2023): 012031. http://dx.doi.org/10.1088/1742-6596/2489/1/012031.

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Abstract Thrust eccentricity refers to the phenomenon that the thrust vector deviates from the axis of symmetry. This phenomenon will produce lateral force and torque around the aircraft, which affects the normal flight of the aircraft, increases the required control torque, and reduces the density of uncontrolled rockets. There are three sources of thrust eccentricity: mass eccentricity, geometric eccentricity, and aerodynamic eccentricity. The aerodynamic eccentricity is caused by the asymmetrical flow of combustion gas in the nozzle. This paper uses FLUENT software to carry out a numerical

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Xiao, Huan. "Dynamic Evaluation and Assessment of Horizontal Wellbore." International Journal of Natural Resources and Environmental Studies 5, no. 3 (2025): 6–14. https://doi.org/10.62051/ijnres.v5n3.02.

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This paper addresses the issue of wellbore cleaning during horizontal well drilling. A dynamic evaluation and assessment system for wellbore cleaning in horizontal wells has been developed using numerical simulation and the Analytic Hierarchy Process (AHP). First, numerical simulations were conducted using Fluent software to analyze the factors influencing the movement of rock cuttings in horizontal wells, such as drill string rotational speed, annular return velocity, drilling fluid properties, drill string eccentricity, and wellbore inclination angle. The effects of these factors on the cutt

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Návrat, Tomáš, David Halabuk, Miloš Vlk, and Petr Vosynek. "Eccentricity Effect in the Hole-Drilling Residual Stress Measurement." Defect and Diffusion Forum 382 (January 2018): 208–12. http://dx.doi.org/10.4028/www.scientific.net/ddf.382.208.

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The paper focuses on the analysis of the eccentricity effect in the measurement of the hole-drilling residual stress. Relaxed strains were evaluated by computational simulation of the hole-drilling experiment using the finite element method. Errors induced by eccentricity were estimated for elastic and elastic-plastic states in area around the drilled hole due to the stress concentration. The invariance of the stress change with depth was assumed. The correction of eccentricity and plasticity effects in evaluation of residual stresses was realized within the EVAL 7 software (SINT Technology).

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Karami, Mahdi, Norman Mariun, Kadir Ab, Radzi Mohd, and Norhisam Misron. "Analysis of rotor asymmetry fault in three-phase line start permanent magnet synchronous motor." Facta universitatis - series: Electronics and Energetics 34, no. 4 (2021): 483–98. http://dx.doi.org/10.2298/fuee2104483k.

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This article proposed a detection scheme for three-phase Line start permanent magnet synchronous motor (LSPMSM) under different levels of static eccentricity fault. Finite element method is used to simulate the healthy and faulty LSPMSM with different percentages of static eccentricity. An accurate laboratory test experiment is performed to evaluate the proposed index. Effects of loading condition on LSPMSM are also investigated. The fault related signatures in the stator current are identified and an effective index for LSPMSM is proposed. The simulation and experimental results indicate that

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Koppelman, Helmer H., Roy O. Y. Bos, and Amina Helmi. "The messy merger of a large satellite and a Milky Way-like galaxy." Astronomy & Astrophysics 642 (October 2020): L18. http://dx.doi.org/10.1051/0004-6361/202038652.

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Aims. About 10 billion years ago the Milky Way merged with a massive satellite, Gaia-Enceladus. To gain insight into the properties of its debris we analyse in detail a suite of simulations that includes an experiment that produces a good match to the kinematics of nearby halo stars inferred from Gaia data. Methods. We compare the kinematic distributions of stellar particles in the simulations and study the distribution of debris in orbital angular momentum, eccentricity, and energy, and its relation to the mass loss history of the simulated satellite. Results. We confirm that Gaia-Enceladus p

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Li, Peiai, Baoyu Wang, and Jiapeng Wang. "Numerical Simulation and Experimental Study on Rotary Cold Extrusion Forming of Screw Rod." Journal of Physics: Conference Series 2101, no. 1 (2021): 012017. http://dx.doi.org/10.1088/1742-6596/2101/1/012017.

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Abstract The rotary cold extrusion forming process is a plastic forming process with very low material loss, especially in the production of hollow screw rods with equal wall thickness. In this work, the rotary cold extrusion forming process of a hollow T2 copper screw rod with a wall thickness of 4 mm and solid T2 copper screw rod was verified by experimental method. The finite element simulation software Deform-3D was also used to simulate the rotary cold extrusion forming process of the screw rod. The effects of the die with different heights of the working belt and the different wall thick

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Fancheng, Wanli, Hengtai Ni, and Jing Liu. "The effect of the impeller eccentricity on the hydrodynamic characteristics of a centrifugal pump." Journal of Physics: Conference Series 2707, no. 1 (2024): 012015. http://dx.doi.org/10.1088/1742-6596/2707/1/012015.

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Abstract To explore the effect of impeller eccentricity caused by shaft parallel misalignment on the hydrodynamic characteristics of a centrifugal pump, a numerical simulation model based on computational fluid dynamics (CFD) is established. The SST k-ω turbulence model is used to describe the flow field in centrifugal pump. The eccentric motion of the impeller is described by the sliding mesh method (SMM). The results indicates that the nonuniformity and instability of flow field will be aggravated with the increment of impeller eccentricity, which then reduce the pump head and efficiency to

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Ye, Qing Ying, Shui Yuan Chen, Zhi Ming Lin, et al. "Study of Magnetic Properties for Fe Nanoring with Different Degree of Eccentricity." Materials Science Forum 817 (April 2015): 784–90. http://dx.doi.org/10.4028/www.scientific.net/msf.817.784.

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In this paper, Fe nanoring model of different degree of eccentricity has been made. Based on the FFTM method and MC simulation method, the magnetic properties of the Fe nanoring, such as hysteresis loops, spin configuration, have been studied. The simulated results indicate that there are typical hysteresis loops and spin-configurations, such as onion-type state and vortex-type state in the system of symmetric Fe nanoring. The hysteresis loops of the eccentric Fe nanoring are similar to symmetric system when the degree of eccentricity is small, but as the degree of eccentricity increased, the

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Zhang, Feng Ling, Rui Han, Yin Peng, and Lei Wang. "Vision Based Eccentricity Measurement of Auto-Hub and its Simulation." Advanced Materials Research 503-504 (April 2012): 1420–23. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1420.

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A machine vision based measurement system of auto-hub’s eccentricity between the center circle and the pitch circle of bolt holes is proposed in this article. Pictures of all bolt holes are shot when the auto-hub is rotating. The eccentricity can be calculated by tiling these pictures to a global image. There are some error factors in the system such as run-out of rotation center, inclined platform, rotation angle error, tilted auto-hub’s surface, roundness of the center hole and angle between bolt holes uneven. Mathematical models of these error factors are studied. By stimulating all these e

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Yuan, Yong Wen, Yan Jun Cheng, Jin Xin Zhu, and Liu Yi Li. "Three-Dimensional Simulation of the Influences of Operational Parameters on Stability of Formation-Cement Sheath-Casing Combination." Materials Science Forum 980 (March 2020): 525–46. http://dx.doi.org/10.4028/www.scientific.net/msf.980.525.

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At present, most of the studies of the stability of the formation-cement sheath-casing combination have been mainly based on the plane, and the three-dimensional model established is only one example. There is no systematic study of the influence of physical parameters and process parameters on the stability of the combined body under the three-dimensional model and the action of triaxial crustal stress. Through the establishment of three-dimensional formation-cement sheath-casing linear elastic combination model, we can study the influence of operational parameters (cement sheath pressure, ca

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Han, Jian Yong, and Guo Jing Chen. "Numerical Simulation Analysis of Centrifugal Pump Floating Ring Seal." Advanced Materials Research 317-319 (August 2011): 2148–51. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.2148.

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According to the studying on the force analysis of floating ring of centrifugal pump, the paper think that floating ring stress will change with the change of centrifugal pump’ s condition. Using fluent software, the floating ring seal was simulated and analyzed. Results show that the liquid force acted on the floating ring is nonuniform and asymmetrical as wedging effect, and that section maximum pressure is not lies in the smallest clearance place, but in the wedge area where liquid flows to the minimum clearance, because the effect of Leak resistance is better in high pressure than low pres

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Tian, Kun, Tao Zhang, Yibo Ai, and Weidong Zhang. "Induction Motors Dynamic Eccentricity Fault Diagnosis Based on the Combined Use of WPD and EMD-Simulation Study." Applied Sciences 8, no. 10 (2018): 1709. http://dx.doi.org/10.3390/app8101709.

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The frequency-domain analysis using the fast Fourier transform (FFT) for diagnosis of eccentricity fault has been widely used in squirrel-cage induction motor (IM). However, with the restriction of sampling frequency and time acquisition, FFT analysis could not provide ideal results under low levels of dynamic eccentricity (DE). In this paper, a combined use of the wavelet packet decomposition (WPD) and empirical mode decomposition (EMD) method is presented to diagnose the IM fault under low degrees of purely DE. The proposed method is based on the decomposition of apparent power signal and ex

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Chen, Bing, and Yu Guang Fan. "3D Modeling and Open-Close Motion Simulation of the Triple Eccentric Butterfly Valve." Advanced Materials Research 215 (March 2011): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.215.191.

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It was achieved with the benefit of excellent molding function of CAD/CAM, to solve the designing problems of rotation center of triple eccentric butterfly valve and to improve the seal performance. The Solid Edge software is applied to analyze the process of 3D modeling and motion simulation with details, as well as check both static and dynamic interference. In this way, the reasonable eccentric angle α, cone-apex angle 2β, radial eccentricity e and axial eccentricity C of valve board are acquired. It is effective to shorten the design period of triple eccentric butterfly valve, also improve

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Geller, Aaron M., Jarrod R. Hurley, and Robert D. Mathieu. "The progeny of stellar dynamics and stellar evolution within an N-body model of NGC 188." Proceedings of the International Astronomical Union 5, S266 (2009): 258–63. http://dx.doi.org/10.1017/s1743921309991128.

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AbstractWe present a direct N-body simulation modeling the evolution of the old (7 Gyr) open cluster NGC 188. This is the first N-body open cluster simulation whose initial binary population is directly defined by observations of a specific open cluster: M35 (150 Myr). We compare the simulated color–magnitude diagram at 7 Gyr to that of NGC 188, and discuss the blue stragglers produced in the simulation. We compare the solar-type main-sequence binary period and eccentricity distributions of the simulation to detailed observations of similar binaries in NGC 188. These results demonstrate the im

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Li, Hongqiang, and Ruihe Wang. "Research on a Measurement Method for Downhole Drill String Eccentricity Based on a Multi-Sensor Layout." Sensors 21, no. 4 (2021): 1258. http://dx.doi.org/10.3390/s21041258.

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The drill string used in drilling is in a complex motion state downhole for several kilometers. The operating attitude and eccentricity of the downhole drill string play important roles in avoiding downhole risks and correcting the output of the imaging measurement sensor while drilling (IMWD). This paper proposes a method for measuring eccentricity while drilling using two sets of caliper sensors coupled with a fiber-optic gyroscope for continuous attitude measurement, which is used to solve the problem of the quantitative measurement of complex eccentricity that changes in real-time downhole

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Zhou, Hailun, Liang Fang, Ming Zhang, Gangyi Cao, and Jianyang Su. "Study of the Effect of Static Eccentricity on Vibration Damping Properties of Squeeze Film Dampers Considering the Two-Phase Flow Case." Lubricants 12, no. 3 (2024): 75. http://dx.doi.org/10.3390/lubricants12030075.

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To analyze the effect of static eccentricity on the air ingestion distribution and vibration damping properties of the SFD, a numerical simulation study of SFDs considering two-phase flow was carried out based on CFD using a transient solution method and dynamic mesh technique. The results show that the angle between the static eccentricity direction and the circumferential direction of the oil supply hole increases and the air ingestion area in the oil film expands. In contrast, the oil film damping decreases, and the larger the static eccentricity distance, the greater its effect on the air

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Gu, X., and P. Velex. "On the dynamic simulation of eccentricity errors in planetary gears." Mechanism and Machine Theory 61 (March 2013): 14–29. http://dx.doi.org/10.1016/j.mechmachtheory.2012.10.003.

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Joksimovi, G. M. "Dynamic simulation of cage induction machine with air gap eccentricity." IEE Proceedings - Electric Power Applications 152, no. 4 (2005): 803. http://dx.doi.org/10.1049/ip-epa:20041229.

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Teyssandier, Jean, and Dong Lai. "Pulsed disc accretion driven by Hot jupiters." Monthly Notices of the Royal Astronomical Society 495, no. 4 (2020): 3920–28. http://dx.doi.org/10.1093/mnras/staa1363.

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ABSTRACT We present 2D hydrodynamical simulations of hot Jupiters orbiting near the inner edge of protoplanetary discs. We systemically explore how the accretion rate at the inner disc edge is regulated by a giant planet of different mass, orbital separation, and eccentricity. We find that a massive (with planet-to-star mass ratio ≳0.003) eccentric (ep ≳ 0.1) planet drives a pulsed accretion at the inner edge of the disc, modulated at one or two times the planet’s orbital frequency. The amplitude of accretion variability generally increases with the planet mass and eccentricity, although some

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Усманова, E. Usmanova, Короткий, Viktor Korotkiy, Хмарова, and Lyudmila Khmarova. "Computer Simulation of Kinematic Surfaces." Geometry & Graphics 3, no. 4 (2015): 19–26. http://dx.doi.org/10.12737/17347.

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A geometric surface model is formed taking into account given functional, structural, technological, economic, aesthetic requirements. These requirements are formulated in geometric terms and are expressed in terms of the surface parameters. The surface is modeled either Kinematics manner, or by way of a twodimensional interpolation. In accordance with in accordance with the kinematic method, the surface is formed as a continuous oneparameter many curves that form simulated in the surface. In accordance with the interpolation method, the surface

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Gong, Wan Ting, Rong Yang та Zong Min Liang. "Effects of Residual Stress on Bearing Capacity of Cold-Formed Thin-Walled Steel Members with “л” Section under Axial Compressive Force". Advanced Materials Research 243-249 (травень 2011): 1195–98. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1195.

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In order to enhance the pertinence of agriculture building design, the experiment and numerical simulation on cold-formed thin-walled steel members with “л” section under axial compressive force were conducted to investigate the effects of residual stress on bearing capacity of them. For the members, there are inevitably initial defects, such as initial bending, initial eccentricity and residual stress due to the manufacturing error. In the numerical simulation, initial bending and initial eccentricity of the members were considered. The results show that the residual stress affects instabilit

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Wang, Zhan, Wenzhi He, Siyuan Du, and Zhe Yuan. "Study on the Unbalanced Fault Dynamic Characteristics of Eccentric Motorized Spindle considering the Effect of Magnetic Pull." Shock and Vibration 2021 (April 24, 2021): 1–12. http://dx.doi.org/10.1155/2021/5536853.

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Unbalanced fault is the most common fault of high-speed motorized spindle, which is the main factor affecting the machining accuracy of high-speed spindle. Due to the unbalanced magnetic pull produced by the air gap eccentricity of the stator and rotor, the unbalanced vibration of the motorized spindle will be further aggravated. In order to explore the dynamic behavior and motion law of the unbalanced fault motorized spindle under the eccentric state, a dynamic model of the unbalanced fault of the high-speed motorized spindle considering the unbalanced magnetic pull was established. Taking th

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