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Dynamic Modelling of a Hybrid Variable Reluctance Machine Using the 3D Finite Element Method

Journal of Electromagnetic Analysis and Applications 2024年第7期16卷 103-113页

作者： Dingamadji Hilaire Belemdara Jérôme Mbaïnaïbeye Department of Physics and Engineering Sciences University of NDjamena NDjamena Chad Department of Physics University of Moundou Moundou Chad

This paper presents the work carried out to evaluate the dynamic performance of the Hybrid Variable Reluctance Motor (HVRM). The fourth-order Runge-Kutta integration algorithm was employed to solve the equations of the dynamic model, in conjunction with the three-dimensional finite element method. The 3D numerical data was calculated using Comsol Multiphysics, which accounts for the nonlinearity of the ferromagnetic material and the 3D nature of the HVRM. The outcomes of this study are precise and accurately predict the dynamic behaviour of the HVRM in terms of rotor position response, rotational speed and torque. The distinctive contribution of this work lies in the 3D numerical modelling of the HVRM and the subsequent evaluation and analysis of its dynamic operation. Analytical and numerical 2D studies are less resource-intensive and time-consuming, and are more straightforward and rapid to analyse and interpret. However, they are constrained in their capacity to examine spatial, volumetric interactions and intricate dynamics such as flux studies where three 3D effects cannot be disregarded, winding end effects and the configuration and positioning of the interposed permanent magnet.

关键词： Numerical Computing Complex Dynamic Flux Linkage 3D Effects equilibrium position

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Numerical study on heat and mass transfer mechanisms of Janus particle sedimentation considering corrosion

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Particuology 2023年第12期83卷 71-90页

作者： Zhiguo Xu Zelin Zhao School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240China

Janus particle is a research hotspot due to its novelty and settlement in acid liquid during wastewater *** and mass transfer mechanisms of Janus particle sedimentation considering corrosion are numerically investigated based on immersed boundary lattice Boltzmann *** reaction heat ratio,Damkohler number,Peclet number,and particle number effects on temperature field,concentration field,Janus particle mass reduction,position,and velocity are *** uniform particle has an equilibrium position of about 1/4 times the channel width for two corroded uniform particle settlement *** Janus particle horizontal position deviates from the uniform particle equilibrium position due to the force caused by nonuniform buoyancy and particle *** the chemical reaction heat ratio is more than 1,the Janus particle horizontal position is closer to the channel centerline and has a positive ***,the converse trend happens when the chemical reaction heat ratio is less than 1,and the Janus particle horizontal position has a negative *** Janus particle horizontal position deviation magnitude increases with increasing Damkohler number and decreasing Peclet *** horizontal position deviation phenomenon exists for the single corroded Janus particle and two corroded Janus particle settlement processes.

关键词： Janus particle Corrosion equilibrium position Chemical reaction heat ratio Temperature

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Determining spatial structures of ion crystals by simulated annealing method

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Chinese Physics B 2017年第8期26卷 50-53页

作者：武文博吴春旺李剑欧保全谢艺吴伟陈平形 College of Science National University of Defense TechnologyChangsha 410073China Interdisciplinary Center for Quantum Information National University of Defense TechnologyChangsha 410073China

Calculating the spatial structures of ion crystals is important in ion-trapped quantum computation. Here we demon- strate that the simulated annealing method is a powerful tool to evaluate the structures of ion crystals. By calculating equilibrium positions of 10 ions under harmonic potential and those of 120 ions under anharmonic potential, both with the standard procedure and simulated annealing method, we find that the standard procedure to evaluate spatial structures is complicated and may be inefficient in some cases, and that the simulated annealing method is more favorable.

关键词： quantum information ion trap ion crystal equilibrium position

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On edge dislocation in a multilayered laminate

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Theoretical & Applied Mechanics Letters 2011年第2期1卷 25-28页

作者： Xu Wang~(a) School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237, China School of Mechanical and Power Engineering East China University of Science and Technology Shanghai 200237 China

We investigate the elastic field induced by an edge dislocation in a multilayered laminated composite composed of(N—2)thin bonded elastic layers sandwiched between two semi-infinite elastic media.A simple closed-form solution is obtained when all the phases have equal shear modulus but different Poisson's ratios,and when the dislocation is located in the upper semi-infinite *** image force acting on the dislocation due to its interaction with the multilayered structure is also derived. Several specific examples are discussed in detail to illustrate the mobility of the edge dislocation. Some interesting behaviors of the dislocation are *** results indicate that it is possible to find at most(N—2)equilibrium positions for the edge dislocation in an N-phase composite structure.

关键词： laminated composite edge dislocation image force equilibrium position

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Dipole of Edge Misfit Dislocations and Critical Radius Condition for Buried Strained Nanoscale Inhomogeneity

Dipole of Edge Misfit Dislocations and Critical Radius Condi...

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中国力学学会学术大会'2009

作者： Liu YW~*,Fang QH~*,Wen PH~+ * College of Mechanics and Aerospace,Hunan University, Changsha 410082,China + School of Engineering and Material Sciences,Queen Mary,University of London,London,E1 4NS,UK

A theoretical model is proposed for elastic stress relaxation of a buried strained nanoscale cylindrical inhomogeneity,which assumes the edge misfit dislocation dipole formation in the soft matrix at the some distance from the *** critical radius of the inhomogeneity for the formation of the edge misfit dislocation dipole is *** influence of

关键词： Misfit dislocations Stress relaxation Inhomogeneity equilibrium position Critical radius

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