Abstract Taking moving trestle of machine tool as examplethe modal analysis and harmonic response analysis were done by means of finite element method Find out its characteristics of vibration modal The analysis is conducive to the design of the moving trestle of machine tool It makes a base for optimized design and remanufacturing
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The number and types of FE analyses spans the whole spectrum of physical behaviours and interactions Generally speaking the finite element method represents mechanics as the interaction between a set of elements with simplified physical behaviour In its most simple incarnation elements are effectively a spring with a size and stiffness
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tunnelling operations were modelled using the finite element method in order to investigate the effect of these construction processes on the ground response A excavating finite element introduced in front of the cutting face of the tunnel boring machine and the operation of
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experience as well as the losses Based on concentrated windings theory an analytical model is developed to calculate the parameters of the machine which is the aim of this thesis The lightest design is selected and its election is motivated in order to achieve a lightweight design Chapter 6 introduces a program based on the FEMM
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The accuracy of the method has been verified with finite elements simulations and with the equivalent circuit on a real motor II MATHEMATICAL MODEL A general multiregion problem is analyzed Figure 1a shows a sextant of a motor comprising of N 5 concentric cylinders The excitation is an infinitesimally thin and axially infinite current
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linear elastic finite element model to a fully nonlinear three dimensional finite element model incorporating geometric nonlinearities and frictional contact For version 10 of this document the primary focus is on how to evaluate factors of safety for a single bolt of a bolted joint once the axial and shear loads on it are known The load can be
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In this thesis the nature of asynchronous and synchronous torques in a splitphase induction machine is investigated and quantified The equivalent circuit for this type of machine is derived using the rotating field theory It is extended to include harmonic effects Using this
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To solve the problem that gravity deformation curve of largespan castiron beam analyzed by finite element method simulation is inaccurate due to material imperfection a discretization calculation considering the inhomogeneity of the material based on finite difference method is proposed
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Ideally centrifugal compressor impellers have thin airfoil blades that are strong each mounted on a light rotor This material would be easy to machine or cast and inexpensive Additionally it would generate no operating noise and have a long life while operating in any environment
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The finite element method is used to analyze stress and electromagnetism field and dynamic characteristic The multiphysics field iteration design is carried out by optimization analysis of the finite element software A highspeed PM machine with rated speed of 60000 rpm 75kW is presented with this method
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Aug 19 2018 Bearings are key elements for a detailed dynamical analysis of rotating machines In this way a rotating component sustained by flexible supports and transmitting power creates typical problems that are found in several machines being that small or large turbines turbo generators motors compressors or pumps
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mechanism of radial electromagnetic force the analytical method and finite element method are used to analyze the magnetic field of air gap Take 42 pole and 84 pole as the example the radial electromagnetic force of different pole numbers are obtained
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The finite element method employs quadratic elements in an unstructured triangular mesh and the finite volume method uses the Rusanove to reconstruct the numerical fluxes The numerical coupled method is highly efficient accurate well balanced and it can handle complex geometries as well as rapidly varying flows
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VERSATD2D is a computer program for dynamic 2D planestrain finite element analyses of earth structures subjected to dynamic loads from earthquakes machine vibration waves or ice actions The dynamic analyses can be conducted using linear or nonlinear or nonlinear effective stress method
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calculation 3 Finite Element Analysis 8 Introduction Stress and Equilibrium Boundary Condition Strain Displacement Relations StressStrain Relation Temperature Effects Potential Energy and Equilibrium RayleighRitz Method Galerkins Method
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The natural frequencies and modes of the sand dam of the Kremenchug hydroelectric station located on a layer of compressible soils underlain by rock were determined by the finite element method On comparing the periods of natural oscillations of the dam found from the data of its calculation and experimental investigations under the effect
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method The 3D finite element magnetic field analysis was conducted to refine the design and calculate some key parameters An equivalent electric circuit was employed to predict the motor performance To verify the theory a prototype motor was constructed and operated by a
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The process of mixing the sand mixture is carried out in a controlled manner in the pan by the mixer blade and rotor which are rotated in the pan and continuous mixing is carried out This paper will deal with finite element analysis of mixer blade and optimization of the weight of the mixer blade
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The finite element method is a numerical technique that can be used to approximate the modal parameters natural frequencies and mode shapes of complex structuralmechanical systems A finite element model is typically much more detailed than an experimental model operating deflection shape or experimental modal analysis
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Introduction 11 Geotechnical engineering is the branch of civil engineering that is concerned with the characterization of the subsurface determination of engineering soil properties and the analysis design and construction of geotechnical systems
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Therefore any simplest method of calculation of the speedtorque characteristic based on the physical model of the induction motor and giving satisfactory results is useful We can combine the second and the third method and the skin effect in rotor winding can be considered if we use a special class of equivalent circuits
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To improve the ability to make rational analysis and accurate dynamic performance of machine tool this paper presents an analysis method of modal improved driving shaft based on the amount of calculation the flow and the external factors are improved the method can improve the design level of machine tool making full analysis and detailed characteristics of the whole machine for further improvement of the
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Due to the complex structure of the spindle system the finite element method is used to analyze it and the critical speed of the rice milling machine spindle at different speeds is investigated to provide a method for its calculation to provide a reference for the calculation of
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In this paper we compare the effectiveness of the embedded finite element method EFEM and the extended finite element method XFEM in modeling dynamic crack propagation by validating each approach against an impact experiment performed on single crystal quartz together with insitu imaging of the dynamic fracture using Xray phase contrast
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method and Finite Element Method FEM Then researchers founded that Finite Element Method was the best modal for finding the natural frequencies The present study is aiming to discuss the different types of research in the field of rotor dynamics The introduction of different mathematical models or application of finite
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THEORY Finite Element Method FEM In this paper FEM mode was implemented for the accomplished in a Thermo Haake machine by blending the fibre of 250m size and PCL polymer at 70oC with rotor speed at 50 rpm for only 20 minutes The bubble sand
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of components including power amplifier and displacement sensor were developed The finite element method based on Timoshenko beam theory was applied to the rotor dynamics model The dynamic analysis of the rotor is the foundation of the controller design Hence modal analysis had been done obtaining rotor dynamic properties via synthesis of natu
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In the present paper we em procedure employing a sliding mesh technique to couple the sta ploy an advanced noncommercial finiteelement method FEM tionary mesh stator and the moving mesh rotor at the airgap code Sally2D successfully applied in the analysis of addi interface 6 tional rotor losses in induction motors 5
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Finite Element Method Analysis of the Electromagnetic Field of Brushless DoublyFed Machine346 X Deng G Tang H Zhang X Zhang
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electric vehicle EV is presented It used sizing equation and Finite Element Analysis FEA AFPM motor is a hightorquedensity motor easily mounted compactly onto a vehicle wheel tting the wheel rim perfectly A preliminary design is a doublesided slotted AFPM motor with 6 rotor poles for high torquedensity and stable rotation
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Abstract Taking moving trestle of machine tool as examplethe modal analysis and harmonic response analysis were done by means of finite element method Find out its characteristics of vibration modal The analysis is conducive to the design of the moving trestle of machine tool It makes a base for optimized design and remanufacturing
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