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It is very important to analyze the dynamic characteristics for the crankshaft during the working process. By use of ANSYS software of finite element model of the crankshaft modal analysis to get the top 20 order natural frequency and the corresponding vibration mode, and put forward the possible resonance risk and design concerns. It has some guiding significance for the design and manufacture of...
This paper proposes an effective electromagnetic analysis method for simulating periodic organic solar structures. The Finite Element Method (FEM) is derived to analyze the Organic Solar Cell (OSC), and the Periodic Boundary Condition (PBC) is enforced on the boundary of the OSC to model the infinite organic solar structure. So that the infinite organic solar structure can be solved by analyzing only...
Using analytical calculations, a precise large signal equivalent circuit model of square CMUT dynamics was developed. The model predicts many intrinsic properties of a square CMUT cell including resonance frequency, phase and magnitude of the membrane displacement, membrane velocity, electrical conductance, collapse voltage, etc. ANSYS 3D finite element analysis (FEA) was used to validate the equivalent...
This paper discusses the implementation of the inverse Jiles-Atherton (JA) vector hysteresis model with 2D FEM for the analysis of a hysteresis motor. A differential reluctivity tensor couples the hysteresis model with the magnetic vector potential based FE model.
Gas insulated switchgear (GIS) is widely used for its good economic benefits. But mechanical faults caused by electromagnetic force occur occasionally. The conducting wire and the metal shell are exposed in the alternating electromagnetic field, which is caused by the load current and vortex. This leads to electromagnetic force because of electromagnetic induction. So it is necessary to analyze the...
Unlike to current transformer, a residual current sensor is highly sensitive to the input leakage current and core material. It senses the leakage current that is produced due to faulty condition in the electrical circuit or unintentional body touch to the equipment through conductive tracking of the insulation medium. The leakage current which the sensor detects consists of ac residual current with...
Composite elastic constants prediction is an essential issue in composite mechanics. In this paper, a variety of experiments are used to measure the macro elastic constants of composite. Then the macro stiffness predictions of unidirectional composite based on finite element analysis (FEM) are conducted. Through this five independent macro elastic constants of composite (EL — longitudinal modulus,...
Preheating for nonferrous metals in industry is realized through induction furnaces with a large capacity at commercial frequency. The energy efficiency of this process is about 50%–60% due to enormous energy loss through the copper coils. An ac induction furnace applying 2G high-temperature superconducting (HTS) magnets has been suggested in order to achieve higher efficiency. The most important...
Design of any system in particular electrical motors requires knowledge of all aspects of design, So Designing is a complex and unique process. Usually, after the initial design of electrical motors, modelling is integral part of designing. Due to acceptable accuracy and high speed, the Magnetic Equivalent Circuit (MEC) model used for modeling. Due to the high accuracy, finite element model (FEM)...
Comparison of FEM simulations and experimental data about low-frequency spectra for a party of hemispherical quartz-glass resonators have been discussed as well as prediction of their values in the assemblies of the gyroscopes.
Analysis method and computational solutions for thermo-and electrostatics effects of slender bodies often using multi-scale modeling, molecular dynamic simulation and data visualization technique. In the present work, we conduct a review of applying analytical methods such as BEM and FEM and molecular dynamics and computational methodologies to model the thermal and electrostatics effects on the slender...
This paper comes to support choosing a type of parabolic antenna for RF distributors. To do that, authors was done a series of analysis on the paper with purpose of finding an optimum solution. One of those analysis was to find a distance from the LNB to antenna's reflector. This distance was varied from 0 to 1m. On the same analysis was done another analysis, to determine that are the most favorable...
A thermal-mechanical coupled finite element analysis model of solder joints is established, which plays a role in mechanical support and electrical connection in flip chip. Periodic temperature cycle load (−45°C∼125°C) applied on the solder joints and it will generate periodic internal stress and strain in the process of the temperature cycling. With repeat using, the solder joints will produce deformation,...
A thermal-mechanical coupled finite element analysis model of solder joints is established, which plays a role in mechanical support and electrical connection in flip chip. Periodic temperature cycle load (−45°C∼125°C) applied on the solder joints and it will generate periodic internal stress and strain in the process of the temperature cycling. With repeat using, the solder joints will produce deformation,...
The Molding process of injection-molded plastics induces certain characteristics in the material that are not accurately modeled in the conventional FEM methodologies for Mechanical stress analysis and Modal analysis. This paper brings out the challenges that are encountered in the current simulation methodologies and discusses few of the methods practiced in the industry to overcome these challenges...
In this paper, according to the actual working conditions of suspended pipeline sealer, simulation and theoretical analysis of structural strength are carried out. On the platform of FEM, stress and strain of pipeline are analyzed by using software ANSYS. Furthermore, on the basis of critical buckling strain method and mechanical principle, critical buckling strain and actual pressure are calculated...
An analysis of an iron pole piece PPM code based on the Finite Element Method (FEM) for traveling-wave-tube (TWT) design is presented. The XMAGUN was developed to determine the axial and radial magnetic fields inside such devices. During simulations, the outer pole piece radius was varied and, as a result, it was obtained a growth of the axial peak magnetic field value when the outer pole piece radius...
The change of screw assembly stress and bearing preload on inertial platform system is the main cause of inertial platform system parameters drift such as constant drift and angular misalignment. The paper appropriately simplifies the complexity structure of the inertial platform system components, discusses the inertial platform system screw assembly stress and bearing preload finite element modeling...
In high-performance integrated circuits, electrothermal effects have important implications for both performance and reliability. This paper presents a detailed modeling and analysis of the electrothermal effects of global interconnects. Interconnect Joule heating increases the line temperature whereas the rise of the temperature decreases the power dissipation due to the increase of the line resistance...
The acoustic numerical value simulation is significant for reducing rail-wheel noise, the effect of damping layer on reducing vibratin and noise can be validated basing on the acoustic numerical simulation. The finite element model of wheel vibration is built, the wheel vibration response is calculated by use of FEM. Then, the vibration velocities of wheel surface are extractd and are used as boundary...
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