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In this paper, we proposed an analysis method of long-time behavior of the electromagnetic device. The dynamic characteristics of a circuit breaker with oil dashpot are clarified using the proposed method. Furthermore, the effectiveness of calculated results is verified through the comparison with the measured ones.
In this paper, the unbalanced magnetic pull and eccentric mass force which caused vibration of the rotor are introduced. The virtual displacement method is employed to solve the two kinds of force. The inherent characteristics of rotor are analyzed through finite element method and experiment. The dynamic response and axis locus of rotor under the action of unbalanced magnetic pull and eccentric mass...
The purpose of this paper is to present a study on the power quality issue based on the harmonics present in the slots of induction motor due to broken bar fault in induction motors. This paper presents numerical magnetic field analysis of squirrel cage induction motor based on finite element method. Finite element analysis can be used for predicting the performance of an induction motor having different...
Prevalence of LBP has led researchers to find out biomechanics of lumbar spine in conjunction with the surrounding muscles and the role of intra-abdominal pressure in different activities. Despite substantial number of experimental studies in this field, limitations of in-vivo experiments have guided researchers to utilize mathematical modeling to obtain more information regarding the spine biomechanics...
The study on the liver deformation during the needle inserted into the target lesion, plays an important role in the robot-assisted liver tumor coagulation therapy system, which impacts the operation simulation, the pre-operative surgical planning, the treatment accuracy, and the success rate. To this end, this paper presents a quasi-static finite element method to analyze the deformation of the soft...
A combined driving force model consisting of three driving forces is implemented for copper dual damascene line-via interconnects using finite element method. Good agreement is found between the experimental and computational results on the void volume at failure and time varying resistance change during electromigration stressing. The void evolution is also computed showing the process of the void...
Voltage controlled oscillators (VCO) with high quality (Q) factors require wide tuning ranges and low phase noise performance which depends on the tunability of the capacitors in the LC tank circuit. Microelectromechanical (MEM) varactors are being considered as replacements for VLSI on-chip variable capacitors due to the susceptibility of the latter to phase noise and low Q-factors. This paper presents...
3D parametric deformable models have been used to extract volumetric object boundaries and they generate smooth boundary surfaces as results. However, in some segmentation cases, such as cerebral cortex with complex folds and creases, and human lung with high curvature boundary, parametric deformable models often suffer from over-smoothing or decreased mesh quality during model deformation. To address...
We report comprehensive modeling and simulation of Zinc Oxide (ZnO) nanowires. Both static and harmonic analyses were performed using commercial FEM analysis software. We also carried out theoretical studies based on fundamental beam theory for comparative studies in determining capabilities of FEM modeling for nano-scale structures such as the ZnO nanowires being reported. Static deflection, piezoelectric...
This paper presents a novel constraint method for dynamic modeling and simulation of needle insertion based on FE framework. Modeling of the interactive events during a needle insertion procedure such as contact, puncture and friction using the finite element method is cumbersome due to the need to continually update the mesh to match the geometry of the discontinuity. Here, we describe a Local Constraint...
Soft tissue palpation plays an important role in diagnosing various diseases. Palpating skills are tedious to learn due to the difficulty of describing the sense of touch. Because of its interactive nature, a virtual reality (VR) training system embedding with real-time soft-tissue models may be helpful to teach such skills to medical residents. Studies show that such a VR system impacts human perception...
This paper presents the mechanical effect on transformers when subjected to one of the power quality indicators, i.e., the electromagnetic transients. A common reason for internal faults in transformers windings is the weak insulation. This effect can be caused and accelerated by the electromechanical efforts produced by the inrush and short-circuit currents. Even though the transformer energizing...
Displacement is a significant operator to solve spatial conflicts of road elements. At present, detection and adjustment of spatial conflicts are still in the manual stage, requiring a lot of manpower, resources and time. Therefore, it is urgently needed to study displacement operation thoroughly, whether for auto map production or the actual needs of mapping applications. Fortunately, structure mechanics...
This paper proposes a method to evaluate Thermoresponsive Gel probe (GeT probe) which was newly developed and also a method of manipulating microobjects in liquid. The proposed GeT probe realizes the pick and place of microobjects using adhesion to the thermoresponsive gel. The probe has a microheater, which can generate the thermal gel at the probe tip. The 10 wt% poly(N-isopropylacrylamide) (PNIPAAm)...
A new type of double-layer plastic greenhouse was designed and analyzed, which can effectively reduce the displacement of arch, and increases the overall structural stability of arching in different direction. Using three-dimensional modeling software, the mechanical model of outside shed is built, and the stability is accurately analyzed by finite element analysis software. Calculation results show...
Based on special topography of the LiShan tunnel of the Hefei-Fuzhou passenger dedicated line in Wuyuan, Jiangxi province, this paper analyzes the vault settlement, surrounding rock stress, initial supporting axis force and supporting bending moment of slopes with different angles to the horizontal plane by the finite element method, which shows: keeping the overburden thickness of tunnel roof invariant,...
Crankshaft is one of the most important components if diesel engine, and its design and improvement are very important to engine design and improvement. So the crankshaft intensity checking system based on simply-supported beam method is programmed by VC++. Then a real crankshaft is checked using this system and the results show that this system can be useful to crankshaft checking.
Firstly, based on the Ottosen-four parameter failure criterion, establish material constitutive mode with damage factor. Then, in circumstance of large non-linear dynamic finite element software (ANSYS/LS-DYNA), build the combinative cutting model of advanced knife and scraper under different altitude difference. In addition, three-dimensional dynamic simulation of cutting characteristics is applied...
We present an effective method based on Schwarz-Christoffel (SC) mapping for computing the cogging force of a permanent magnet linear motor (PMLM). The permanent magnets (PMs) are substituted by equivalent line currents at Gaussian integration points. Using numerical SC mapping, one pole-pair of the PMLM is mapped to a configuration where the magnetic field can be solved analytically. The cogging...
In this paper, the CAE (Computer Aided Engineering) technology and Vertical Roller Mill Device (VRMD) are described. The equivalent stress and overall displacement nephogram were obtained by the co-simulation analysis of VRMD with three software Pro/E, ADMAS and ANSYS. It is verified whether the force of VRMD meet the design requirements. The co-simulation method provides a reliable basis for VRMD...
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