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This paper presents the study and analysis of the error field of Joint TEXT tokamak. Error fields are first calculated through both the finite-element method and the theoretical method. Then, a Fourier decomposition of the error field is performed on the plasma surface to evaluate the lower mode ($m$ , $n$ ) = (1, 1), (2, 1), and (3, 1) error fields. The results of the two methods are notably consistent...
Micro electrode array is a novel tool to measure in-situ neural physiology. However, the quantitative analysis tools for design parameters of micro electrodes are deficient by now. This paper systematically introduced finite element simulation for electrode materials and electrical characteristics design, then Monte-Carlo statistical model was adopted to determine the film particle diameter and effectiveness...
In this paper a finite element (FE) model of dual-span rotor system with rub-impact at fixed limiter is established. The system motion characteristics in different rotating speeds and rub-impact rod stiffness are investigated numerically by using Hilbert-Huang transform, a relative novel time-frequency analysis method. The results show that the effects of variables on system motion patterns, response...
The spindle is an important part of a CNC machine tool, and it is very significant to study how to simulate the deformation of the spindle accurately no matter in theoretical or practical way. Traditionally, the boundary coefficients for simulation have always been defined as some constants with the help of personal experience. This is the main reason for inaccuracy in the thermal model deducing....
The paper presents a relative novel time-frequency analysis method which applies in the vibration Fault analysis of rotor systems through Hilbert spectral analysis (HSA), the part of the Hilbert-Huang transform. Using this method we analyze the vibration fault characteristics of the rotor system with rub-impact by compared with non-rubbing rotor system both in experiment and simulation. Firstly, a...
Due to the material deformation process in drilling are quite complicated, research using finite element simulation on drilling is limited and not widely reported. To investigate drilling process, a coupled thermo-mechanical finite element model of drilling is developed. Several key technologies, such as material constitutive model, material failure law, contact and friction law, have been implemented...
The development techniques of implementation of converting the medical slice images to 3-D finite element grids are discussed, and an integrated system based on ITK and VTK is built. The system can provide a series of functions including image reading, reduction, segmentation, reconstruction and finite element grids generation with flexible user's graphics interface. At same time, this system can...
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