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In the era of cloud computing, data is processed in agCloudh, and data and its dependencies between systems or functions progress and change constantly within the cloud, as auser's requirements change. Such information worlds are called cyber worlds. We need a more powerful mathematical background which can model the cyber worlds in the "cloud"as they are. We consider the Incrementally...
In order to study the influence of various design parameters of the Screw Die to the flow channel and extrusion uniformity, FEA (finite element analysis) was made by parametric modeling, parametric loading and solving, as well as parametric post-processing method. APDL (ANSYS parametric design language) and VISUAL C++ language were used to replace the work of ANSYS pre-processing function. Special...
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...
In order to improve the stiffness and reduce the weight of the main support structure of space camera, some problems in the truss design were taken into account in this paper. A 4-layer multi-truss made of carbon fiber composite was used in the main support structure for designing a kind of space camera with 7m focal length, relative aperture 1:6. The angles between trusses, pole cross section and...
This paper investigates the cased-based design of the engineering clamp hangers and develops an integrated computer-aimed design system, aiming at optimizing the whole hanger structure and meanwhile keeping the strength security. The structure and the working load status of the clamp hanger are firstly analyzed. Then the general tHought, the structure design, the model Check & strength verification,...
Effects of retention groove location and dimensions of threaded glass fiber post on the maximum retention force of the restorative system and the maximum equivalent stress in the root were numerically investigated. Results show that the retention groove can effectively enhance retention ability and reduce the stress in the root. And the maximum retention force of the restorative system can be increased...
The objective of this study is to analyze the differences between split post-crown rehabilitation system and split post-core-crown rehabilitation system. Stress distributions of the models in different rehabilitation systems could be obtained through reverse engineering, virtual surgery and three-dimensional finite element analysis. Results showed that strong stress concentration appeared at the contact...
The objective of this paper is to optimize the structural parameters of the Permanent Magnet Drive by minimizing the manufacturing costs while maintaining the output performance. The electromagnetic analysis of the Permanent Magnet Drive is carried out by the Finite Element Method. In order to debasing the cost of calculation and time, the rapid calculation model which can map the relationship between...
Considering the influence of material original flaw, combining with Finite element analysis results and linear elastic fracture mechanics methods, the thesis gave a certain type of casting crane girder for example to analyze its fatigue life including the designing, remaining and service life based on fracture mechanics and the design principle of disrepair-security. It offers more reliable theoretical...
A numerical analysis on the portal of two parallel tunnels is carried out, to learn about the effect on the staggered space of two tunnels to the liner stress of tunnel's portal. Thirty numerical models have been founded for analysis base on the different of staggered space of the two parallel tunnels. The results show that: if the clear distance and the separated mileage make change, the extreme...
The numerical simulation on welding process of simple structure in the paper, there are many problems have been handed. for example moving heat, latent heat of phase change and characteristic parameters of materials reduce nonlinear analysis and improve the efficiency by indirect method to calculate constructive field. ANSYS software was applied to analyze temperature field and stress field of welding...
Transducer is the main product which the giant magnetostrictive material applied for and Terfenol-D rod is the core component of the giant magnetostrictive transducer. Using ANSYS software analyzed the radial distribution rules of internal magnetic field intensity on Terfenol-D rod in high-frequency driven, which provided the theoretical guidance for reasonable and effective application of magnetostrictive...
The expression of radiate power and bandwidth are presented by using the aquivalent circuit model of the longitudinal vibration transducer. At first, the design variable and its constraint condition are exerted based on the design and environment in which the transducer is used. The optimization mathematical model of Tonpilz transducer is built up. Design variables of the resonance frenquency of 30kHz...
In the last half a century, the complexity of electronic systems has undergone a sustainable rapid development stage following the Moore's law: the density of integrated circuits (ICs) was doubled every two years. As a result, electronic devices become more miniaturized in space and contain more power in unit volume. Electronic package has to deal with highly increased I/Os with fine soldering pitch...
Infrared thermography has become increasingly important for non-destructive testing to detect internal defections, involving delaminations, cracks and voids. In this paper, the principle of infrared thermography is presented briefly. And a finite element approach is proposed to simulate the process of infrared thermography nondestructive testing about QFN packages. By changing with the length and...
Finite element analysis technology is an effective approach to research on mechanics performance of rubber component, but it is difficult to estabLish accurate finite element analysis model. Uncertainty of rubber parameter make theoretical analysis impossible quantitative. Rubber parameter of single metal floating face seals are gained accurately by adapting the theoretical analysis and tests, which...
The wireless temperature sensor could be widely used in on-line temperature monitoring of electrical equipment. In order to power wireless sensor and be isolated with high voltage, two novel kinds of micro generators excited by stray energy in electrical equipment are proposed. The vibration generator and temperature gradient generator could harvest mechanical vibration energy and heat energy in the...
The normal force characteristics of single-sided linear induction motor is analyzed using multilayer theory and finite element method (FEM). It is found that the magnetic permeability of back iron affects the analysis results obviously. In this article the equivalent magnetic energy method is used to correct the permeability of back iron in multi-layer approach. As the simulated object, the normal...
The vertical cavity surface emitting laser (VCSEL) is a very unique semiconductor laser diode since it operates in low current and can be tested during the fabrication process. Therefore, VCSEL is more preferable than the conventional edge-emitting laser diode for certain applications. However, the cavity design of a single-transversal-mode VCSEL is not straight forward. This research will explore...
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