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In this paper, a 5kW novel multistage axial-flux permanent magnet machine (M-AFPM) is analyzed. As a key part of the machine, stator core of silicon steel and SMC are studied by 3D finite element method (FEM) respectively. No-load, full-load, magnetic field distribution, core loss, etc. are calculated. FEM result indicates that SMC-materials have almost equal influence on EMF, magnetic field distribution...
Effects which arise as a result of Hertzian contact between adjacent spheres of a granular chain can potentially change the nature of a signal as it propagates down the chain. The possibility thus exists of generating signals with a different harmonic content to the signal input into one end of the chain. This transduction mechanism has the potential to be of use in both diagnostic and therapeutic...
The aim of this paper is to investigate the propagation of ultrasonic waves in a steel wire and to determine whether it is possible to detect and locate the defects by the finite element method. First, the dispersion curves of longitudinal modes were obtained and calculated analytically. Then, the ultrasonic guided waves propagating in a steel wire with or without defects were simulated by the finite...
A 3D finite element model of a prestressed concrete composite box girder with waveform steel webs is established by means of the composite element method. The influence about geometric parameters of waveform steel webs is analyzed by used linear and nonlinear finite element calculation of steel box girder. It shows that bending stress and warping stress was reduced by increasing the bending angle...
In order to study fire behaviors of steel member and the effect of fire conditions on its reliability, fire response of restrained steel beam was implemented by non-linear finite element method. The temperature distribution and deflection curve of beam acquired from numerical simulation are good correlative with ones of experiment. Based on this, the reliability model of steel beam was established...
The ratio of the temperature gradient at solidification front to the solidification rate of solid-liquid interface plays a great role for columnar grain growth. Transient temperature fields of directional solidification of Al-Ni-Co-Ti alloys were studied based FEM. The effect of molten steel pouring temperature, heat flux and mould temperature on the ratio was analyzed. The results show that molten...
Corrosion of oil tubular goods is becoming more and more serious in the exploitation of oil and gas wells, so it is very significant to study new anti-corrosion materials of lined steel pipe. Aiming at the mechanical problem of lined steel pipe hydro-forming, a parametric finite element analysis (FEA) mechanical model is established in this paper to simulate the plastic forming process of lined steel...
Electromagnetic stirring (EMS) systems have been extensively used in the continuous casting process in steel-making industries to produce high-quality steel products. Although the operational principles of such EMS facilities are well established and extensively applied, demonstrations of actual stirring effects on molten metal are always desired for comparative investigations. To fulfill the requirements...
This paper investigates the influence of soil-structure interaction (SSI) on seismic responses of long-span space truss roof. First, a three-dimensional (3D) integral finite element (FE) model of a typical regular pyramids space truss structure consisting of space truss roof and support columns is developed. By applying FE method for near field soil and infinite element (IE) method for far field unbounded...
The overall stability and local stability of legs on UHV transmission steel tubular tower are controlled by the slenderness ratio and the diameter-thickness ratio of steel bar respectively. 8 typical steel tubular towers with double circuit transmission lines on the same tower in 1000kV transmission project of Anhui Province-Shanghai (the 1000kV Huainan to Shanghai transmission line, the PROJECT as...
An efficient optimization strategy is proposed firstly, which draws together the global searching capability of chaos-based optimization technique and high searching efficiency of trust-region Newton method. Based on component mode synthesis method, the proposed hybrid optimization method is applied to update the finite element model of an arch bridge model using the dynamic measurement data, and...
Through the analysis of dispersion equation and curves of ultrasonic guided waves in the steel pipes, L (0,2) and T (0,1) mode are applied to the defect detection field. The finite element method is used to analysis the propagation and reflection process of L (0,2) and T (0,1) mode guided waves in the steel pipes with depth varying middle defects, and the conclusion that the relationship between the...
The axial load is generated for 64m and 80m lift masts under the state of vertical hoisting, so it is needed to analyze the total strength and stability of the lift mast to ensure the hoisting security before formal application. Critical load of linear elastic buckling is computed for 64m and 80m large lift mast under the condition of inclined steel cables on the top by the use of nonlinear FEM method...
According to the rolling behavior of some plate mill, a 3D elastic-plastic FEM model based on full restart skill of ANSYS/LS-DYNA was established for plate mill. The simulate to the multiple passes plate mill rolling procedures is achieved with the residual stress of previous pass is inherited. By comparing with measured data, it can be seen that the full restart method can be used to analyze the...
The injury on strips is one of universal phenomenon during transferring, which reduces finished product rate. That technical problem is waiting to be solved. The virtual prototyping model of the automatic vertical tong has been built up based on the MSC software ADAMS in this paper. The load and boundary conditions of components are used to build the finite element model obtained by static analysis...
UCM cold rolling mill has strong ability of crown and flatness control, but it seriously lacks the edge drop control ability. In this paper, an explicit dynamic finite element method is adopted to build a combinatorial simulation model for roll stacks and strip, based on the 4-stand PL-TCM cold rolling mill of Masteel. Then the method of optimizing the intermediate roll shift position is proposed...
As the support of boiler components, the seismic performance of boiler steel frame must be ensured. Taking a steam boiler steel frame as the research object, its finite element analysis model was built with I-DEAS software. To execute the Response Spectrum analysis, the modal mode was generated using the Response Dynamics solver to obtain the normal modes and the constraint modes. According to the...
Based on Component Mode Synthesis method, the vehicle-bridge interaction problem of a concrete-filled steel tubular tied-arch bridge was analyzed. The mathematical model assumed a finite element representation of the bridge together with beam, shell, and link elements. And the vehicle simulation employed a three dimensional linear vehicle model with seven independent degrees of freedom. A well-known...
The deep foundation fit of Xin Ming He building was reinforced by soil nail, shot concrete and steel bar mesh, and the calculated pressure per unit area of soil nail is about 83.48kN which is larger than the largest lateral earth pressure which is about 59.55kN, from which it can be known that the foundation fit is stable. Meanwhile, the 3D-σ finite element program was used to simulate axial force...
Heating, holding and cooling stages in rail-head's quenching process were all numerical simulated by FEA software ANSYS, the time-varying temperature fields at heating, holding stages and the structure after water-cooled were obtained, and the numerical simulation method to predict the quenching results was provided. It is significantly valuable for parameters' selection in heavy rail's technical...
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