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As bearingless motors have all advantages of magnetic bearings; they play an important role in solving difficult problems of special electric drives. The simplest and most versatile form of bearingless motor is the bearingless slice rotor motor. This kind of motor with centrifugal pump has a wide range of applications in life science, chemical processing industry, semiconductor manufacturing industry,...
Aiming at pounding of expansion joint in multiple continuous girder curved ramp bridge, the paper builds space dynamic model of a curved ramp bridge with expansion joint, and simulation of pier column, beam, bearing and expansion joint. Using nonlinear time history analysis, the paper demonstrates expansion joint's effect on dynamic characteristics of a curved ramp bridge in four different theoretical...
The purpose of this paper is to research the different influence on the subway station pit in construction, caused by the adjacent pit excavated before and after the station pit. The construction environment is divided into three types: a) no pits around the station; b) the pit around the station is constructed before it; c) the pit around the station will be constructed after it. By 3-D finite element...
This paper presents the progressive failure simulation of truss structures using the Finite Particle Method (FPM). Three major difficulties in structural collapse simulation, namely the description of dynamic behaviors of structures, geometric and material nonlinearity and fracture, are considered in collapse process. Different from the traditional finite element method generated from continuum mechanics...
Column and tie construction timber frame is a typical style of the traditional timber structure, whose column and beam are connected by using mortise and through tenon joint. To study the static performance of through tenons, we exemplify the typical three tenons found in the wooden dwelling in west of Hunan province in china. In this paper, we have did some mechanical analysis about how three types...
Superstructure will develop accessional internal force under nonuniform settlement of foundation. In this paper, the symmetric frame structure with symmetric nonuniform base settlement is studied. The simplified theoretical method of how to calculate the accessional internal force of this frame structure is deduced. In addition, taking one symmetric frame structure building with two spans and four...
Based on Dongting Hu three-tower cable-stayed bridge on high-speed railway, different cable measures to improve structural rigidity were studied by using finite element method (FEM). The results show that it's effective to adopt stiffening cables between towers to improve the rigidity of the bridge. The ratio of deflection to span (RODTS) with level stiffening cables is the smallest and the total...
Large air cooling fan system is made up of many fans. The dynamic response of the fan bridge truss is very complicated when the fans are running simultaneously. Four fans and their supporting structures are selected from the fan system as analysis object. By finite element method, vibration response produced by 15 kinds of the combinations of running of fans is analyzed. Result shows that interaction...
This article researched the object of 2,250R2 mill, made simulation analysis of roll system in condition of adjusting roll cross angle, rolling speed and intersection position of cross rolls, it is concluded that roll cross angle, rolling press quantity, intersection position and rolling speed can change the size of the axial force, axial forces may float small by the pressing ratio increases, larger...
Aiming at the problem of design size that of transmission line foundation under the current design and technical specifications in China is larger than the same level abroad. In this article, performance of UHV long span 9 piles square cap group foundation is simulated by ANSYS FEM (Finite Element Method) Program. By comparing the pile force situation, to achieve the bearing capacity of pile group...
In order to study the force distribution law in the slopes reinforced by pre-stressed anchor cables and frame beams, optimization safety factor calculation method of slopes after reinforcement, the load applied by anchor cables via frame beams is considered as line load on the slope, and we could obtain theoretical solution of additional stress in the slope by means of elastic theory. With parameter...
Single sided resistance spot welding (SSRSW) developed from RSW is a feasible plan to join vehicle structure to closed-form tube and is increasingly used in automobile manufacturing. Successful implementation of SSRSW to improve structural crashworthiness and reduce vehicle weight requires knowledge of issues related not only to joint performance but also processing requirements. In this study, effects...
Without any additional element, noncontinuous deformation of body can be simulated efficiently by interface element. The element stiffness matrix and interface stress are derived, which is based on the principle of virtual work. The steps given in the theoretical development were implemented in the computer program. A homogeneous cantilever beam and a composite structure were taken for examples to...
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...
A basic structure of excavator anti shovel device is introduced. The digging resistance force graph of the rotating bucket is drawn, and the calculation method of digging resistance is analyzed. Besides, the calculation diagram of the theoretical digging force of the bucket arm cylinder is given, the calculation method of theoretical digging force of the working hydraulic cylinder is deduced. Then,...
Osteoporotic patients occur frequently fragile fractures, and femoral fractures are the common traumatic injuries in the elderly. Although wires are often used through trials-and-errors for unstable femoral proximal fractures with DHS fixation clinically, there is no efficacy wire fixation technique available due to the lack of biomechanical study. FEM is applied to analyze the stress and strain distribution...
The structure optimization design of vehicle twist beam rear axle was conducted in this paper on the basis of topology optimization and HyperWorks software. The perfect material topology was found through optimizing defined designing space and the accuracy of optimization results was tested through K&C performance analysis so that rear axles with lighter weight but better performance can be designed...
During the operation of the bridge, various damages may occur and lead to the reduction of its bearing capability and durability inevitably. In order to detect the damage extent of the steel cable stayed bridge in Anqing, in this article, a numerical model was first conducted using ANSYS software to simulate the presented bridge, and then dynamic diagnose analysis on Anqing bridge was carried out...
It is of profound society significance and urgently realistic value to replace Houses on stilt of residential building with the timber structure. The effect and characteristics of such concrete structures were analyzed by the finite element software of ANSYS and the conceptual design was submitted for the control of the internal force distribution and the weak part of the structures. That is of greatly...
Based on the interval tunnels between Fenghuang Xincun and Sha Yuan metro stations in Guangzhou City, the construction effects of the overlapped tunnels are researched. 3D Finite Element Method is also adopted. The distribution of stratum deformation and crown raising displacement of the lower tunnel are analyzed. Axial force, moment and stress changing of the overlapped tunnels during the different...
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