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To investigate the full-range characteristic on nonlinear aerostatic of long span cable-stayed bridge. taking a cable-stayed bridge under construction for example, the realization process of inner and outer incremental double iteration method to solve the aerostatic stability and the full-range physical characteristics of instability are described in detail. Analysis result shows that the critical...
A model of monolithic roadbed track system was established based on the finite element method (FEM). Modal and harmonic response analysis are carried out. Vibration features and dynamic response of the system are analyzed. The effect of different parameters, including rail fastenings, sleepers and elastic pads, on the riding comfort and the transmission rate of the track system is calculated. The...
Aiming at seismic response of a five-span continuous curved rigid-framed bridges under excitation of traveling waves, the dynamic calculating model of the continuous curved rigid-framed bridge is created by the finite element analysis program ANSYS. The dynamic characteristic of the continuous curved rigid-framed bridge is discussed, and a time history analysis is conducted for the continuous curved...
Stiffness is one of the most important factors to vibration isolation system. Paper established a finite element model of the air spring, used nonlinear finite element method to analysis the rectangular shape air spring's stiffness. By considering the nonlinearity of the rubber-cord composite material, the geometric nonlinear process caused by large deformation and the nonlinear contact between the...
After establishing the vehicle-track finite element model, the system vibration characteristic is analysised. With the method of modal and harmonic response analysis, the effects on the riding comfort and foundation reaction of different steel spring stiffness and damping were studied. The sperling index reflects the riding comfort. At the same time, the foundation reaction and the force transmission...
Each busbar conductor of a phase is subjected to a force due to the short-circuit currents. In this paper, the electromagnetic forces affected by the short-circuit current in three-phase busbar conductor are calculated in vertical and horizontal arrangement. The short-circuit current densities are calculated mathematically. The calculations are performed by assuming a peak value of steady-state ac...
In this paper a new approach of a shape-optimized piezoelectric MEMS generator for fluid-actuated energy scavenging is presented. Different energy scavenging scenarios are introduced. Depending on the specific load scenario optimum piezoelectric cantilever shapes are investigated. A point load at the free-end of a cantilever requires a triangular cantilever shape. Compared to a classical rectangular...
The deformation of the workpiece-fixture system has essential influence on the locating accuracy of the workpiece. To minimize the overall deformation of the workpiece-fixture system is an important issue in fixture design. This paper focuses on the fixture layout design with compliant model. A topology optimization approach is presented in order to reduce the complexity introduced by the high computational...
Recently, colonoscopy has become much more important with increasing number of colonic diseases. However, the inspection time depends on the doctor's skill strongly.
Grasping a deformable object instantaneously requires maintaining equilibrium of its pre- and post-deformed shapes using the same set of forces. This paper studies the type of grasps generated by squeezing a planar object with two fingers. It is shown that the success of such a grasp is independent of the applied forces in the case of small deformation. Numerical algorithms are introduced to compute...
Dynamic modeling and optimal design of a 3-DOF parallel robot with flexible links for high-speed pick-and-place operation is presented in this paper. The dynamic model is formulated using substructure displacement method. Meanwhile, the exactitude of the model is verified through the software ANSYS. A novel index, which is represented by the ratio of the sum of power consumption to the total movable...
Over the past several decades, the control of electric machines has typically been viewed using a “black box” approach which typically involves the manipulation of voltage and current to generate desired characteristics. However, for the purpose of designing and controlling the permanent magnet synchronous motor (PMSM) efficiently, a thorough understanding of the magnetic field parameters can play...
Acoustic transducers with large radiation surface are commonly used in non-contact levitation and transportation systems. Traditional modeling can not predict its dynamic performance precisely. There is not enough documented information on design and optimization. A coupled 3D model has been built in this work. Modal and harmonic analysis has been performed to investigate mechanical and electrical...
Under special domestic conditions in yunnan province of complicated geological formation, different climatic conditions as well as uneven topography and relief, hand made excavation for cast in-situ piling, using on a large scale primary finite element software ADINA, a detailed research on the factors influencing the working mechanism, pile cap subsidence and end resistance is done. Load versus displacement...
This paper analyzes a single axial permanent bearing and two kinds of symmetrical-mounted axial permanent bearings by ANSYS solving method of magnetic field. The effect of axial dimension and air gap length between two magnetic rings on axial restoring force and stiffness of bearings is calculated, which provides the foundation for further designing and guiding suggestion for application of permanent...
ANSYS software used to establish the finite element model of the corrective maintenance tower by considering different wind directions and comparing the wind influence on the node displacement, chord axial force, cross arm axial force, and the chord bearing counter force to study the wind direction influences on the mechanical properties of maintenance tower, so as to provide reference for a more...
This paper presents a novel constructive three-phase six-slotted permanent magnet linear synchronous motor (PMLSM) based on the approach of combinational iron-cored primary. In order to develop a small scale, large thrust and high thrust performance slotted PMLSM, a construct of separated three two-slotted armature iron-cores for each phase winding is proposed. The influence of couple between iron-cores...
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