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Dynamic Simulation and Fatigue Life Analysis of Turnout Side Plate Deformation Device

Author: DaiChunXiang
Tutor: LinTengZuo
School: Chongqing University
Course: Mechanical Design and Theory
Keywords: Turnout Finite Element Method Rigid-flexible Coupling DynamicsSimulation Fatigue Life
CLC: U213.6
Type: Master's thesis
Year: 2012
Downloads: 33
Quote: 0
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Abstract


Because of advantages, such as simple configuration, light weight, low cost,reliable work, high loading capacity characteristic etc, turnout side plate deformationdevice of straddle flexible monorail has been widely used in monorail transit industry.Running condition of turnout side plate deformation device makes oriented plates andstable plates repeated transition, and cams bear alternating load, thus the fatigue lifeproblem of system’s components should be pay attention. Therefore, the research onmulti-body dynamic simulation and fatigue life analysis of turnout side platedeformation device have important theory significance and great engineering values onevaluated the work safety reliable of turnout device.With the multi-body system dynamic theory, fatigue life analysis method and finiteelement method, a rigid-flexible coupling dynamic simulation analysis of turnout sideplate deformation device have been carried out, and then the fatigue life of side plateand cams is analyzed. The main research work in this paper can be summarized asfollows:①The finite element models of flexible component of turnout side platedeformation device are established with UG and ANSYS software. With the method ofblock Lanczos, the natural frequency and normal mode of flexible components areobtained, and the modal neutral files of them are produced through the interfaceprogram generator of ANSYS and ADAMS.②Considering the thrust of electronic push rod and the centrifugal forcegenerated when train through, a rigid-flexible coupling dynamics model of turnout sideplate deformation device is built in ADAMS combined with the flexible body modalneutral file, and the time histories of loads of various components, as well as the stresscontours of side plates and cams are obtained through the dynamic simulation.③Because the forces on three groups of push rod obtained from the simulationfor origin device are very uneven, two modified structures of cams are proposed. Thenthe modified dynamic models of turnout side plate deformation device are establishedand analyzed, the simulation result shows that the forces on three groups of push rod aremuch evener than before.④In ANSYS, the static finite element model of side plate and the contact finiteelement model of cams are built, and the equivalent stress is calculated under the static load. Considering correctional S-N curves of components material, and combined thestatic analysis results with load spectrums simulated by ADAMS, the fatigue life of sideplate and cams is calculated by nominal stress method in FE-SAFE.

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Turnout
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