Optimum Design for the Middle Wear Plate of Spherical Hinge Structure in the Rotating System of Swivel Bridge Construction
The performance of the spherical hinge structure,which is the core component in the rotating construction,determines the success or failure of the swivel process.Most related studies have simplified the spherical hinge,only considering the upper and lower spherical steel plates as a friction subset and ignoring the middle wear plates,so it is necessary to research the mechanical properties and the optimum design of the middle wear plates.Taking a T-framed rotating construction in Guiyang province as the engineering background,a refined finite element model of the spherical hinge is established and verified by Abaqus.Combined with the PSO,the proposition of optimizing the wear plate size parameters is constructed.In this one,the decision parameters include the spatial distribution and thickness of the plates,the optimization objective is the uniformity of contact surface frictional resistance distribution.Meanwhile,the secondary development of Abaqus by using Python is carried out to realize the automated process of FE solution and the spherical hinge optimization.The analysis shows that the pressure of the wear plate has a distribution pattern of"lower in the middle"and"higher at the edge",which is not conducive to making full use of the material properties and simplifying the engineering calculation.The maximum contact stress of the optimized spherical wear plate declines from 37.64 MPa to 25.57 MPa,the contact area has dropped by 50.5％,and the stress variance of the four wear plates is reduced from 4.47 to 0.85,which means the stress distribution at the contact interface is more uniform.This study can provide a theoretical basis and technical support for the optimum design of the spherical hinge contact interface.
spherical hinge designcontact interfacewear platesparticle swarm optimizationAbaqus secondary development
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