Multi-method Step-by-step Optimization Of Bridge Crane Structure And Software System Implementation

With the continuous expansion of the scale of the bridge crane market,this can be seen everywhere in many production workshops,warehouses and other places.So as to cope with the more and more competitive market,the lightweight optimization design of the bridge crane which was designed based on the traditional design formula has become one of the most effective methods to reduce manufacturing costs for now.The weight of the bridge structure of the bridge crane is the largest,while the mass of the main girder is the largest in the crane structure.Therefore,the lightweight problem of the bridge crane is converted into reducing the mass of the main girder.However,in the previous optimization studies,most of them only focused on the optimization of section size of main girder,and after optimization,the obtained results still left a large margin of safety.Therefore,in light of the above questions,The various methods were adopted to carry out the lightweight optimization research on the main beam structure of the overhead crane step by step.This article presents a parameterized modeling of the box girder structure of bridge cranes.The influence of various dimensions of the box section on the stress,deformation,and dead weight of the main girder is studied through parameter correlation.The direct optimization method and response surface analysis method are used to optimize the lightweight design of the main girder,and the optimization results are compared with those of genetic algorithm,The optimal box section size and the best method among these methods are preliminarily obtained.The longitudinal stiffeners of the optimized box girder of a bridge crane were further optimized using the direct optimization method.According to the size,quantity and layout of the longitudinal equilateral angle steel,four optimization schemes are discussed and studied,and the topology optimization of the transverse bulkhead of the main girder of the bridge crane is taken according to the eight operating modes of the fully loaded main trolley,Thus,the mass of the main girder is further decreased based on the above optimization results.In order to solve the problems of large structural stress and reduced service life of the main girder of the bridge crane obtained by the above method,The direct optimization method is also taken to improve the size of the equal section of the bridge crane with multipurpose optimal method,so as to reduce the maximum stress and dead weight of the main beam in a small way on the premise of greatly improving the service life.Then 3D software is used to model the optimized bridge structure of the bridge crane,and the statics,modal and eigenvalue buckling of the bridge crane are solved by finite element method to verify its performance,which can also visually verify the feasibility of the optimization method.Finally,in order to avoid repetitive modeling work and quickly analyze and verify the performance of the bridge structure of the designed bridge crane,the software interface was designed using Python language and Py Qt5,and the performance analysis of the bridge structure of the bridge crane based on finite element parameterization design language was redeveloped,This enables the self-designed visualization software system to quickly analyze the structural performance of bridge cranes.