桥式起重机结构设计及有限元分析+CAD图纸
关键词：单梁桥式起重机，桥架结构设计，有限元分析，模态分析
AbstractIn recent years, due to the widespread use of the computer, crane design has improved fromthe traditional mechanical calculation methods to using computers to finish the modular designof cranes.In the past, designers often use classical mechanics method to design and manuallycalculate when structural analysis. The analysis of complex structures using too muchassumptions and simplifications, which is difficult to ensure the accuracy of calculatedresult.This planted a lot of hidden dangers when we using the crane.With the development ofmachinery manufacturing intelligent technology, overhead crane must change the traditionaldesign methods to seek new progress.In this paper, during overhead crane designing I combined the traditional mechanicaldesign methods with the advanced science technology . First, the use of mechanical methods todetermine the initial size of each part of the structure of the crane and verification.Underpremise of the safety requirements, the construction of three-dimensional models. First draw inthe modeling software PRO / E in a solid model for this single-girder bridge crane girders andend of the beam to determine the thickness, length and a series of parameters, and then theinpidual components are assembled to give a three-dimensional model of the machine. Thethree-dimensional model of the bridge crane into ANSYS, the use of software modules for staticbridge crane beam finite element analysis under extreme load conditions, intuitive draw thestress distribution and deformation of the bridge and find the weak bridge structure points to theoverall design improvements.The results show that the maximum stress occurs at the junction ofthe main beam and the end of the beam.The maximum stress is 173MPa less than the allowablestress 200MPa meet the requirements.The maximum deformation appearing central to the mainbeam is 29mm which meeting the stiffness requirements.Finally, make a modal analysis for thesingle girder crane , getting the natural frequencies and vibration loads at different locations toverify the stability and reliability of the single girder overhead crane in the actual work.KeyWords:Bridge crane,The design of ridge construction,Finite element analysis,Modal Analysis