带偏挂小车的宽箱体起重机结构仿真及轻量化研究OA

Double-girder wide-box girder metallurgical cranes are characterized by substantial weight and considerable volume.The multi-functional double-girder wide-box girder cranes with underhung trolley are dedicated to the handling of steel coils and billets in the metallurgical industry.Now,the design and calculation of wide-box girder cranes,particularly those with underhung trolleys,remain reliant on empirical application and analogical transposition.The simplified simply-supported-girder model proves inadequate for accurately simulating the torsional effects induced by the underhung trolley and its attendant load,thereby yielding imprecise computational outcomes.In view of the above,a multi-operating-condition simulation of the crane was executed on the basis of the three-dimensional model and remote-load application,whereby the combined bending and torsional action imparted by the underhung trolley to the wide box girder was accurately reproduced.The main girder of the wide-box girder crane with underhung trolley was subsequently subjected to lightweight design,achieving a 10.54%mass reduction while preserving the requisite internal clearance.