A Study Of Structure Analysis And Optimizition Design For The Telescopic Boom Of The Truck Crane

With the continuous development of domestic infrastructure construction, operationaland flexible truck crane in the proportion in the engineering field is persistent rising.Due tothe fierce competition in the industry, truck crane lifting performance, bearing capacity andsafety requirements are improved gradually. Structure of crane arms as the main bearingcomponent, the strength and stiffness directly affect the machine performance.So analysingstrength and stiffness of teleceopic arms and the optimization design of structure has practialsignificance.The research object of this paper is Telescopic arms of the QAY50crane.Firstly, makingnecessary mechanics analysis of the structure of telescopic arms in combination with Cranedesign specification and related mechanical knowledge. Then, according to the request ofactual project, we chose three typical conditions through analysing the actual workingconditions of crane. Based on it, we chose to use the powerful finite element analysissoftware ANSYS to establish parametric finite element model of entire arms and do someanalysis, like finite element for static analysis, modal analysis and optimal design.Throughstatic calculation and analysis of the telescopic arm, we can get the the overall deformationnad stress cloud of the structure, which point out the location of maximum deformation andmaximum stress,verify the safty of the structure and the necessity of optimal design.Throughmodal analysis of the structure of the telescopic arm, we can get the first six naturalfrequencies and mode shapes accordingly in three different conditions, know the influence ofcrane load to crane dynamic stiffness in different frequencies, which clarify the defects ofstructural and the site needed strengthen.Finally, we use optimal module ANSYS for parametric modeling of telescopic arms,select the cross-section size and thickness of telescopic arms as design variables, themaximum allowable stress and deflection as constraints, while the volume of the telescopicarms is selected as the objective function, optimize the design for the telescopic arms. The study in this paper provides important theoretical basis and referrible value forsolving similar product design and engineering problems by finite element analysis andoptimal design of telescopic arms.