Improvement And Field Test Research On The Lowering Structure Of An All-terrain Crane

In recent years,China has made many engineering constructive breakthroughs.Against the background of these brilliant achievements,the demand for large-scale engineering equipment is also increasing year by year.As a commonly used construction machinery,allterrain cranes combine the advantages of traditional truck cranes and rough terrain cranes,which can not only achieve rapid transitions but also operate under harsh working conditions.However,all-terrain cranes will continue to develop in the direction of high-end technology,so we still need to constantly analyze and research all-terrain cranes.The research content of this paper is to establish a finite element model for the lowering structure of an all-terrain crane,to focus on analyzing the side deflection problem of the boom faced by an all-terrain crane,and to conduct a static analysis of an all-terrain crane to check its side deflection.The amount and whether there is excessive stress,carry out structural improvement,and finally conduct on-site testing.By analyzing to provide reference opinions and data for all-terrain crane design manufacturers,make the design safer and more reliable,avoiding dangerous accidents.This article firstly presents the current research status of all-terrain cranes at home and abroad and the development trend of all-terrain cranes,and explains the importance of the allterrain crane lowering structure on the stability of the whole vehicle structure.Next,each component of the all-terrain crane is introduced,and the influence of the vehicle model on the whole vehicle model is analyzed by using the fishbone diagram.An overview of the finite element method is given,and the cell types used for the later modeling are selected.Then,the finite element model of the all-terrain crane alighting model is established,including the independent finite element modeling of each component,the material properties of each component are set,the connection relationship is explained,and the overall assembly of the finite element model is carried out.Adjusted with mass and imposed boundary conditions on the finite element model.Calculation and analysis of the cornering phenomenon of all-terrain cranes are carried out,including the selection of the boom cornering calculation model and the selection of the boom cornering control index,and the analytical formula of the cornering phenomenon is deduced and verified by an example.The static finite element analysis of the all-terrain crane is carried out,and the structure of the lowering structure is improved.The finite element model after the structural improvement is smaller in each working condition,which effectively reduces the risk of cornering accidents.Finally,a field test is carried out on the side deflection problem,and the side deflection amount obtained by the field test is compared with the side deflection amount obtained by the finite element calculation result,and it is also verified whether the established finite element model of the all-terrain crane getting off is accurate or not.whether there is a big difference with the actual model,and whether the previous calculation method is correct.