Analysis And Optimization Design On Jib System Of All-terrain Crane For Lifting Wind Power

All-terrain cranes play important roles in the lifting of wind power with their rapid transfer,long distance travel and the characteristics of the operation in the harsh fields.All-terrain cranes occupy the market about wind power lifting quickly.The crane manufacturers take into account the lifting height,load and lateral dimensions are relatively large in the process of wind power lifting,all-terrain crane of wind power lifting is adopted wind power lifting boom which is installed at the head of the original boom in order to solve the interference problem between boom and wind power equipment.Considering the condition that the terrible stress and the wind load from working environment of the wind power lifting boom of all-terrain crane,the analysis and design of wind power lifting boom structure is finished to getting the structure's parameters.Through establishing the model of all-terrain's overall boom combine with the actual situation in the process of lifting,a study on linear analysis,nonlinear analysis design,modal analysis and optimizing design of the boom,it is very important to improve the safety performance of all-crane.Main contents of this paper are as follows:(1)The boom of all-terrain crane is the main loading structure in the process of wind power lifting.It is significantly important to design reasonably.According to the general requirements and crane design specification of wind power lifting boom combined with the actual loads in the operation process of wind power lifting put forward the scheme research on wind power lifting boom.Software is used to design and build the model of boom in order to complete the finite element modeling for boom of all-terrain crane.(2)The boom of all-terrain crane belongs to the slender towering structure which bottom is hinged support,the head is pulled by the super lift device and the working radius are changed by the luffing cylinder.Therefore,It's necessary for wind power lifting boom to analyze and design accurately in order to ensure the safety and reliability of operation process.This research is based on finite element modeling and analyze,getting the nephogram of statics,nonlinear large deformation,dynamic analysis and the vibration model of boom structure.The location of the maximum stress and strain is observed,the modal analysis results are taken as the basis to avoid the resonance of the structure,these analyses can be used to rationalize the boom design.(3)On the basis of the finite element analysis results of each step,the section size of the boom structure and the selection of the standard steel are optimized by the optimization module of the relevant software.On the basis of parametric modeling and the crane design specification,the criteria constraints,the optimization model and optimization method are defined to used to optimize the boom structure.Repeating optimization process and comparing analysis data before and after optimization judge the rationality of each optimization design,the parameter optimization is finished and the optimization scheme is output when the satisfaction of the project is completed.The optimization design is helpful to reduce the redundant quality of the boom structure.It is not noly to reduce the cost of crane manufacture but also to improve the safety of all-terrain crane.