Research On Optimization Of Boom Structure Design Of Forest Operation Platform

At present,China’s forestry equipment has single function,large volume and limited activity area.The forest operation platform studied in this paper,as a small forest vehicle,is small and flexible,adapts to the dense and complex working environment in the forest area,and can play an important role in forest protection,forest construction,orchard,artificial garden landscape and other agricultural and forestry construction.Boom is the main bearing part of forest operation platform,and its working performance is directly related to the stability and safety of operation.This paper studies the structure of telescopic arm and swing arm,which has the unique functions of clamping and luffing.During actual operation,the operation platform grabs materials through the clamping mechanism,including wood,wood,protective frame,guardrail,etc.,so as to realize the loading,unloading and handling of materials.Therefore,the research on the boom structure is a key point of the operation platform.The design and further structural optimization of the boom structure is of practical significance to improve the quality and develop a safe and practical operation platform.In this paper,the development of forestry machinery at home and abroad at the present stage is analyzed in detail.Based on the characteristic that there are few small forestry machinery in the market,the structure and size parameters of forest operation platform are preliminarily designed,and the three-dimensional model of boom is established by inventor;Using ANSYS Workbench for static analysis and structural optimization;Using MATLAB to optimize the hinge position;The results of dynamic simulation and hinge position optimization are verified by Adams.The main conclusions of this paper are as follows:(1)Using ANSYS Workbench software,the static analysis of two dangerous working conditions of boom is carried out,and the stress distribution position and maximum deformation under dangerous working conditions are obtained.According to the analysis results,the structural stiffness of the boom meets the design requirements,and the strength of some parts needs to be strengthened;(2)Optimize the working device of boom:carry out parametric design for the parts at the maximum stress position,and preliminarily determine the upper and lower limits of parameters.Then,the optimal value of section parameters is obtained by multi-objective driven optimization.On this basis,the plate thickness of the boom section is adjusted and the lightweight design of the boom is carried out.Through this optimization,the maximum stress of the working device of the forest operation platform is reduced by 22.06%,and the total mass is reduced by 10.26%;(3)Using ADAMS simulation software,the dynamic virtual prototype of the boom system of forest operation platform is established.The motion trajectory and cylinder displacement curve under two dangerous working conditions are obtained.In the post-processing module,the maximum stress value at the hinge points of the three oil cylinders is obtained;(4)Optimize the hinge position of the working device:analyze the force of the working device and establish the mathematical model of the optimal design;Using gads algorithm in MATLAB optimization toolbox to solve,the optimized hinge position coordinates are determined;The optimization results are verified in ADAMS.The results show that the optimization of the hinge position reduces the maximum force of the hinge point of the swing arm cylinder by 12.95%.