The Failure Cause Analysis Of Dump Truck Lifting Mechanism And Structure Optimization

This article is mainly aimed at some agricultural dump truck in the customer base ofthe lifting mechanism of fracture problem is studied, research object is a rod liftingmechanism of agricultural dump truck company in Guangxi, the base and the auxiliaryframe, using the ADAMS software to establish a simplified model of lifting mechanismand the uninstall process of lifting mechanism of the simulation, can draw stress valuechanging with time curve of different parts (especially the overload situation); UsingANSYS Workbench stress of key parts was analyzed and the auxiliary frame modalanalysis, then electric lifting mechanism base on test and auxiliary frame free modal test,verify the correctness of the software simulation and analysis. In this paper, using virtualprototype technology and finite element technology in the agricultural dump truck designhas made some attempt and exploration, has a certain academic value. Mainly do thefollowing:(1) According to the characteristics of the lifting mechanism of dump truck,combined with the virtual prototype technology, using ADAMS software to establish thesimplified model of lifting mechanism of dump truck cabin, tie rod, cylinder, oil cylinderpiston rod, etc., to see the layout of the whole organization, test interference situation andcarries on the kinematics simulation, not only can get the initial visual design for eachcomponent of the force, also can calculate initial lifting performance throughout theorganization.(2) Using finite element analysis software ANSYS Workbench for key components(base), the lifting mechanism and the auxiliary frame parameterized modeling, meshing,ADAMS simulation is added in the finite element model of the lift and at this point ofview, carries on the finite element analysis for the base stress nephogram. Using finiteelement software of auxiliary frame and the base for the free modal analysis, and theauxiliary frame first six order non-zero free mode natural frequency and vibration shapefigure, by calculating the frequency values of known auxiliary frame and base frequencyto avoid the frequency of the engine, normal working is safe.(3) Based on modal analysis of ANSYS Workbench and ADAMS simulationanalysis results, the auxiliary frame decorate the position of test point, then the modaltest, get the auxiliary frame test modal frequency and vibration shape figure, contrast testdata and software analysis, software to verify the results of the reliability and accuracy ofthe model. Arrangement the test point of lifting mechanism of tipper, to unload the lifting mechanism for dynamic test, to verify the mechanical lifting mechanism base andsoftware basic is consistent with the results of the analysis, fracture analysis of liftingmechanism base for the next step to lay the foundation.(4) Using the ADAMS software to establish the parameterized model of liftingmechanism, the lifting mechanism parameterized each hinge point coordinates, and selectthe appropriate design variables and objective function is optimized, the optimizeduninstall the1.5x104Kg load oil cylinder lifting mechanism of the maximum lifting1.89E5(N), the initial oil cylinder lifting force1.55E5(N),P0equals0.82Pmax，less than0.85Pmax，conform to the requirements of the organization performance, the maximumlifting force was decreased32.5Percentages,the optimized model is established inANSYS Workbench software, the stress analysis verify the optimization structure isconform to the requirements optimization...