Structural Optimization Design and Analysis of Mining Truck Frame Based on Strain Test
The hydraulic lifting mechanism is adopted for the articulated mining truck to realize the unloading of goods.The stress condition is complex,which has a great impact on the frame structure and high requirements.The load characteristics of the rear frame and container of a dump truck under different operating conditions were analyzed,and the load conditions and bound-ary conditions under various working conditions were obtained.According to the above analysis,the finite element analysis model of the rear frame and container was established,and several typical working conditions were selected for analysis to obtain the dis-tribution of stress and strain.Through the use of material upgrading,fillet optimization and welding process improvement,the op-timization design was carried out for the stress concentration and large position,so as to reduce the stress value and ensure that the safety margin meets the requirements.Based on the right angle strain test method,the stress test was carried out for the actual dump truck frame,the strain gauge was arranged at the key position of the analysis,and the typical working conditions were se-lected for the test,and compared with the simulation results.The results show that:the stress at the hinge joint of dump truck and the gooseneck support of hydraulic lifting cylinder is large,and the stress concentration appears,but they are all within the allow-able range.The stress distribution is effectively improved and the maximum value is significantly reduced by means of thickness in-crease,diameter increase and welding process increase.According to the real vehicle test and simulation analysis,the stress distri-bution under full load condition is basically the same,and the maximum error is less than 5.8%.The results after optimization are significantly lower than those before optimization.The results show the reliability of the analysis model and optimization method,and provide a reference for such analysis and design.
Articulated VehicleFrameFull Load ConditionFinite Element ModelStrain TestStructure
NETL
NSTL
万方数据
维普
