关键词: 液压挖掘机, 挖掘阻力, 仿真, LS-DYNA软件, 挖掘轨迹

Abstract: Aiming at the difficulty of directly obtaining the load spectrum of excavation resistance through experimental testing,presents a method to obtain the load spectrum of excavation resistance through dynamic simulation.Firstly,the bucket-soil model is established in LS-PREPOST.Then select 3 representative excavation trajectories as the trajectory of the bucket model.Finally,the simulation of bucket digging soil is carried out,the load history of the bucket and three sets of cylinder thrust are obtained.According to the comparison between the calculated results and the measured data from a 36 t backhoe hydraulic excavator,the bucket-soil model is continuously improved,and the more accurate excavation resistance is obtained.The feasibility of the simulation method is verified.

Key words: hydraulic excavator, excavation resistance, simulation, LS-DYNA software, excavation trajectory