基于联合仿真的挖掘机斗齿正交试验优化

Optimization on orthogonal test of bucket tooth for excavator based on joint simulation

为了提升挖掘机作业效率与油耗指标,提出基于联合仿真的挖掘机斗齿正交试验优化技术。通过开展料性测试搭建了现实土壤的离散元模型,同时搭建挖掘机的动力学模型,并基于多体动力学-离散元联合仿真技术实现了对挖掘机挖掘过程的准确模拟。据此提出基于正交试验的斗齿优化方法,并借助正交试验对斗齿进行了优化,同时在国内工程机械领域首次使用金属3D打印技术制作优化后的斗齿并进行了装机实测,结果显示,优化后的斗齿实现了挖掘机作业效率与油耗指标的提升。

In order to improve the efficiency and fuel consumption indexes of excavators,an orthogonal test optimization technology of the bucket tooth for the excavator based on joint simulation was proposed.By conducting the material property test,a discrete element model of real soil was built,while a dynamic model of the excavator was built as well.Based on the joint simulation of multi-body dynamics and discrete element,the accurate simulation of the excavation process for the excavator was achieved.Then a bucket tooth optimization method based on orthogonal test was proposed,and the bucket tooth were optimized by using the orthogonal test.At the same time,for the first time in the field of domestic engineering machinery,the metal 3D printing technology was used to produce the optimized bucket tooth and then the optimized bucket tooth was installed for actual testing.The result showed that the optimized bucket tooth achieved an improvement in the efficiency and fuel consumption indexes of excavators.