摘要
为获得装载机工作装置载荷谱测点位置,全面评估工作装置的结构强度与疲劳强度。建立铲斗受力模型,利用六面体单元和接触单元对工作装置整体结构进行有限元建模,采用典型工况法对工作装置结构强度进行仿真和试验研究,结果表明仿真值与实测值基本吻合,两者误差在1.6%~7.3%之间,从而有效地确定了载荷测点位置区域。采用Goodman疲劳极限线图法对工作装置结构测点位置的疲劳强度进行评估,试验测点的应力仿真值和试验值都在Goodman曲线范围以内,表明结构满足疲劳强度要求。将静强度校核与疲劳强度评估相互结合,获得了一种较为完整的结构强度分析方法。结构强度分析与试验结果为装载机工作装置载荷谱测试与疲劳寿命分析提供依据。
In order to obtain the positions of load spectrum measuring points of the loader working device,the structural strength and fatigue strength of the working device were evaluated. The bucket force model was set up and the working device finite element model was builted. The method with typical operating conditions was used in simulation and experimental research on the structure strength analysis. The results showed that the simulation results agree well with the measured values,and the error of them between the 1. 6% ~ 7. 3%,so as to effectively determine the load measuring point location area. Goodman fatigue limit diagram method was used to evaluate the fatigue strength of the measuring point. The results showed that the structure satisfied the requirements of fatigue strength. The static strength and fatigue strength evaluation were combined to obtain a more complete structural strength analysis method. Structural strength analysis and test results provide bases for the load spectrum test and fatigue life analysis of the loader working device.
出处
《机械强度》
CAS
CSCD
北大核心
2016年第4期772-776,共5页
Journal of Mechanical Strength
基金
国家科技支撑计划项目(2015BAF07B02)
中央高校基本科研业务费专项资金项目(310825163407
310825161005)资助~~
关键词
装载机
工作装置
结构强度
疲劳强度
Loader
Working device
Structural strength
Fatigue strength
