基于有限元分析的液压挖掘机回转装置系统动力学研究
Research on Dynamics of Hydraulic Excavator's Rotating Device System Based on Finite Element Analysis

首先分析了基于有限元模态分析和冲击载荷作用动力学响应的动力学理论基础。以液压挖掘机回转装置系统为研究对象,利用动力学理论和有限元分析相结合的方法对液压挖掘机回转装置进行动力学分析。建立了液压挖掘机回转装置系统动力学模型,利用有限元装配和单元连接技术建立回转装置转台-回转支撑-回转机构耦合的有限元模型,对有限元模型进行模态分析,对回转装置系统的抗冲击动力学性能进行评定,采用模态加速度法对回转装置有限元模型进行冲击载荷作用动力学响应分析。研究结果为液压挖掘机回转装置系统结构动力学及抗冲击性能研究提供依据。
Firstly, the dynamics theoretical basis is reviewed based on the finite element modal analysis technique and the impact dynamic response. Taking the rotating device system of hydraulic excavator as study subject, we research dynamics analysis of hydraulic excavator's rotating device by combining the dynamics theory with the finite element analysis. The dynamics model of rotating device system is established, and the coupled finite element model of rotating device turntable-rotary support frame-rotating mechanism is established, the modal analysis is conducted based on the finite element model,the shock-resistant dynamic performance was assessed for rotating device system, the impact dynamic response was analyzed with the modal acceleration method. A theoretical basis from the study results is provided for the study of structural dynamics and anti-shock performance of hydraulic excavator's rotating device system