挖掘机式冲击器工作装置固液耦合模态分析  

Fluid-solid coupling modal analysis on working device of excavator typed impactor

作　　者：钟飞[1] 史青录[1] 陈艳[1] 白鹏伟[1] 吴正明[1] 

机构地区：[1]太原科技大学机械工程学院,山西太原030024

出　　处：《矿山机械》2013年第6期37-41,共5页Mining & Processing Equipment

摘　　要：为了探究液压油对挖掘机式冲击器工作装置振动特性的影响,建立了某30t挖掘机式冲击器的三维模型,并通过调节各组液压缸活塞杆的长度,获得了工作装置的典型工况姿态。将模型导入ANSYS Workbench中建立有限元模型,在各组液压缸中填充液体,并用命令流定义液体的属性和耦合面。对模型进行固液耦合模态分析,获得了工作装置的频率和振型,并与无液体填充模型的模态分析结果进行对比分析,为了解和优化固液耦合下挖掘机式冲击器工作装置的动态特性提供了依据。In order to explore the effects of hydraulic oil on vibration characteristics of the working device of the excavator typed impactor, the 3D model of a certain 30 t excavator typed impactor was built, and the length of the piston rod in each hydraulic cylinder was altered to acquire the typical working posture of the working device. And then, the model was imported into ANSYS Workbench to establish the finite element model. Each hydraulic cylinder was filled with liquid, and command flow was applied to define the liquid attribution and the coupling interface. The fluid-solid coupling modal analysis of the model was conducted, and the frequencies and the vibration shapes of the working device were obtained, which was contrasted with the modal analysis results of the model without fluid filling. The study offered references for understanding and improving the dynamic characteristics of the working device of the excavator typed impactor in fluid-solid coupling mode.

关 键 词：挖掘机式冲击器 工作装置 ANSYS WORKBENCH 固液耦合 模态分析 

分 类 号：TU621[建筑科学—建筑技术科学]