摘要
针对车削加工过程中出现的刀具与工件之间的颤振,设计并研制了一种基于磁流变液挤压工作模式的减振车刀。为研究不同励磁电流下减振车刀的动态特性变化,通过类固体定义的方式在软件中定义磁流变液的参数,利用有限元仿真软件ANSYS Workbench对减振车刀进行了模态仿真分析;通过设计的瞬态激振实验方案对减振车刀进行了模态测试实验。仿真与实验得出减振车刀的前4阶模态值。结果表明,随着励磁电流的增大,各阶模态值均增大,对应的刚度值也增大。
Chatter occurred between the work-piece and tool during the turning process,a magne-to-rheological damping tool was designed and developed based on the MRF squeeze mode.To study the dynamic change of the damping characteristics for different excitation currents,the parameters of MRF in the software was defined through entity definition.The modal analysis of damping device was simulated with ANSYS Workbench.Also the transient excitation modal testing platform was built for the modal experiments.The first four modal data of the simulation and experiments were presented. Results show that with the increase of the excitation current,the modal values increase so as the stiff-ness values.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2015年第7期898-902,共5页
China Mechanical Engineering
关键词
减振器
磁流变液
颤振
模态分析
damper
magneto-rheological fluid（MRF）
chatter
modal analysis
