摘要
目的通过对某异型石材数控加工中心雕铣用陶瓷球轴承电主轴的动态特性的研究,验证电主轴结构设计的合理性。方法直接在ANSYS中建立陶瓷球轴承-主轴系统三维有限元模型,采用Subspace模态提取法对其进行模态分析,计算主轴前6阶固有频率、振型和临界转速,并利用DZ-2振动测量仪对该主轴进行振动响应试验。结果,无论是ANSYS的模态分析法得出的固有频率还是振动响应试验得出的极限频率,主轴的最高工作转速都低于其一阶临界转速,能有效避开共振区。结论对比振动响应试验结果与ANSYS仿真结果,该有限元分析模型的建立过程所做的简化处理是正确的,主轴的结构设计也是合理的。
Purpose it analyzes the dynamic characteristic of motorized spindle of ceramic ball bearing used in milling by one irregular shaped stone CNC machining center, which result verifies the rationality of the design structure of the motorized spindle. Solution A 3D FEM system is built directly in ANSYS, which modal is analyzed by adopting Subspace modal extraction,and then the first six sets natural frequency,vibration mode and critical rotating speed is calculated^In addition the vibration response test for the spindle is carried out by using vibration measuring instrumenLBesults Both natural frequency resulted from modal analysis method of ANSYS and limit frequency resulted from vibration test indicates that the designed maxworking speed of this spindle is less than its critical rotating speed. which can avoid the resonance region effectively. Conclusion Comparing the two results of ANSYS simulation and vibration response test,the simplified processingfor the establishment of finite element model is proven to be correct and the structure design of the spindle is rational.
出处
《机械设计与制造》
北大核心
2011年第12期219-221,共3页
Machinery Design & Manufacture
基金
国家"十一五"科技支撑计划(2006BAJ09B07)
辽宁省教育厅创新团队(2007T146)
关键词
电主轴
ANSYS
模态分析
临界转速
振动响应
Motorized spindle
ANSYS
Modal analysis
Critical rotate speed
Vibration response
