摘要
在分析龙门式加工中心C轴系统内部热源的种类、传热途径以及确定边界条件的基础上,建立了瞬态传热学模型和有限元模型,并推导出节点温度的矩阵方程.用有限元法计算了三维瞬态温度场分布,得出系统达到热平衡所需的时间约 1 8h,同时计算了各部件达到热平衡时的温度场分布和温升,最高温度发生在热源处,最高温升为 22 402℃,这些为散热结构优化设计提供了理论依据.
Based on analyzing the internal heat sources, transmission ways and ensuring boundary conditions of C-spindle system of gantry machining center, the transient-state heat transfer model and finite element model are established, meanwhile the matrix equation of the temperature of the nodes is educed. The three-dimensional transient temperature field is calculated using finite element method (FEM). The result indicates that the system takes 1.8 h to reach its thermal balance and the temperature distribution and temperature-rise of each part are also calculated. The tiptop temperature occurs at the heat sources and the maximal temperature-rise is 22.402°C. These results present a theory foundation for optimal design of releasing heat structure.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第2期235-238,共4页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目 (50375026)
江苏省"十五"科技攻关资助项目(BE2003035)
关键词
加工中心
C轴系统
有限元法
瞬态温度场
Computer simulation
Finite element method
Heat transfer
Mathematical models
Partial differential equations
Temperature distribution
Three dimensional
