摘要
分析了传统模拟方法中温度边界条件的缺陷,提出了用耦合方法确定模具、熔体传热问题的边界条件。用有限元求解模具温度场、有限差分求解塑料熔体温度场,在界面上用超松弛方法更新边界温度,重新计算模具、塑件熔体的传热问题,直到收敛。保存脱模后模具温度状态并作为下一周期模拟的初始条件、边值条件。注塑成形中流动与冷却的耦合分析方法可以模拟瞬态、多周期及更复杂的传热问题。
This paper analysed the limitations of the conventional simulating method and presented a coupling scheme to determine the boundary conditions of thermal problems for mold and melt. The finite element method was employed to solve the mold thermal problem while the finite difference method was used to solve the melt thermal problem. The temperature at the interface between mold and melt was updated with the two solutions by over relax method. Repeating this process until the temperature was convergent. After ejection, the mold temperatures, inheriting from the last cycle, were saved and used as the initial and boundary conditions for next cycle simulation. The coupling method can simulate the transient, multi-cycle and more complicated thermal problems.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2006年第19期2002-2004,共3页
China Mechanical Engineering
基金
国家自然科学基金资助项目(10225211)
关键词
有限元法
有限差分法
注塑成形
耦合分析
finite element method
finite different method
injection molding
coupling analysis
