| 安晓卫,王承志,宋广胜.铸件凝固温度场有限元分析中界面热阻的处理[J].计算力学学报,2005,22(1):100~103 |
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| 铸件凝固温度场有限元分析中界面热阻的处理 |
| Disposal of interface thermal resistance in temperature field of casting solidification by finite element analysis |
| 修订日期：2003-04-18 |
| DOI：10.7511/jslx20051021 |
| 中文关键词: 有限元法 界面热阻 虚拟界面单元法 铸造凝固 热传导 |
| 英文关键词:FEA,thermal resistance on interface,fictitious interface method,casting solidification,heat transfer |
| 基金项目:兵总国防预研课题，军用发动机活塞铸造缺陷数值预测资助项目. |
| 安晓卫 王承志 宋广胜 |
| [1]沈阳理工大学机械工程分院,辽宁沈阳110168 [2]沈阳理工大学材料工程学院,辽宁沈阳110168 |
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| 中文摘要: |
| 提出一种处理铸件与铸型界面热阻问题的虚拟界面单元法，并给出了有限元计算公式。由于该公式不显含单元厚度(△l)，故该单元厚度△l可取任意值。当△l取为零时，使问题处理变得极为方便。针对某一具体金属型铝合金活塞的铸造凝固过程，按考虑和不考虑铸件与铸型间热阻影响两种方法作了有限元计算，通过与实测值相比较，本文提出的算法其计算精度远高于不考虑铸件与铸型间热阻影响的计算结果。另外．该方法使有限元建模方便、通用性强。 |
| 英文摘要: |
| In this paper a fictitious interface element method dealing with thermal resistance between casting and mold is presented, and the finite element formula is given. The contact surface between casting and mold is seen as interface element because the element thickness has nothing to do with the gap between them. The finite element analysis for the casting solidification of an alloy aluminium piston with metal mold has made in according to two ways with and without thermal resistance. The calculating accuracy using the above algorithm is much higher than that without thermal resistance. In addition to this, finite element mesh generation is easier and more general by using this method. |
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