| 水轮机下环铸件凝固过程热应力模拟分析 |
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| 引用本文： | 刘小刚,康进武,罗通国,杨小兵,王长建,程建国,黄天佑,柳百成. 水轮机下环铸件凝固过程热应力模拟分析[J]. 铸造技术, 2006, 27(9): 984-987 |
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| 作者姓名： | 刘小刚 康进武 罗通国 杨小兵 王长建 程建国 黄天佑 柳百成 |
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| 作者单位： | 1. 清华大学机械工程系,教育部先进材料成形制造重点实验室,北京,100084
2. 中国二重集团公司铸造分厂,四川,德阳,618000 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 采用数值模拟方法对水轮机下环铸件凝固过程中的应力场进行了模拟和分析。模拟中采用接触单元法处理铸件与砂芯之间力的作用,改进了传统的铸件/铸型边界条件处理方法。文中重点分析了下环凝固过程中准固相区的受力情况,根据准固相区受力特点建立了适当的热裂判据,对下环凝固过程热裂倾向性进行预测。实际生产结果与预测结果相符合。
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| 关 键 词： | 下环 热裂 热应力 数值模拟 接触单元 |
| 文章编号： | 1000-8365(2006)09-0984-04 |
| 收稿时间： | 2006-05-08 |
| 修稿时间： | 2006-06-22 |
Thermal Stress Analysis of the Solidification Process of Francis Turbine Band Casting |
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| LIU Xiao-gang,KANG Jin-wu,LUO Tong-guo,YANG Xiao-bing,WANG Chang-jian,CHENG Jian-guo,HUANG Tian-you,LIU Bai-cheng. Thermal Stress Analysis of the Solidification Process of Francis Turbine Band Casting[J]. Foundry Technology, 2006, 27(9): 984-987 |
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| Authors: | LIU Xiao-gang KANG Jin-wu LUO Tong-guo YANG Xiao-bing WANG Chang-jian CHENG Jian-guo HUANG Tian-you LIU Bai-cheng |
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| Affiliation: | 1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; 2. CHINA ERZHONG Co. ,Ltd. Deyang 618000,China |
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| Abstract: | Thermal stress field during the solidification process of the Francis turbine band casting has been simulated by numerical simulation method.The interaction between the casting and core was treated with contact element method in numerical simulation,thus improve traditional method for studying casting/model boundary conditions.The stress status of semi-solid phase area was emphasized.The hot tearing criterion was established to predict the tendency of occurrence of hot tearing of the casting.The simulated results are in accordance with the practical cases approximately. |
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| Keywords: | Francis turbine band Hot tearing Numerical simulation Contact element |
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