| 基于相似理论解决水轮机转轮数值分析困难的方法 |
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| 引用本文： | 姬书得,张利国,刘雪松,方洪渊,于东媛. 基于相似理论解决水轮机转轮数值分析困难的方法[J]. 机械工程学报, 2010, 46(8). DOI: 10.3901/JME.2010.08.083 |
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| 作者姓名： | 姬书得 张利国 刘雪松 方洪渊 于东媛 |
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| 作者单位： | 1. 沈阳航空工业学院航空制造工艺数字化国防重点学科实验室,沈阳,110034
2. 哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨,150001 |
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| 摘 要： | 为解决水轮机转轮在数值模拟过程中存在单元数量大、增量步多的困难,以相似理论为基础,提出基于温度场完全相似的虚拟模拟件的概念,同时结合利用热传导理论得到的表征模拟件与实际结构之间焊接残余应力差异的应力修正系数,推导出模拟件与实际结构之间焊接残余应力的对应关系。对尺寸比例系数是1.5:1的转轮实体与模拟件的焊接残余应力场进行数值分析。结果表明,转轮模拟件沿叶片出水边上的焊接残余应力分布规律与转轮实体基本相同,且转轮实体与模拟件在叶片出水边的焊缝附近对应位置的残余应力比值与基于相似理论得到的转轮实体与模拟件的焊接残余应力比值的误差在10%以内。这充分说明基于相似理论建立的转轮模拟件可以代替转轮实体进行数值分析,从而解决了转轮实体在模拟过程中存在的问题。
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| 关 键 词： | 相似理论 转轮 模拟件 焊接残余应力 |
Solution for Difficulties in Simulation Analysis of Turbine Runner Based on Similarity Theory |
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| JI Shude,ZHANG Liguo,LIU Xuesong,FANG Hongyuan,YU Dongyuan. Solution for Difficulties in Simulation Analysis of Turbine Runner Based on Similarity Theory[J]. Chinese Journal of Mechanical Engineering, 2010, 46(8). DOI: 10.3901/JME.2010.08.083 |
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| Authors: | JI Shude ZHANG Liguo LIU Xuesong FANG Hongyuan YU Dongyuan |
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| Affiliation: | 1.Aeronautical Manufacturing Process Digitization Key Lab of Fundamental Science for National Defense/a>;Shenyang Institute of Aeronautical Engineering/a>;Shenyang 110034/a>;2.State Key Laboratory of Advanced Welding Production Technology/a>;Harbin Institute of Technology/a>;Harbin 150001 |
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| Abstract: | In order to solve the difficulties with large number of elements and increments in the process of turbine runner simulation,the corresponding relation of welding residual stress between practical component and simulative component is established on the basis of similarity theory,the conception of virtual simulative component and the auxiliary value of welding residual stress deduced on the basis of welding conduction theory.The simulation analysis is done between the practical runner and the runner's simula... |
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| Keywords: | Similarity theory Runner Simulative component Welding residual stress |
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