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涡轮叶片的解析成型与优化设计方法 被引量:11
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作者 王正明 贾希诚 《工程热物理学报》 EI CAS CSCD 北大核心 2001年第5期569-571,共3页
本文发展了一种对于涡轮叶片用任意圆锥曲线作为基本曲线实现几何成型的解析方法,大量试算表明,该方法可以适应相当大一部分涡轮叶片几何造型的需要.本文还用正反问题相结合的方法对实用中的涡轮叶片进行改型优化,取得了较好效果,... 本文发展了一种对于涡轮叶片用任意圆锥曲线作为基本曲线实现几何成型的解析方法,大量试算表明,该方法可以适应相当大一部分涡轮叶片几何造型的需要.本文还用正反问题相结合的方法对实用中的涡轮叶片进行改型优化,取得了较好效果,N-S流场分析表明,改型后的新叶栅比原叶栅性能有明显改善. 展开更多
关键词 涡轮叶片 解析成型 优化设计 叶轮机械 航空发动机
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试论用解析法优化薄壁焊管的成型孔型 被引量:2
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作者 曹国富 《钢管》 CAS 2011年第3期44-49,共6页
针对目前焊管行业尚无评价薄壁焊管成型孔型优劣的具体方法,提出用解析几何方法从管坯成型过程的主视、俯视和空间3个视角来评判、优化所设计的孔型。采用成型孔型几何解析法,可以对同种焊管的不同种孔型设计方案进行优化比较,便于选用... 针对目前焊管行业尚无评价薄壁焊管成型孔型优劣的具体方法,提出用解析几何方法从管坯成型过程的主视、俯视和空间3个视角来评判、优化所设计的孔型。采用成型孔型几何解析法,可以对同种焊管的不同种孔型设计方案进行优化比较,便于选用较佳方案。 展开更多
关键词 薄壁焊管 成型孔型解析 优化 边缘绝对延伸 轨迹线
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Mathematical Model and Simulation of Cutting Layer Geometry in Orthogonal Turn⁃Milling with Zero Eccentricity
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作者 SUN Tao QIN Lufang +1 位作者 FU Yucan HOU Junming 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第6期839-847,共9页
Orthogonal turn-milling is a high-efficiency and precision machining method.Its cutting layer directly affects chip formation,cutting forces,and chatter,and further affects tool life,machining quality,etc.We studied T... Orthogonal turn-milling is a high-efficiency and precision machining method.Its cutting layer directly affects chip formation,cutting forces,and chatter,and further affects tool life,machining quality,etc.We studied The cutting layer geometry(CLG)in orthogonal turn-milling with zero eccentricity(OTMZE)is studied to explore orthogonal turn-milling cutting layer formation process.OTMZE principles of motion and formation processes are analyzed statically without considering kinetic influences.Mathematical models of the entrance and exit angles,cutting thickness,and cutting depth are established.In addition,these models are validated experimentally and some influences of cutting parameters on the tool cutting layer are analyzed.The results show that OTMZE cutting layer formation can be divided into two stages,chip shapes are nearly consistent with the simulated CLGs,and the most influencial parameter in affecting the cutting layer is found to be the tool feed per revolation of workpiece fa,followed by the ratio of the tool and workpiece speedsλand the cutting depth ap.These models and results can provide theoretical guidance to clarify formation processes and quantitatively analyze changes in cutting layer geometry during OTMZE.In addition,they offer theoretical guidelines for cutting forces and chatter. 展开更多
关键词 orthogonal turn-milling zero eccentricity cutting layer geometry mathematical model forming process
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