A versatile analytical method(VAM) for calculating the harmonic components of the magnetomotive force(MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method ha...A versatile analytical method(VAM) for calculating the harmonic components of the magnetomotive force(MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method has been established in early literature. However, its practical applications and significance in advancing the analysis of AC machines need further elaboration. This paper aims to complement VAM by augmenting its theory, offering additional insights into its conclusions, as well as demonstrating its utility in assessing armature windings and its application of calculating torque for permanent magnet synchronous machines(PMSM). This work contributes to advancing the analysis of AC machines and underscores the potential for improved design and performance optimization.展开更多
为探究平纹织物复合材料的组分细观强度,笔者基于细观力学失效(micro-mechanics of failure, MMF)理论提出了一种确定平纹织物复合材料细观强度的跨尺度分析方法。建立了单向带复合材料和平纹织物复合材料纤维束的细观尺度代表体积单元...为探究平纹织物复合材料的组分细观强度,笔者基于细观力学失效(micro-mechanics of failure, MMF)理论提出了一种确定平纹织物复合材料细观强度的跨尺度分析方法。建立了单向带复合材料和平纹织物复合材料纤维束的细观尺度代表体积单元有限元模型,并介绍了基于代表体积单元模型的宏-细观应力转换方法;根据单向带复合材料的宏观强度测试结果确定了单向带复合材料的组分细观强度;以单向带复合材料组分细观强度为基础,根据组分强度不变的假设反推了平纹织物复合材料的纤维束强度,并以平纹织物复合材料层板宏观强度试验结果对反推所得的纤维束强度进行了校验与修正;以纤维束强度为基础,结合细观尺度代表体积单元模型,确定了平纹织物复合材料的纤维、基体组分强度。针对T300/环氧复合材料,应用上述方法并结合宏观强度测试,确定了平纹织物复合材料的组分细观强度。研究结果表明所提出的分析方法和计算结果与实验结果较为符合,可应用于实际工程复合材料。展开更多
On September 13-14th, the 13th China International Man-made Fiber Conference (Ke Qiao 2007) was held in the county of Ke Qiao, Shaoxing County, Zhejiang Province of China,
As an annual calendar event, China’s International Man-made Fiber Conference sets out, as always as it started over 20 years ago, to provide an international platform at its 13th International Conference for technica...As an annual calendar event, China’s International Man-made Fiber Conference sets out, as always as it started over 20 years ago, to provide an international platform at its 13th International Conference for technical exchange and cooperation in an effort to direct Chinese MMF’s future roadmap. Mr. Zheng Zhiyi, President of China Chemical Fiber Association (CCFA), will roll out a technological tracking back into the past, and technological forecast back into the future, showing his determination in encouraging science and technology to play a contributive major role in beefing up the chemical fiber industry in China.展开更多
基金supported by the Natural Science Foundation of China under Grant U22A20214 and Grant 51837010。
文摘A versatile analytical method(VAM) for calculating the harmonic components of the magnetomotive force(MMF) generated by diverse armature windings in AC machines has been proposed, and the versatility of this method has been established in early literature. However, its practical applications and significance in advancing the analysis of AC machines need further elaboration. This paper aims to complement VAM by augmenting its theory, offering additional insights into its conclusions, as well as demonstrating its utility in assessing armature windings and its application of calculating torque for permanent magnet synchronous machines(PMSM). This work contributes to advancing the analysis of AC machines and underscores the potential for improved design and performance optimization.
文摘为探究平纹织物复合材料的组分细观强度,笔者基于细观力学失效(micro-mechanics of failure, MMF)理论提出了一种确定平纹织物复合材料细观强度的跨尺度分析方法。建立了单向带复合材料和平纹织物复合材料纤维束的细观尺度代表体积单元有限元模型,并介绍了基于代表体积单元模型的宏-细观应力转换方法;根据单向带复合材料的宏观强度测试结果确定了单向带复合材料的组分细观强度;以单向带复合材料组分细观强度为基础,根据组分强度不变的假设反推了平纹织物复合材料的纤维束强度,并以平纹织物复合材料层板宏观强度试验结果对反推所得的纤维束强度进行了校验与修正;以纤维束强度为基础,结合细观尺度代表体积单元模型,确定了平纹织物复合材料的纤维、基体组分强度。针对T300/环氧复合材料,应用上述方法并结合宏观强度测试,确定了平纹织物复合材料的组分细观强度。研究结果表明所提出的分析方法和计算结果与实验结果较为符合,可应用于实际工程复合材料。
文摘On September 13-14th, the 13th China International Man-made Fiber Conference (Ke Qiao 2007) was held in the county of Ke Qiao, Shaoxing County, Zhejiang Province of China,
文摘As an annual calendar event, China’s International Man-made Fiber Conference sets out, as always as it started over 20 years ago, to provide an international platform at its 13th International Conference for technical exchange and cooperation in an effort to direct Chinese MMF’s future roadmap. Mr. Zheng Zhiyi, President of China Chemical Fiber Association (CCFA), will roll out a technological tracking back into the past, and technological forecast back into the future, showing his determination in encouraging science and technology to play a contributive major role in beefing up the chemical fiber industry in China.
