随着齿轮传动系统向着高复杂性、多传动样式和高可靠性等方向发展,快速准确地对齿轮传动系统进行可靠性分配变得越来越重要。针对现有可靠性分配方法存在的考虑因素不全面、同一参数不同分配方法变化范围不统一、不便于数字化软件开发...随着齿轮传动系统向着高复杂性、多传动样式和高可靠性等方向发展,快速准确地对齿轮传动系统进行可靠性分配变得越来越重要。针对现有可靠性分配方法存在的考虑因素不全面、同一参数不同分配方法变化范围不统一、不便于数字化软件开发等问题,提出了改进电子设备可靠性咨询组(Advisory Group on Reliability of Electronic Equipment,AGREE)分配法,扩展了评分分配法;探讨了可靠性分配方法的数字化特征,建立了齿轮传动系统的基本可靠性与任务可靠性模型,研究了可靠性模型自动生成的遍历算法;开发了定轴轮系、行星轮系和混合轮系可靠性快速分配的数字化平台,设计了输入模块、计算模块、结果显示模块和输出模块等4个独立模块;通过与实例结果的比较,该软件计算结果的准确性得到了验证;同时也实现了齿轮传动系统可靠性分配的参数化建模与自动化生成算例报告等功能,提高了可靠性分配模型精度和计算效率。展开更多
Based on the force-heat equivalence energy density principle,a theoretical model for magnetic metallic materials is developed,which characterizes the temperature-dependent magnetic anisotropy energy by considering the...Based on the force-heat equivalence energy density principle,a theoretical model for magnetic metallic materials is developed,which characterizes the temperature-dependent magnetic anisotropy energy by considering the equivalent relationship between magnetic anisotropy energy and heat energy;then the relationship between the magnetic anisotropy constant and saturation magnetization is considered.Finally,we formulate a temperature-dependent model for saturation magnetization,revealing the inherent relationship between temperature and saturation magnetization.Our model predicts the saturation magnetization for nine different magnetic metallic materials at different temperatures,exhibiting satisfactory agreement with experimental data.Additionally,the experimental data used as reference points are at or near room temperature.Compared to other phenomenological theoretical models,this model is considerably more accessible than the data required at 0 K.The index included in our model is set to a constant value,which is equal to 10/3 for materials other than Fe,Co,and Ni.For transition metals(Fe,Co,and Ni in this paper),the index is 6 in the range of 0 K to 0.65T_(cr)(T_(cr) is the critical temperature),and 3 in the range of 0.65T_(cr) to T_(cr),unlike other models where the adjustable parameters vary according to each material.In addition,our model provides a new way to design and evaluate magnetic metallic materials with superior magnetic properties over a wide range of temperatures.展开更多
文摘随着齿轮传动系统向着高复杂性、多传动样式和高可靠性等方向发展,快速准确地对齿轮传动系统进行可靠性分配变得越来越重要。针对现有可靠性分配方法存在的考虑因素不全面、同一参数不同分配方法变化范围不统一、不便于数字化软件开发等问题,提出了改进电子设备可靠性咨询组(Advisory Group on Reliability of Electronic Equipment,AGREE)分配法,扩展了评分分配法;探讨了可靠性分配方法的数字化特征,建立了齿轮传动系统的基本可靠性与任务可靠性模型,研究了可靠性模型自动生成的遍历算法;开发了定轴轮系、行星轮系和混合轮系可靠性快速分配的数字化平台,设计了输入模块、计算模块、结果显示模块和输出模块等4个独立模块;通过与实例结果的比较,该软件计算结果的准确性得到了验证;同时也实现了齿轮传动系统可靠性分配的参数化建模与自动化生成算例报告等功能,提高了可靠性分配模型精度和计算效率。
基金Project supported by the Natural Science Foundation of Chongqing(Grant No.CSTB2022NSCQ-MSX0391)。
文摘Based on the force-heat equivalence energy density principle,a theoretical model for magnetic metallic materials is developed,which characterizes the temperature-dependent magnetic anisotropy energy by considering the equivalent relationship between magnetic anisotropy energy and heat energy;then the relationship between the magnetic anisotropy constant and saturation magnetization is considered.Finally,we formulate a temperature-dependent model for saturation magnetization,revealing the inherent relationship between temperature and saturation magnetization.Our model predicts the saturation magnetization for nine different magnetic metallic materials at different temperatures,exhibiting satisfactory agreement with experimental data.Additionally,the experimental data used as reference points are at or near room temperature.Compared to other phenomenological theoretical models,this model is considerably more accessible than the data required at 0 K.The index included in our model is set to a constant value,which is equal to 10/3 for materials other than Fe,Co,and Ni.For transition metals(Fe,Co,and Ni in this paper),the index is 6 in the range of 0 K to 0.65T_(cr)(T_(cr) is the critical temperature),and 3 in the range of 0.65T_(cr) to T_(cr),unlike other models where the adjustable parameters vary according to each material.In addition,our model provides a new way to design and evaluate magnetic metallic materials with superior magnetic properties over a wide range of temperatures.