基于物联网的航空工业精益制造

作者： ALEKSANDR   KORCHAGIN   来源： 上海交通大学 年份： 2020 文献类型 ： 学位论文 关键词： 飞机机身组装   精益制造   物联网   ARENA   离散事件仿真  

描述： 基于物联网的航空工业精益制造

基于物联网的航空工业精益制造

作者： ALEKSANDR   KORCHAGIN   来源： 上海交通大学 年份： 2020 文献类型 ： 学位论文 关键词： 飞机机身组装   精益制造   物联网   ARENA   离散事件仿真  

描述： 基于物联网的航空工业精益制造

航空装备效能评估系统设计与实现

作者： 赵雷   来源： 大连理工大学 年份： 2021 文献类型 ： 学位论文 关键词： 灰色理论   隶属度规则   航空装备   指标体系   效能评估  

描述： 航空装备效能评估系统设计与实现

航空装备效能评估系统设计与实现

作者： 赵雷   来源： 大连理工大学 年份： 2021 文献类型 ： 学位论文 关键词： 灰色理论   隶属度规则   航空装备   指标体系   效能评估  

描述： 航空装备效能评估系统设计与实现

预警机系统综合效能评估技术研究

作者： 周晓柳婷   来源： 哈尔滨工业大学 年份： 2018 文献类型 ： 学位论文 关键词： 模糊综合评判法   预警机   效能评估   逼近理想解排序法   云模型  

描述： 预警机系统综合效能评估技术研究

基于ANP的预警机任务电子系统效能评估

作者： 张骁   来源： 哈尔滨工业大学 年份： 2020 文献类型 ： 学位论文 关键词： 幂指数法   预警机任务电子系统   指标体系   效能评估   网络层次分析法  

描述： 基于ANP的预警机任务电子系统效能评估

预警机系统综合效能评估技术研究

作者： 周晓柳婷   来源： 哈尔滨工业大学 年份： 2018 文献类型 ： 学位论文 关键词： 模糊综合评判法   预警机   效能评估   逼近理想解排序法   云模型  

描述： 预警机系统综合效能评估技术研究

基于ANP的预警机任务电子系统效能评估

作者： 张骁   来源： 哈尔滨工业大学 年份： 2020 文献类型 ： 学位论文 关键词： 幂指数法   预警机任务电子系统   指标体系   效能评估   网络层次分析法  

描述： 基于ANP的预警机任务电子系统效能评估

航空发动机零部件焊接过程仿真

作者： 唐心武   来源： 北京航空航天大学 年份： 2016 文献类型 ： 学位论文 关键词： 焊接   仿真  

描述： Welds are often an essential part of aero space engineering structures. Residual stresses introduced in the welded regions, due to the nonlinear thermal processes during welding, can have detrimental effects, such as stress corrosion cracking, hydrogen-induced cracking and reduced fatigue strength. It is therefore pertinent to simulate the process of welding to predict the behaviour of welded structures from finite element residual stress and deformation result. The base metal is Nickel based-supper alloy (INCONEL Alloy 718) of thin combustion chamber outer casing (CCOC). The simulations are performed with the commercial software SYSWELD+, which includes moving heat sources, material deposit, metallurgical properties, metal plasticity and elasticity, transient heat transfer and mechanical analyses. One-way thermo-mechanical coupling is assumed, which means that the thermal analysis is completed first, followed by a separate mechanical analysis based on the thermal history.This paper introduces finite element methods for the modeling of welds and it depicts a brief history of the simulation of welds. The processes, procedures, and metallurgy of gas-metal arc welding of nickel based alloy are presented in Chapter 2. In Chapter 3, the previous finite element analyses of welding are reviewed. The energy and constitutive equations governing a welding simulation are outlined in Chapter 4, while performing welding simulations utilizing the SYSWELD+ software is described in Chapter 5. The residual stress results for outer combustion casing are reported in Chapter6. The conclusion is described in chapter 7.Welding simulations to predict residual stress states require three-dimensional analysis in the vicinity of the joint and these analyses are computationally intensive and difficult. Although the state of the art in welding simulations using finite elements is improve as an advanced method.

航空发动机零部件焊接过程仿真

作者： 唐心武   来源： 北京航空航天大学 年份： 2016 文献类型 ： 学位论文 关键词： 焊接   仿真  

描述： Welds are often an essential part of aero space engineering structures. Residual stresses introduced in the welded regions, due to the nonlinear thermal processes during welding, can have detrimental effects, such as stress corrosion cracking, hydrogen-induced cracking and reduced fatigue strength. It is therefore pertinent to simulate the process of welding to predict the behaviour of welded structures from finite element residual stress and deformation result. The base metal is Nickel based-supper alloy (INCONEL Alloy 718) of thin combustion chamber outer casing (CCOC). The simulations are performed with the commercial software SYSWELD+, which includes moving heat sources, material deposit, metallurgical properties, metal plasticity and elasticity, transient heat transfer and mechanical analyses. One-way thermo-mechanical coupling is assumed, which means that the thermal analysis is completed first, followed by a separate mechanical analysis based on the thermal history.This paper introduces finite element methods for the modeling of welds and it depicts a brief history of the simulation of welds. The processes, procedures, and metallurgy of gas-metal arc welding of nickel based alloy are presented in Chapter 2. In Chapter 3, the previous finite element analyses of welding are reviewed. The energy and constitutive equations governing a welding simulation are outlined in Chapter 4, while performing welding simulations utilizing the SYSWELD+ software is described in Chapter 5. The residual stress results for outer combustion casing are reported in Chapter6. The conclusion is described in chapter 7.Welding simulations to predict residual stress states require three-dimensional analysis in the vicinity of the joint and these analyses are computationally intensive and difficult. Although the state of the art in welding simulations using finite elements is improve as an advanced method.