全部
图书
期刊
学位论文
会议论文
报纸
图片
视频
新闻
按文献类别分组
按栏目分组
关键词
- 航空发动机叶片热障涂层寿命智能预测方法研究
- 作者： 樊珊珊 来源： 西安理工大学 年份： 2021 文献类型 ： 学位论文 关键词： 特征提取 卷积神经网络 热振实验 热障涂层
- 描述： 航空发动机叶片热障涂层寿命智能预测方法研究
- 航空发动机叶片热障涂层寿命智能预测方法研究
- 作者： 樊珊珊 来源： 西安理工大学 年份： 2021 文献类型 ： 学位论文 关键词： 特征提取 卷积神经网络 热振实验 热障涂层
- 描述： 航空发动机叶片热障涂层寿命智能预测方法研究
- 航空发动机热障涂层结构的低速冲击性能研究
- 作者： 郑成洲 来源： 中国民航大学 年份： 2020 文献类型 ： 学位论文 关键词： 损伤形式 热障涂层 有限元 功能梯度 低速冲击
- 描述： 航空发动机热障涂层结构的低速冲击性能研究
- 航空发动机热障涂层结构的低速冲击性能研究
- 作者： 郑成洲 来源： 中国民航大学 年份： 2020 文献类型 ： 学位论文 关键词： 损伤形式 热障涂层 有限元 功能梯度 低速冲击
- 描述： 航空发动机热障涂层结构的低速冲击性能研究
- 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.
- 基于热滚轧-车齿复合工艺的航空面齿轮残余应力研究
- 作者： 靳园园 来源： 河南科技大学 年份： 2022 文献类型 ： 学位论文 关键词： 面齿轮 残余应力 车齿加工 热滚轧
- 描述： 基于热滚轧-车齿复合工艺的航空面齿轮残余应力研究