Mechanism and influential factors research of slip damage in rotor bolted joint structures
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摘要:
针对转子法兰-螺栓连接结构及其所处的载荷环境，考虑了其定位端面和定心柱面变形交互影响的力学过程，并提出了滑移损伤定量评估方法，基于此分析了复杂载荷作用下界面滑移损伤力学过程及其关键影响因素。研究表明：由于转子螺栓连接结构的界面非连续性，其定位端面和定心柱面间不同方向上的变形会交互影响，并且会受到工艺和装配特征参数的影响，实际发动机中由于上述参数随机特性，会导致连接结构界面滑移损伤具有显著的非确定性，引起连接结构发生附加变形并影响转子不平衡状态。
Abstract:The mechanical process of the interaction between the deformation of the positioning end face and the centering cylinder was considered for the rotor flange-bolted connection structure and its load environment, and a quantitative evaluation method for slip damage was proposed. Based on this, the mechanical process of interface slip damage under complex load and its key influential factors were analyzed. The results showed that due to the interface discontinuity of the rotor bolted connection structure, the deformation in different directions between the positioning end face and the centering cylinder could interact with each other, and could be affected by the process and assembly characteristic parameters.
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Key words:
- bolted flange /
- slip damage /
- interface interaction impact /
- quantitative evaluation /
- aeroengine rotor
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图 1 航空发动机典型螺栓连接结构及其载荷
Figure 1. Typical bolt joint in an aero engine and its applied loads while operating
图 4 涡轮前螺栓连接结构有限元模型
Figure 4. Finite element model of turbine front bolted connection structure
图 5 载荷边界条件及加载方式示意图
Figure 5. Schematic diagram of load boundary condition and loading method
图 6 装配-最大工作-卸载状态下各界面接触状态
Figure 6. Contact state of various fields under state of assembly-maximum working-unloading
图 7 装配-最大工作-卸载状态下各界面接触特征表征参数变化
Figure 7. Change of characterization parameters of contact characteristics of various surfaces in state of assembly-maximum working-unloading
图 8 左定心柱面径向滑移特征随转速的变化
Figure 8. Changes of axial slip characteristics of left centering cylinder with rotating speed
图 9 左定位端面轴向滑移特征随转速的变化
Figure 9. Changes of axial slip characteristics of left positioning end face with rotating speed
图 10 定心柱面过盈量对界面接触特征的影响（装配状态）
Figure 10. Influence of interference of centering cylinder on interface contact characteristics （assembling condition）
图 11 定心柱面过盈量对界面接触特征的影响（最大工作状态）
Figure 11. Influence of interference of centering cylinder on interface contact characteristics（maximum working condition）
图 12 定心柱面过盈状态对定心柱面轴向滑移的影响
Figure 12. Influence of interference of centering cylinder on axial slip of centering cylinder
图 13 螺栓预紧力对界面接触特征的影响 （装配状态）
Figure 13. Influence of bolt preload on interface contact characteristics （assembling condition）
图 14 螺栓预紧力对界面接触特征的影响（最大工作状态）
Figure 14. Influence of bolt preload on interface contact characteristics （maximum working condition）
图 15 螺栓预紧力对定心柱面轴向滑移的影响
Figure 15. Influence of bolt preload on axial slip of centering cylinder
表 1 定心柱面过盈量
Table 1. Interference of centering cylinder
mm 计算状态 最小过盈 中间过盈 最大过盈 左侧定心柱面 0.10 0.20 0.30 右侧定心柱面 0.05 0.10 0.15 
下载: 导出CSV
表 2 螺栓初始预紧力设置
Table 2. Bolt initial preload setting
N 计算状态 螺栓初始预紧力 最小状态 19600 中间状态 24500 最大状态 29400
下载: 导出CSV
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