叶片丢失后停车过程转子瞬态动力响应分析

刘畅; 徐自力; 霍施宇; 慕琴琴; 徐健

doi:10.13224/j.cnki.jasp.20210571

叶片丢失后停车过程转子瞬态动力响应分析

doi: 10.13224/j.cnki.jasp.20210571

刘畅^1,,
徐自力^1,*, ,,
霍施宇²,
慕琴琴²,
徐健²

1.
西安交通大学航天航空学院机械结构强度与振动国家重点实验室，西安 710049
2.
中国飞机强度研究所，西安 710089

详细信息

作者简介:
刘畅（1998-），男，硕士生，主要从事转子动力学研究

通讯作者:
徐自力（1967-），男，教授，博士，主要从事透平机械结构强度与振动研究。E-mail：zlxu@mail.xjtu.edu.cn

中图分类号: V231.9
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- 文章访问数: 52
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- 被引次数: 0
出版历程
- 收稿日期: 2021-10-10
- 网络出版日期: 2023-12-28

Transient dynamic response analysis of rotor during shutdown after blade loss

LIU Chang^1
,,
XU Zili^{1,*
, ,},
HUO Shiyu²,
MU Qinqin²,
XU Jian²

1.
State Key Laboratory for Strength and Vibration of Mechanical Structures，School of Aerospace Engineering，Xi’an Jiaotong University，Xi’an 710049，China
2.
Aircraft Strength Research Institute of China，Xi’an 710089，China

摘要

摘要:
为揭示叶片丢失后转子系统停车过程动力响应特征，研究了叶片丢失后叶盘转动惯量非对称性及停车过程变转速特征，建立了非对称变速转子瞬态动力响应分析模型，对叶片丢失后转子系统停车过程瞬态响应进行了分析。结果表明：叶片丢失瞬间及转子过共振区，转子系统的瞬态振动响应加剧，并伴有横向固有振动。当转动惯量非对称比例为0.2时，转子系统响应峰值与不考虑轮盘非对称性相差58%。因此，对于大质量叶片或多叶片丢失情况，轮盘转动惯量非对称性就不能忽略，表明所建转子动力学模型可以有效分析大非对称转子停车过程复杂振动响应特征。
- 非对称转子 /
- 变转速 /
- 冲击效应 /
- 叶片丢失 /
- 动力学响应
Abstract:
In order to reveal the dynamic response characteristics of the rotor system during shutdown after aero-engine blade loss, considering the blade disk moment of inertia asymmetry and the characteristics of variable speed during shutdown, the transient dynamic response analysis model of asymmetric variable speed rotor was established to analyze the transient response of rotor system during shutdown after blade loss. The results showed that when the blade was lost and the rotor passed through the resonance zone, the transient vibration response of the rotor system was intensified, accompanied by transverse natural vibration. When the asymmetric ratio of moment of inertia was 0.2, the peak response of the rotor system differed by 58% without considering the asymmetry of the disk. Therefore, for the loss of large mass blades or multiple blades, the moment of inertia asymmetry can’t be ignored, showing that the established rotor dynamics model can effectively analyze the complex vibration response characteristics of large asymmetric rotor during shutdown.
- asymmetric rotor /
- variable speed /
- shock effect /
- blade loss /
- dynamic response

HTML

图 1 叶片丢失事件转速变化

Figure 1. Speed change of blade-out

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图 2 停车过程激励载荷特征

Figure 2. Excitation load characteristics during shutdown

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图 3 典型高涵道比涡扇发动机转子

Figure 3. Typical high bypass ratio turbofan engine rotor

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图 4 叶片丢失后非对称叶盘

Figure 4. Asymmetric disk after blade-out

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图 5 多支撑悬臂转子系统

Figure 5. Multi-support cantilever rotor

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图 6 叶片丢失后转子停车过程瞬态响应

Figure 6. Transient response of rotor during shutdown after blade loss

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图 7 叶片丢失后转子停车过程时频域响应

Figure 7. Time-frequency domain response of rotor after blade loss

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图 8 陀螺效应对转子瞬态响应影响

Figure 8. Influence of the gyro effect on the transient response of the rotor

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图 9 不同加速度下转子时域瞬态响应

Figure 9. Time-domain transient response of rotor under different accelerations

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图 10 不同加速度下转子时频域响应

Figure 10. Time-frequency response of rotor under different acceleration

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图 11 叶片丢失等效圆盘缺失

Figure 11. Blade-loss equivalent to missing disks

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图 12 不同非对称比例下转子时域瞬态响应

Figure 12. Time-domain transient response of rotor under different asymmetric ratios

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表 1 多支撑悬臂转子结构参数

Table 1. Multi-support cantilever rotor structure parameters

参数	数值
叶盘质量（M_d）/kg	120
叶盘极转动惯量（J_p）/（kg·m²）	8
轴段长度（l₁, l₂, l₃）/mm	300，300，1400
轴段外径（D₁, D₂, D₃）/mm	160，160，80
轴段内径（d₁, d₂, d₃）/mm	140，140，70
支撑刚度（K₁, K₂, K₃）/10⁷ （N/m）	4，4，4
支撑阻尼（C₁, C₂, C₃）/（N·s/m）	25，25，25
弹性模量E/GPa	210
泊松比μ	0.3
密度ρ/（kg/m³）	7850
阻尼比γ	0.02
不平衡量/（kg·m）	0.01

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表 2 不同加速度下转子瞬态响应峰值

Table 2. Transient response peak value of rotor under different accelerations

参数	加速度/（rad/s²）
参数	−75	−188	−377
最大响应峰值/mm	1.53	1.24	1
最大响应峰值对应转速/（r/min）	2534	2447	2313

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表 3 不同非对称比例下转子瞬态响应结果

Table 3. Transient response results of rotor under different asymmetric ratios

非对称比例	冲击响应峰值/mm	共振响应峰值/mm
0	0.39	1.18
0.05	0.40	1.24
0.1	0.41	1.37
0.2	0.43	1.87

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