| 考虑支承约束的航空发动机复杂转子振动特性 |
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| 引用本文： | 王龙凯,王艾伦,尹伊君,衡星,金淼,张海彪.考虑支承约束的航空发动机复杂转子振动特性[J].航空动力学报,2023,38(4):901-912. |
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| 作者姓名： | 王龙凯 王艾伦 尹伊君 衡星 金淼 张海彪 |
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| 作者单位： | 1.中南大学 轻合金研究院，长沙 410083 |
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| 基金项目： | 国家重点基础研究发展计划（2013CB035706）； 中央高校基本科研业务费专项资金（2019zzts256） |
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| 摘 要： | 针对航空发动机转子复杂的结构特征及支承动力学设计问题，基于有限元(FE)、分段线性拟合和自由度(DOF)降维法，采用主子单元对复杂转子进行合理地等效，构建了航空发动机等复杂转子-支承系统的动力学模型，并对模型的有效性进行了试验验证。从转子固有特性、应变能分布、支承传递力和振动响应等方面对支承刚度进行了设计，并开展了弹性支承并联挤压油膜阻尼器(SFD)非线性减振效率分析。结果表明：动力学模型能较好地反映复杂转子的动力学特性，支承刚度合适取值范围为1.5×104～2.8×104 N/mm，弹性支承并联SFD设计减振和降支承力效果显著，满足临界转速设计准则、应变能约束条件和变形要求，该研究为航空发动机支承刚度和SFD并联设计提供了定量的参考依据，具有重要的工程应用价值。
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| 关 键 词： | 涡轴发动机 转子系统 挤压油膜阻尼器(SFD) 振动特性 支承刚度 动力学模型 减振 |
| 收稿时间： | 2021-08-20 |
Vibration characteristics of complex aero-engine rotors considering support constraints |
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| Affiliation: | 1.Light Alloy Research Institute，Central South University，Changsha 410083，China2.State Key Laboratory of High Performance Complex Manufacturing， Central South University，Changsha 410083，China3.Hunan Aviation Powerplant Research Institute， Aero Engine Corporation of China，Zhuzhou Hunan 412002，China |
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| Abstract: | In view of the complex structural features and support with dynamic design problems for aero-engine rotors, based on finite element (FE), piecewise linear fitting and degree of freedom (DOF) reduction, the dynamic model of complex rotor-support system of the aero-engine was built by using the main and sub-units to reasonably equivalize the complex rotor, and the validity of the modeling was verified through experiments. The supporting stiffness was designed from the aspects of rotor natural characteristics, strain energy distribution, supporting force and vibration response, and the nonlinear vibration reduction efficiency analysis of elastic support parallel squeeze film damper (SFD) was carried out. The results showed that the dynamic model can reflect the dynamic characteristics of complex rotors well. The appropriate range of support stiffness was 1.5×104?2.8×104 N/mm, and the elastic support parallel SFD design had a significant effect on reducing vibration and supporting force, which met the critical speed design, strain energy constraint and deformation requirement. It provides a quantitative reference basis for aero-engine supporting stiffness and SFD parallel design, which has important engineering application value. |
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