FBO激励下含熔断结构转子动力学特性试验研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (3) : 301-308.

第16届全国转子动力学学术大会会议论文

FBO激励下含熔断结构转子动力学特性试验研究

褚雯楠，何泽侃*，宣海军

作者信息 +

Test study on dynamic characteristics of rotor with fuse structure under FBO excitation

CHU Wennan, HE Zekan*, XUAN Haijun

Author information +

文章历史 +

摘要

为研究风扇叶片丢失（Fan Blade Off，FBO）后含熔断结构转子系统的动力学响应特征，基于相似理论设计了一套与真实大涵道比涡扇发动机低压转子结构跨距比一致、动力学特性相似的缩尺模拟转子；设计了一种带减薄段和削弱孔的锥壁熔断结构，通过有限元分析确定了其失效阈值范围，在卧式高速旋转试验台上开展了FBO激励下含熔断结构的转子动力学特性试验研究。结果表明：熔断结构失效后模拟转子的一阶、二阶临界转速数值分别下降了30.4%、3.0%，与FBO的响应峰值数据相比，2#轴承座与前支座的冲击振动响应对于熔断结构失效更为敏感，且在转子降速时，5#轴承座的振动响应对一阶和二阶临界转速敏感程度近似，转子的大不平衡载荷有较大部分通过2#支点传递到外部。

Abstract

To research the dynamic response characteristics of the rotor system with fusing structure under Fan Blade Off (FBO), a reduced-scale simulated rotor with the same span ratio and similar dynamic characteristics as the low pressure rotor of an actual high bypass ratio turbofan engine was designed based on the similarity theory. A cone fusing structure with thinning section and weakening holes was designed, and its failure threshold range was determined by finite element analysis. The dynamic characteristics of the rotor with fusing structure failure under FBO were studied on the horizontal high-speed rotating test platform. Research shows that the first and second order critical speed values of the simulated rotor decrease by 30.4% and 3.0% respectively after the failure of the fusing structure. Compared with the peak response data of FBO, the shock vibration response of 2# bearing seat and front support is more sensitive to the failure of fusing structure. The vibration response of the 5# bearing seat is approximately sensitive to the first and second critical speed when the rotor speed is reduced, and a large part of the unbalanced load of the rotor is transferred to the outside through the 2# support.

导出引用

褚雯楠, 何泽侃, 宣海军. FBO激励下含熔断结构转子动力学特性试验研究[J]. 振动与冲击, 2025, 44(3): 301-308

CHU Wennan, HE Zekan, XUAN Haijun. Test study on dynamic characteristics of rotor with fuse structure under FBO excitation[J]. Journal of Vibration and Shock, 2025, 44(3): 301-308

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