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Safety Design Method of Fan Rotor System in Aeroengine due to Extreme Loadings

机译：极端负荷由于极端负荷导致航空发动机风扇转子系统的安全设计方法

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Fan blade loss is the most serious condition of typical extreme working conditions in turbofan engines. The transient huge unbalance force leads to the complicated and destructive vibration response of the rotor system. The paper proposed a set of safety design method for the rotor system, which ensured the engine to stop safely after the fan blade lost. The variable stiffness supporting structure at the rear of the fan was presented and its parameters were optimized through dynamic characteristics calculation. The results revealed that the vibration response of the rotor system could be suppressed during the speed reduction process. The spherical matching surface between the bearing ring and the rotation shaft could reduce the impact of the large shaft deformation, and enhanced the bearing's safety.
机译：风扇叶片损失是涡轮箱发动机典型极端工作条件最严重的条件。瞬态巨大的不平衡力导致转子系统的复杂和破坏性振动响应。本文提出了一套用于转子系统的安全设计方法，确保发动机在风扇刀片损失后安全地停止。提出了风扇后部的可变刚度支撑结构，通过动态特性计算优化其参数。结果表明，在减速过程中可以抑制转子系统的振动响应。轴承环和旋转轴之间的球形匹配表面可以降低大轴变形的影响，并提高了轴承的安全性。

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