航空发动机作动系统CFRP作动器正弦振动寿命仿真分析及设计

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Simulation analysis and design of CFRP actuator under harmonic vibration in aero-engine actuation system

MAJijun*，LiPengfei （AVIC Qing'an Group Co.，Ltd.， Xi'an 710077）

Abstract：Toadressthelightweightrequirements ofaircraft engineactuationsystems，adesignschemeforanactuator cylinderincorporating lightweightcarbon fiber-reinforced polymer（CFRP） isproposed.Basedon Miner's linear cumulative damagetheory，finiteelementharmonic vibrationanalysiswasperformedontheCFRPactuatorcylinder.Thisanalysis dentifiedcriticallocationsonthecylinderunder harmonicloads.Using thestressresponseat these critical pointsandthe dwell pointstress results，theharmonic vibration fatiguelifeofthecriticalcomponents wascalculated.Thecalculationsrevealed thatthe weak points ofthiscompositeactuatorcylinderoccuratthepiston jointandthecylinderbody.Under the specified loadingconditionsof 2O hours ofstandard sinusoidalspectrum vibrationand1hourof triaxial dwellfequency vibration，the design meets the vibration life requirements.

Keywords：carbon fiber composite;actuator;harmonicanalysis; vibration fatigue life

1引言

在飞机发动机的正常运转过程中，发动机结构需承受压气机转子叶片高速旋转运转产生的振动，振动寿命是航空发动机各组成部件结构强度普遍存在的问题之一，其决定的航空发动机寿命及可靠性直接关系到飞机的安全性能。（剩余5027字）