| 洪 亮1，2 ，蒋云帆 3 ，王艳丰 2 ，贺延琛 2 ，陈静2 ，张雄2.转子初始弯曲对航空发动机振动的影响[J].航空发动机,2022,48(6):77-81 |
| Influence of Rotor Initial Bending on Aeroengine Vibration |
| DOI： |
| Key Words:vibration initial bending rotor dynamic balancing aeroengine |
|
| 摘要点击次数: 1332 |
| 全文下载次数: 1005 |
| Abstract:According to the vibration characteristics in the ground performance commissioning test of an engine，it was speculated that
the poor working condition of the high-pressure rotor was the possible cause of abnormal vibration. When disassembling and inspecting the
engine，it was found that the runout of the rear shaft of the high-pressure compressor was out of tolerance. After replacing the rear shaft that
met the requirements，the engine had no similar abnormal vibration，which proved the correctness of the vibration analysis. In order to ex?
plore the mechanical performance of the bending rotor during dynamic balancing and real engine running ，the principle of the current low-
speed dynamic balancing was deduced by using the Jeffcott rotor with initial bending，which showed that the low-speed dynamic balancing
could not eliminate the influence of the initial bending of the shaft on the vibration. Combined with the finite element simulation analysis，
the response of the rotor with initial bending was calculated. The results show that if the initial bending is too large，the vibration response
of the rotor near the critical speed will be significantly increased，which will bring huge risk to the safe and stable operation of the rotor.
Controlling the magnitude of the initial bending of the rotor is of great significance to the control of the whole engine vibration. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
