航空发动机

秦天龙，葛向东，路阳，吴法勇，耿春晖.航空发动机全静子机匣支点动柔度试验[J].航空发动机,2025,51(6):115-119

航空发动机全静子机匣支点动柔度试验

Support Dynamic Compliance Test for Aeroengine Full Stator Casing

DOI：

英文关键词:full static structure assembly dynamic flexibility unbalance excitation vibration test aeroengine

基金项目:国防工业重点研究项目资助

作者	单位
秦天龙，葛向东，路阳，吴法勇，耿春晖	中国航发沈阳发动机研究所，沈阳110015

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中文摘要:

为研究航空发动机全静子机匣在高压转子不平衡激励条件下的振动能量的传递特性，对发动机进行测试改装。设计了一种模拟真实状态转子不平衡激励的高速旋转激振装置，开展了发动机全静子机匣对No.3支点支承的动柔度试验。通过测试不平衡激振力下支点轴承座与整机外机匣的振动响应，计算获得了全静子机匣在试验转速范围内的动柔度结果。结果表明：在发动机试验转速范围内，轴承座与外机匣的支点动柔度随转速增大而增大，外机匣柔度增大倍数大于轴承座增大倍数；在定不平衡激励条件下轴承座与外机匣振动测点的振动相位保持稳定；外机匣测点受发动机结构振动模态影响较大，在多个转速下存在共振峰，轴承座测点振动更加体现转子激励特性。

英文摘要:

To investigate the vibration energy transfer characteristics of an aeroengine full stator casing under high-pressure rotor unbalance excitation, test modifications were performed on the engine. A high-speed rotating vibration excitation device simulating real- state rotor real unbalance excitation was designed, and the dynamic flexibility tests were conducted on the No.3 support of the engine's full stator casing. The dynamic flexibility results of the full stator casing within the test speed range were calculated by measuring the vibration response from the support bearing housing and outer casing under unbalance excitation forces. The experimental results indicate that Within the engine operating speed range, the dynamic flexibility of both the bearing housing and outer casing increases with the increase of engine speed, with the outer casing exhibiting a greater rate of increase than the bearing housing. Under constant unbalance excitation, the phase of vibration response between the bearing housing and the outer casing remains stable. The measuring point of the outer casing is significantly affected by engine structural vibration modes, showing resonance peaks at multiple speeds, while the bearing housing vibra? tions give a better reflection of the rotor excitation characteristics.

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