【摘要】 工况传递路径技术(operational transfer path analysis, OTPA)可以根据运行工况下的振动数据对故障进行溯源分析，该方法需要有大量不同工况下的运行数据，这对于航空发动机等很多旋转机械而言是不现实的。为解决运行工况数量不足问题，提出一种基于频响函数的工况传递路径分析方法。以航空发动机转子试验台为例，试验获取整机状态下激励点到轴承座和机匣测点的频响函数矩阵，将其作为OTPA模型的输入和输出，通过奇异值分解技术消除输入之间的串扰导致的矩阵病态，进而求出传递率矩阵。根据传递率系数确定机匣各部位对各轴承座的振动敏感度，根据振动贡献量确定机匣振动来源。在航空发动机双转子试验台上开展了试验研究，验证了该方法的可靠性。更多还原

【Abstract】 Operational transfer path analysis(OTPA) can trace the source of faults according to vibration data of rotating machineries under operating conditions. This method requires a large number of operating data under different operating conditions, which is unrealistic for many rotating machineries, such as, aeroengines.Here, to solve the problem of insufficient amountdata under operating conditions, an OPTA method based on frequency response function was proposed. Taking an aeroengine rotor test platform as an example, the frequency response function matrix from excitation pointson rotating machinery bearing pedestal to measuring pointson itscasing under the whole machine statewas obtained as the transfer matrix between inputs and outputs of the OTPA model. The matrix ill-conditions caused by crosstalk between inputs were eliminated by using the singular value decomposition(SVD) technique, and then the transmissibility matrix was obtained.According to transmissibility coefficients, vibration sensitivitiesof various positionsoncasing to excitation points on each bearing pedestal were determined, and according to vibration contributions, vibration sources of casing were determined. The reliability of the proposed method was verified by test study on aeroengine double-rotor test platform.更多还原