Vibration test method for high-temperature turbine casing part of aero-engine

The invention discloses a vibration test method for a high-temperature turbine casing part of an aero-engine. The method comprises the following steps of: installing a vibration measurement system, enabling a vibration sensor to be installed at a measurement point of a high-temperature turbine casing part of an aero-engine, and sequentially carrying out the electrical signal connection with a charge amplifier and a spectrum analyzer; adjusting the sampling frequency of the spectrum analyzer to enable the sampling frequency to be at least twice larger than the resonant frequency of the vibration sensor; observing the FFT frequency spectrum displayed by the spectrum analyzer, and determining whether an exponentially attenuated low-frequency interference phenomenon occurs in a specified frequency band range or not; and when the low-frequency interference phenomenon of exponential attenuation occurs in the specified frequency band range, filtering out the low-frequency interference signalof exponential attenuatio