The invention belongs to the technical field of aero-
engine testing and testing, and particularly relates to an aero-engine birotor-support-casing tester and a testing method thereof. The aero-engine birotor-support-casing tester comprises a low-pressure rotor, a central
bevel gear system, a high-pressure rotor, a low-pressure casing, a middle casing and a high-pressure casing; the low-pressure rotor comprises a low-pressure
turbine shaft, and the low-pressure
turbine shaft penetrates through the central
bevel gear system and is rotationally connected with the high-pressure rotor; and the low-pressure rotor is driven by a low-pressure driving motor, the central
bevel gear system is connected with a high-pressure driving motor, and the high-pressure rotor is driven by the central bevel
gear system. The structure is simplified and reasonable, the scale design with the fixed proportion (such as 2: 1) is adopted according to the real engine structure, and the four-stage fan disc and the nine-stage high-pressure disc are consistent with the real engine structure. Structures such as a squirrel cage, a
conical shell, a bearing
spoke plate and a flexible casing in a real
machine are reserved, the structure and vibration of an engine rotor system can be truly simulated, and the whole
machine vibration research requirement of an aero-engine is met.