Method for obtaining vibration stress of rotor vane of engine
A technology for rotor blades and vibration stress, which is applied in vibration testing, mechanical component testing, and machine/structural component testing. , the effect of low test cost
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Embodiment 1
[0031] The invention provides a method for obtaining the vibration stress of an engine rotor blade, which specifically includes the following steps:
[0032] S1. Using traveling wave sound field to simulate noise excitation;
[0033] S2. Use the blade root clamping force method to simulate the blade root force boundary caused by the rotating speed, and install the rotor blade test piece on the fixture according to the blade root force boundary;
[0034] S3. Obtain the maximum root mean square principal stress at the maximum vibration stress part of the rotor blade by means of a dynamic strain test.
[0035] In this embodiment, in the step S1, the requirements of the test for the noise spectrum are met through the design of the traveling wave tube and the closed-loop control of the sound field, and the requirements for the direction of the noise excitation are met through the design of the installation fixture. Specifically, a small circular cross-section traveling wave tube i...
Embodiment 2
[0050] Similar to Embodiment 1, the difference is that this embodiment adopts single-frequency sound excitation, including the following steps:
[0051] S1. Using traveling wave sound field to simulate noise excitation;
[0052] S2. Use the blade root clamping force method to simulate the blade root force boundary caused by the rotating speed, and install the rotor blade test piece on the fixture according to the blade root force boundary;
[0053]S3. Obtain the maximum root mean square principal stress at the maximum vibration stress part of the rotor blade by means of a dynamic strain test.
[0054] In this embodiment, in the step S1, the requirements of the test for the noise spectrum are met through the design of the traveling wave tube and the closed-loop control of the sound field, and the requirements for the direction of the noise excitation are met through the design of the installation fixture. Specifically, a circular traveling wave tube with a small cross-section ...
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