Effects of the Test Piece Rotor on the Test Bench Rotor Unbalanced Lateral Vibration
The dynamic performance of the united gas turbines compressor test bench is determined jointly by test bench rotors and the test piece rotors.The experimental requirements for different test pieces during actual operation should be met since the test bench that has been built.Therefore,it is necessary to consider the impact of the test piece rotor on the test bench rotor unbalanced lateral vibrationwhen a test piece rotor will be designed.In the paper,the dynamic characteristics of unknown test piece rotors are considered as the mechanical impedance at the interface between the test bench rotor and the test piece rotor,and the impedance matching principle of the mechanical impedance synthesis method is used at the interface to determine the influence of the test piece rotor on the test bench rotor unbalancedlateral vibration.Then the design range of unknown test piece rotors are obtained.Finally,the dynamic model of a test benchrotor and a test piece rotor is established,and the lateral vibration is analyzed to validate the effectiveness of the design range for the test piece rotor unbalanced lateral vibration.The conclusions of the paper provide guidance for compressor test piece rotors design.
compressor test benchlateral vibrationunbalance responsemechanical impedance method
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