Transactions of Nanjing University of Aeronautics & Astronautics
Dynamic Analysis Model of Embedded Fluid Elastomeric Damper for Bearingless Rotor
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Abstract:
According to the structural characteristics of embedded fluid elastomeric damper and dynamic modeling method of bearingless rotor (BR) system, a time-domain dynamic model based on multilayer elastomeric theory and fluid dynamic equations is developed. The parameters contained in the analysis model are identified by dynamic experiment data of embedded fluid elastomeric damper. The dynamic characteristics curves calculated through dynamic model are compared with those derived from experimental data. The consistent results illustrate that the model can describe the nonlinear relationship between stress and strain of embedded fluid elastomeric damper under different displacement amplitude and frequency. Due to the validity and reliability of the dynamic analysis model, it can be used in aeroelastic characteristics calculation of BR with embedded fluid elastomeric damper for helicopters.
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