Dynamic modeling for rotor-bearing system with electromechanically coupled boundary conditions. (English) Zbl 1481.74189
Summary: In this paper, a method based on Green’s function is proposed for the dynamic analysis of a rotor-bearing system with electromechanically coupled boundary conditions. The rotor system is supported by two ring-shaped piezoelectric dampers, which has been manufactured in our previous research. Based on the piezoelectric shunt resonant circuits, e.g., current flowing shunt circuit, the rotor system’s boundary condition will become complicated and electromechanically coupled. The Laplace transform method is applied to solve the partial governing equations with such boundary conditions and the steady-state whirl Green’s function is derived subsequently. Since the Green’s functions are fundamental solutions of the system, the steady-state whirl solutions can be obtained by applying the superposition principle. Owing to the solutions’ concise form, it is convenient and suitable for analysis and computation. Validation of the proposed method is demonstrated by comparison with the finite element method (FEM). The simulated results show that the analytical solutions possess high accuracy and the piezoelectric damper has significant damping performance.
MSC:
| 74F15 | Electromagnetic effects in solid mechanics |
Keywords:
rotor-bearing system; Rayleigh beam; Green’s function; electromechanically coupled boundary condition; piezoelectric shunt dampingReferences:
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