| Summary: | 碩士 === 國立交通大學 === 機械工程研究所 === 85 === The scroll compressor is promising in the compressor industry due to its high efficiency, low vibration, low noise, few numbers of components, and high reliability. This work aims to investigate dynamics of the crankshaft that drives the scroll in a scroll compressor. Theoretical derivation and computer simulation are undertaken to provide a design basis for the design of scroll compressors, such as geometric design and strength analysis. The dynamic stiffness method is used to analyze the dynamic behavior of crankshafts. First, according to the governing equation of the beam, shape functions and dynamic stiffness matrices are obtained. The dynamic stiffness matrices for elements are combined to form the dynamic stiffness matrix of the entire system. The modal analysis method and the bisection method is employed to solve natural frequencies and mode shapes. The mode-superposition method and the Runge-Kutta method is in turn used to solve the dynamic response of the crankshaft. Finally, Experiments are conducted to measure shaking moments and forces of the crankshaft, which is driven by an AC servo motor.
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