Abstract: A mechanical vibration system with spiral flywheel motion transformation system has merits of lower total mass and better vibration performance. In order to promote its application and reduce integrated design complexity, the dynamical activity of the spiral flywheel is encapsulated with the dynamical analysis. According to traditional force-current electromechanical analogy theory, a novel capacitor component without parallel or grounding constraint is proposed to analogize the spiral flywheel. The component can not only solve the analogy problem for the spiral flywheel, but also perfect the traditional electromechanical analogy theory. The circuit network method is employed so that design steps for the mechanical vibration system based on the spiral flywheel analogy can be presented. In the light of the proposed design theory, the spiral flywheel is applied in a single DOF vibration isolation example for desired performance. Thereby a novel mechanical network and vibration isolation effect that cannot be realized by traditional vibration components are realized. The result shows the effectiveness of the method, which lays a theoretical foundation for integrated design of the spiral flywheel motion transformation system in the mechanical vibration system.

Key words: Electromechanical analogy, Mechanical network, Mechanical vibration, Motion transformation, Spiral flywheel