Structure design andmechanical simula-tion on the SC-MR supportfor rotor system

A typical elastic damping support com-bined of squirrel cage and metal rubber is pro-posed here and named SC-MR support for short. This paper mainly deals with the structure de-sign of the SC-MR support and the numerical simulation on its support stiffness. The technical approach on its structure design was given and the simulation models were established. Both the radial stiffness and the angular stiffness were researched by simulation, and the impacts of the loading position as well as the assembling state were obtained. The simulation results show that the loading position has a great effect on the support stiffness of the squirrel cage and the SC-MR support, especially the angular stiff-ness. While the loading position moved from the left ring to the right one, the radial stiffness var-ied by 25% and the angular stiffness varied by as much as 80%. The results also imply that both the radial stiffness and angular stiffness exhibit nonlinear increasing trends with the in-crease of the radial pre-compression. While the radial prestrain increased from 0.6% to 3.16%, the radial stiffness increased by 17.3% and the angular stiffness increased by 51.6%. The angu-lar stiffness appeared to be more sensitive to either the loading position or the assembling state.