Study on the Oil Film Force with Unlimited Length Oil Film of the Sliding Bearing and the ERSFD with Bosses

The research background is the elastic ring squeeze film damper. Four contact pressure models were established by analyzing structural characteristics and movement, combined with sliding bearing theory, including parameters eccentricities. Multi-structure multi-interval dynamic boundary conditions selected actual structures. Simpson, polynomial, integrated methods extended Booker formulas. By combining existences forms of solution mean-value theories, approximate analytical solutions finite length obtained under different contacts. Combined short long bearing, general structures expressions oil pressures forces three approximation theories obtained. equilibrium state obtained, correctness was verified theoretical comparison. Numerical simulations analyzed relationship among relevant parameters. It provided a basis upon which to study geometric form, motion state, ERSFD model, increased its ability.