NURBS isogeometric solving method for internal feedback dynamic and static pressure sliding bearing oil film pressure field

Abstract

The invention discloses an NURBS isogeometric solving method for an internal feedback dynamic and static pressure sliding bearing oil film pressure field. The method comprises the following steps: firstly, determining an analysis model of a bearing oil film pressure solving problem, defining a shape control point representing a solving region, establishing a complete isogeometric analysis node vector and a shape interpolation basis function based on an NURBS theory under a parameter coordinate system, generating a numerical analysis grid, and obtaining an accurate analysis model according to calculation precision and capability; establishing a geometric analysis model of bearing oil film pressure and the like; based on an equal parameter conversion idea, carrying out isogeometric method discretization on the analysis domain to construct an inner bearing oil film static pressure distribution field; constructing a bearing oil film pressure distribution calculation model; deriving an equivalent integral weak form of a steady incompressible oil film Reynolds equation; integrating and deriving an equivalent integral weak form of a steady incompressible oil film Reynolds equation on a solving domain, applying a boundary condition, deriving an oil film pressure calculation equation based on an isogeometric analysis theory to obtain a linear equation set, and solving to obtain bearingoil film thickness and static pressure distribution.

Description

technical field [0001] The invention belongs to the technical field of solving the oil film performance of an internal feedback dynamic and static pressure sliding bearing, and in particular relates to a geometric solution method such as NURBS for the oil film pressure field of an internal feedback dynamic and static pressure sliding bearing. Background technique [0002] Sliding bearings are very important parts in mechanical equipment. Compared with rolling bearings, sliding bearings have the advantages of small frictional resistance, high efficiency, and good vibration absorption performance, and are widely used; sliding bearings are divided into dynamic pressure bearings, static bearings according to their working principles. Pressure bearings and dynamic and static pressure bearings, due to the poor start-up characteristics of dynamic pressure bearings, are prone to dry friction, damage, and burning accidents when they go through the three stages of static friction, boun...

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Problems solved by technology

[0004] However, at present, there is still a lack of theoretical basis for the analysis of the complex coupled physical fields in such dynamic and static sliding bearings with internal feedback, and it is impossible to accurately obtain physical field information from the perspective of numerical calculations, resulting in the design of this type of dynamic and static sliding bearings. Staying at the stage of empirical design, the design of bearing performance and structure lacks theoretical and precise control, which has huge unreliability and non-optimality. Therefore, there is an urgent need for a numerical analysis method to solve the problem of hydrodynamic and static sliding bearings efficiently and with high quality. Oil film pressure distribution physical field information

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