Optimum Design of High Speed Journal Bearings by Mathematical Programming

概要

論文の詳細を見る
Generally, the selection of optimum design variables in the bearing design is done by a trial and error method using a large number of design charts. However, it is not so easy to select succesfully the optimum design variables. In addition, a considerable amount of time is needed to complete the optimum design. In this research work, the optimum design procedure of high-speed, short journal bearings under laminar and turbulent flow conditions is developed based on the mathematical programming. Applying the short bearing assumption to the modified turbulent Reynolds equation, simplified closed form design formulas are obtained for the eccentricity ratio, friction force, film temperature rise, flow rate and whirl onset velocity as a function of design variables such as radial clearance, slenderness ratio and averaged viscosity of lubricants. Then, using these design formulas, the design varibles, which optimize the objective function given by a linear summation of temperature rise and flow rate with respective weighting factor, are determined for a wide range of journal rotational speeds under various constraints.
東海大学の論文