Research On Stability Of High-Speed Rotating Machinery Rotor-Bearing System

With the rapidly increased demand of electric power,aviation and other industries, the capacity and parameters of high-speed rotating machinery,such as Gas turbine,have been improved.As a result,the rotor is made more and more large-span,flexible and heavy-duty.So,it is very important to study the stability of shaft units.The problem of stability of shaft units has always been a prominent problem in the process of design, manufacture and operation.According to the study of rotor-bearing system with a single disk and the establishment of physical and mathematical models,the way of numerical analysis is used to analyze and study a single-disk rotor - bearing system against nonlinear oil film force.In the end,the general law is found and the effective means is provided to study the rotor system of high-speed rotating machinery.