Vibration analysis of steam turbine discs

A knowledge of the vibration characteristics of discs of steam turbines is a prerequisite for a successful design of the turbine. As a matter of fact, considerable research effort, both theoretical and experimental, has been directed towards understanding the dynamic behaviour of blades and discs taken singly and jointly. This paper presents a theoretical analysis of the vibration characteristics of a steam turbine disc. In particular, the Runge—Kutta method has been used to solve the differential equation governing the flexural oscillations of the disc. Numerical results evaluated for a typical disc are presented.