Focuses on comprehensive evaluation of three key elements of natural frequency; resonance severity; and stability margin, through the use of examples with figures and tables
Provides a consistent approach to bridge rotor shaft vibrations featuring gyroscopic effects in an inertial coordinate frame and blade vibrations under Coriolis forces acting in a rotating reference frame
Helps to understand applying accurately reduced models to identify the solution of rotor vibration problems
This book opens with an explanation of the vibrations of a single degree-of-freedom (dof) system for all beginners. Subsequently, vibration analysis of multi-dof systems is explained by modal analysis. Mode synthesis modeling is then introduced for system reduction, which aids understanding in a simplified manner of how complicated rotors behave. Rotor balancing techniques are offered for rigid and flexible rotors through several examples. Consideration of gyroscopic influences on the rotordynamics is then provided and vibration evaluation of a rotor-bearing system is emphasized in terms of forward and backward whirl rotor motions through eigenvalue (natural frequency and damping ratio) analysis. In addition to these rotordynamics concerning rotating shaft vibration measured in a stationary reference frame, blade vibrations are analyzed with Coriolis forces expressed in a rotating reference frame. Other phenomena that may be assessed in stationary and rotating reference frames includestability characteristics due to rotor internal damping and instabilities due to asymmetric shaft stiffness and thermal unbalance behavior.
Authors and Affiliations
The National Defense Academy, Yokosuka, Japan
Osami Matsushita
The University of Tokyo, Tokyo, Japan
Masato Tanaka
Kobe University, Kobe, Japan
Hiroshi Kanki
IHI Corporation, Yokohama, Japan
Masao Kobayashi
The University of Bath, Bath, United Kingdom
Patrick Keogh
Bibliographic Information
Book Title: Vibrations of Rotating Machinery
Book Subtitle: Volume 1. Basic Rotordynamics: Introduction to Practical Vibration Analysis
