Structural analysis of vibrational characteristics of rotor systems

Abstract

In most practical cases, rotor systems are complicated mechanical objects. In solving a number of problems, such as investigated of dynamics and determining the technical state of elements of a rotor system, it is necessary to measure the spectral characteristics of vibration of some connection joints. As a rule, this is not always possible to do directly and leads to the need for a structural analysis of vibration processes. This analysis includes some questions such as partitioning complicated mechanical system on elementary systems, estimating relationships of coordinates and determination of unobservable parameters by observable. The graph method of connections is one of the most promising techniques of structural analysis. This method determines typical models of the dynamic processes of rotor systems with regard to characteristics of individual elements.

A Proposed Bearing Load Identification Method to Uncertain Rotor Systems

“…e elastic modulus E of the rotor material is 210 GPa, the shear elastic modulus G is 80 GPa, and the density is 7650 kg/ m 3 . e disc weight is 14 kg, and the unbalance mass to construct unbalanced force F e of 14 kg at 0°is placed at 1 mm radii from the center of the middle disc.…”

“…Safety and reliability of the high-speed rotating mechanical equipment has attracted much attention with the increase in rotational speed and power [1][2][3]. In order to reduce the loss caused by mechanical equipment faults and achieve efficient fault diagnosis, it is necessary to perceive and manage the running status and health level of its key systems and components in real time [4].…”