A finite element transient response analysis method of a rotor-bearing system to base shock excitations using the state-space Newmark scheme and comparisons with experiments

2006 ◽  
Vol 297 (3-5) ◽  
pp. 595-615 ◽  
Author(s):  
An Sung Lee ◽  
Byung Ok Kim ◽  
Yeong-Chun Kim
Keyword(s):  
Finite Element ◽  
State Space ◽  
Transient Response ◽  
The State ◽  
Response Analysis ◽  
Analysis Method ◽  
Newmark Scheme ◽  
Transient Response Analysis ◽  
Rotor Bearing ◽  
Bearing System

An FE Transient Response Analysis Model of a Flexible Rotor-Bearing System With Mount System to Base Shock Excitation

2007 ◽  
Author(s):  
An Sung Lee ◽  
Byung Ok Kim
Keyword(s):  
Transient Response ◽  
Transportation Systems ◽  
Integration Scheme ◽  
Response Analysis ◽  
Flexible Rotor ◽  
Analysis Model ◽  
Transient Responses ◽  
Transient Response Analysis ◽  
Rotor Bearing ◽  
Bearing System

Turbomachinery such as turbines, pumps and compressors, which are installed in transportation systems such as warships, submarines and space vehicles, etc., often perform crucial missions and are exposed to potential dangerous impact environments such as base-transferred shock forces. To protect turbomachinery from excessive shock forces, it may be needed to accurately analyze transient responses of rotors, considering the dynamics of mount designs to be applied with. In this study a generalized FE transient response analysis model, introducing relative displacements, is firstly proposed to accurately predict transient responses of a flexible rotor-bearing system with mount systems to base-transferred shock forces. In the transient analyses the state-space Newmark method of a direct time integration scheme is utilized, which is based on the average velocity concept. Results show that for the identical mount systems considered, the proposed FE-based detailed flexible rotor model yields more reduced transient vibration responses to the same shocks than a conventional simple model or a Jeffcott rotor. Hence, in order to design a rotor-bearing system with a more compact light-weighted mount system, preparing against any potential excessive shock, the proposed FE transient response analysis model herein is recommended.

Sign in / Sign up

Export Citation Format

Share Document