Stability Analysis of Rotor-Bearing Systems Using Component Mode Synthesis

1980 ◽  
Vol 102 (2) ◽  
pp. 352-359 ◽  
Author(s):  
D. A. Glasgow ◽  
H. D. Nelson
Keyword(s):  
Stability Analysis ◽  
General Problem ◽  
Component Mode Synthesis ◽  
Internal Coordinates ◽  
System Equations ◽  
Speed Stability ◽  
Whirl Speed ◽  
Comparative Results ◽  
Rotor Bearings ◽  
Mode Truncation

A method of component mode synthesis is presented for the analysis of multishaft rotor-bearings systems. The motion of each component of the system is described as the superposition of constraint modes associated with boundary coordinates and constrained precessional modes associated with internal coordinates. The constrained precessional modes for each component are truncated and the reduced component equations are assembled to yield a set of system equations. The nonsymmetric nature of the general problem requires the utilization of biorthogonality relations between right and left vector sets in order to decouple the component precessional modes. The method is developed for damped whirl speed/stability analysis and comparative results are presented for various levels of mode truncation for two example systems.

scholarly journals Transient Analysis of Rotor-Bearing Systems Using Component Mode Synthesis

1981 ◽  
Author(s):  
H. D. Nelson ◽  
W. L. Meacham
Keyword(s):  
Transient Analysis ◽  
Forced Response ◽  
Component Mode Synthesis ◽  
System Response ◽  
Reduced Order ◽  
Fixed Frame ◽  
Rotor Bearing ◽  
System Equations ◽  
Comparative Results ◽  
Mode Truncation

A method of component mode synthesis is utilized to determine the forced response of linear multi-shaft rotor-bearing systems. The formulation allows for simulation of system response due to blade loss, base shock, maneuver loads, and specified fixed frame forces. The motion of each rotating component of the system is described by superposing constraint modes associated with boundary coordinates and constrained precessional modes associated with internal coordinates. The precessional modes are truncated for each component and the reduced component equations are assembled to obtain a set of complex system equations of reduced order. The method allows for nonsymmetric effects and comparative results are presented for various levels of mode truncation for two example cases.

Nonlinear Analysis of Rotor-Bearing Systems Using Component Mode Synthesis

1983 ◽  
Vol 105 (3) ◽  
pp. 606-614 ◽  
Author(s):  
H. D. Nelson ◽  
W. L. Meacham ◽  
D. P. Fleming ◽  
A. F. Kascak
Keyword(s):  
Forced Response ◽  
Component Mode Synthesis ◽  
Squeeze Film ◽  
System Response ◽  
Reduced Order ◽  
Squeeze Film Dampers ◽  
Rotor Bearing ◽  
System Equations ◽  
Transient System ◽  
Blade Loss

The method of component mode synthesis is developed to determine the forced response of nonlinear, multishaft, rotor-bearing systems. The formulation allows for simulation of system response due to blade loss, distributed unbalance, base shock, maneuver loads, and specified fixed frame forces. The motion of each rotating component of the system is described by superposing constraint modes associated with boundary coordinates and constrained precessional modes associated with internal coordinates. The precessional modes are truncated for each component and the reduced component equations are assembled with the nonlinear supports and interconnections to form a set of nonlinear system equations of reduced order. These equations are then numerically integrated to obtain the system response. A computer program, which is presently restricted to single shaft systems has been written and results are presented for transient system response associated with blade loss dynamics, with squeeze film dampers, and with interference rubs.

Vehicle High Speed Stability Analysis throughIntegrated Control

2018 ◽  
Author(s):  
Nur Alyani Nadhiya ◽  
Fitri Yakub ◽  
Hatta Ariff ◽  
Azizul Azizan ◽  
Zainuddin A. Rasit ◽  
...  
Keyword(s):  
Stability Analysis ◽  
High Speed ◽  
Speed Stability

Low-speed stability analysis of the dual fuel waverider configuration

1996 ◽  
Author(s):  
Christopher Tarpley ◽  
Darryll Pines ◽  
Ajay Kothari
Keyword(s):  
Stability Analysis ◽  
Dual Fuel ◽  
Low Speed ◽  
Speed Stability
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