by National Aeronautics and Space Administration, Ames Research Center, National Technical Information Service, distributor in Moffett Field, CA, [Springfield, Va .
Written in English
|Statement||V.R. Murthy, principal investigator|
|Series||NASA contractor report -- NASA CR-177098|
|Contributions||Ames Research Center|
|The Physical Object|
Get this from a library! Linear and nonlinear dynamic analysis of redundant load path bearingless rotor systems. [V R Murthy; Ames Research Center.]. Saturation pressure is set to 20 kPa in both, linear and nonlinear, analyses. Dynamic analysis. Equations of motion are solved in the linear and nonlinear analyses to obtain journal orbits: (4) m x ¨ = F x + m ξ Ω 2 sin Ωt m y ¨ = F y + m ξ Ω 2 cos Ωt − WCited by: Linear Static versus Linear Dynamic Analysis. In linear static analysis, the loads are applied gradually and slowly until they reach their full reaching their full magnitude, the loads remain constant (time-invariant). The accelerations and velocities of the excited system are negligible, therefore, no inertial and damping forces are considered in the formulation. In this paper, the non-linear dynamic analysis of an unbalanced rotor supported by roller bearings has been made. The non-linearity in the rotor bearing system is due to Hertzian contact, unbalanced rotor effect and radial internal clearance. The system can excite bi-periodically by the varying compliance frequency and the rotational by:
structural twist, and of the redundant load carrying features of the bearing- less rotor. Although developed in response to the requirements of composite bearingless rotors, the dynamic equations are sufficiently general for valid application to all conventional rotor systems: articulated, semiarticulated,File Size: 5MB. I bought this book to self-learn rotor-dynamics for a job. Many of the concepts in this book are very well throughout and described. In other words, the authors do not loose me in technical jargon in the book. However, in this book there are several typos which undermine some the credibility of this by: Dynamic analysis of bearingless tail rotor blades based on nonlinear shell modes Article (PDF Available) in Journal of Aircraft 31(6) November with . The nonlinear dynamic responses of an unbalanced rigid rotor-bearing system were also studied by Tiwari et al.  and Harsha . The effects of the preload and number of .
An analytical model of a tilting pad bearing was developed based on the short bearing assumption with the turbulence effect included. In order to determine its influence on the dynamic behavior of the rotor, this model was compared against one without the turbulence effect through a simulation of a Jeffcott/Laval rotor supported by a couple of by: A finite element model considering the shear effect and gyroscopic effect is developed to study the linear and nonlinear dynamic behavior of two-rotor three-bearing system named N+1 configuration with rub-impact in this paper. The influence of rotational speed, eccentric condition, and the stiffness of coupling on the dynamic behavior of N+1 configuration and the Author: Jianfei Yao, Jinji Gao, Ya Zhang, Weimin Wang. Nonlinear dynamic analysis for high speed gear-rotor-bearing system of the large scale wind turbine Shihua Zhou1, Guiqiu Song2, Mengnan Sun3, Zhaohui Ren4 School of Mechanical Engineering and Automation, Northeastern University, Cited by: 2. establishments to develop a bearing less main rotor. Though a bearing less rotor is mechanically simple, its dynamic analysis becomes very complicated because of multiple load paths, presence of non-linear electrometric damper and existence of kinematic constraint at the pitch link. With the consolidation of rotor blade structural dynamic andFile Size: 35KB.