Time variant analysis of large scale constrained rotorcraft systems dynamics - An exploitation of IBM-3090 vector-processor's pipe-lining featureA generalized algorithmic procedure is presented for handling the constraints in transmissions, which are treated as a multibody system of interconnected rigid/flexible bodies. The type of constraints are classified based on the interconnection of the bodies, assuming one or more points of contact to exist between them. The method is explained through flow charts and configuration/interaction tables. A significant increase in speed of execution is achieved by vectorizing the developed code in computationally intensive areas. The study of an example consisting of two meshing disks rotating at high angular velocity is carried out. The dynamic behavior of the constraint forces associated with the generalized coordinates of the system are plotted by selecting various modes. Applications are intended for the study of dynamic and subsequent prediction of constraint forces at the gear teeth contacting points in helicopter transmissions with the aim of improving performance dependability.
Document ID
19910065079
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Amirouche, F. M. L. (Illinois Univ. Chicago, IL, United States)
Shareef, N. H. (Illinois Univ. Chicago, IL, United States)
Xie, M. (Illinois, University Chicago, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Subject Category
Mechanical Engineering
Report/Patent Number
AIAA PAPER 91-2745
Meeting Information
Meeting: AIAA Guidance, Navigation and Control Conference