NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
NASTRAN forced vibration analysis of rotating cyclic structuresTheoretical aspects of a new capability developed and implemented in NASTRAN level 17.7 to analyze forced vibration of a cyclic structure rotating about its axis of symmetry are presented. Fans, propellers, and bladed shrouded discs of turbomachines are some examples of such structures. The capability includes the effects of Coriolis and centripetal accelerations on the rotating structure which can be loaded with: (1) directly applied loads moving with the structure and (2) inertial loas due to the translational acceleration of the axis of rotation (''base' acceleration). Steady-state sinusoidal or general periodic loads are specified to represent: (1) the physical loads on various segments of the complete structure, or (2) the circumferential harmonic components of the loads in (1). The cyclic symmetry feature of the rotating structure is used in deriving and solving the equations of forced motion. Consequently, only one of the cyclic sectors is modelled and analyzed using finite elements, yielding substantial savings in the analysis cost. Results, however, are obtained for the entire structure. A tuned twelve bladed disc example is used to demonstrate the various features of the capability.
Document ID
19840021183
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Elchuri, V. (Textron Bell Aerospace Co. Buffalo, NY, United States)
Smith, G. C. C. (Textron Bell Aerospace Co. Buffalo, NY, United States)
Gallo, A. M. (Textron Bell Aerospace Co. Buffalo, NY, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1983
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.26:173821
NASA-CR-173821
Meeting Information
Meeting: ASME Conf. on Mech. Vibration and Noise
Location: Dearborn, MI
Country: United States
Start Date: September 1, 1983
Accession Number
84N29252
Funding Number(s)
CONTRACT_GRANT: NAS3-22533
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available