Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/58153
Title: Dynamic stability of spinning pre-twisted beams
Authors: Lee, H.P. 
Issue Date: Sep-1994
Source: Lee, H.P. (1994-09). Dynamic stability of spinning pre-twisted beams. International Journal of Solids and Structures 31 (18) : 2509-2517. ScholarBank@NUS Repository.
Abstract: The equations of motion of a spinning pre-twisted beam are formulated using Euler beam theory and the assumed mode method. The equations of motion are then transformed to the standard form of an eigen-value problem for determining the critical spinning speeds corresponding to the divergence behavior of the spinning beam. The effects of pre-twist angle and aspect ratio of the rectangular cross-section of the beam on its stability are investigated. Detailed numerical simulations show that the unstable spinning speed zones for a pre-twisted beam of a given aspect ratio of the cross-section do not become narrower with increased pre-twist angle. The main reason is that for a pre-twisted beam, the critical spinning speeds corresponding to divergence behaviors are no longer the dividing points for separating the speed zones into stable and unstable regions. This type of stability behavior of a pre-twisted beam is different from the stability behavior of a spinning beam without any pre-twisting. Such a spinning beam without pre-twisting is found to have distinct regions of stable and unstable spinning speed zones separated by critical spinning speeds. © 1994.
Source Title: International Journal of Solids and Structures
URI: http://scholarbank.nus.edu.sg/handle/10635/58153
ISSN: 00207683
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

29
checked on Feb 23, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.