Browse > Article
http://dx.doi.org/10.5050/KSNVN.2009.19.5.537

Semi-finite Element Analysis of Rotating Disks Reinforced at Rim  

Koo, Kyo-Nam (울산대학교 항공우주공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.19, no.5, 2009 , pp. 537-544 More about this Journal
Abstract
In order to increase the critical speed of rotating disks of which functional material could not be changed such as in optical and magnetic data storage disks, a new disk with a rim reinforced by composite material is proposed and its concept is verified by numerical analysis. Stress distributions are found for the rotating disk composed of two annular disks of which materials are isotropic inside and orthotropic outside. Dynamic equation is formulated in order to calculate the natural frequency and critical speed. For the solution of lateral vibration, a rotational symmertry condition is applied along circumferential direction and a finite element interpolation with Hermite polynomial is performed along the radial direction to obtain a proper solution. According to the results, reinforcing a disk at rim makes critical speeds drastically increased, and induces a buckling phenomenon in mode (0,0) which occurs over the lowest critical speed.
Keywords
Critical Speed; Vibration; Composite Materials; Rotating Disk; Finite Element; Rim Reinforcement;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Koo, K. N., 2006, “Vibration Analysis and Critical Speeds of Rotating Polar Orthotropic Disks, Part I: Formulation and Solution Method,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 2, pp. 169-175   DOI   ScienceOn
2 Koo, K. N., 2006, “Vibration Analysis and Critical Speeds of Rotating Polar Orthotropic Disks, Part II : Analysis Results,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 3, pp. 247-254   DOI   ScienceOn
3 Koo, K. N., 2006, “Stress and Vibration Analysis of Rotating Laminated Composite Disks,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 9, pp. 982-989   DOI   ScienceOn
4 Kirkhope, J. and Wilson, G. J., 1976, “Vibration and Stress Analysis of Thin Rotating Discs Using Annular Finite Elements,” Journal of Sound and Vibration, Vol. 44, No. 4, pp. 461-474   DOI   ScienceOn
5 Virgin, L. N., 2007, Vibration of Axially Loaded Structures, Cambridge University Press, New York
6 http://www.optware.co.jp/english/index_tech.htm
7 Koo, K. N., 2005, “In-plane Stress Analysis of Rotating Composite Disks,” Journal of the Korean Society for Composite Materials, Vol. 18, No. 4, pp.8-13