Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Vibration of Initially Stressed Beam with Discretely Spaced Multiple Elastic Supports

  • Park, Nam-Gyu (Nuclear Fuel Design Dep., KEPCO Nuclear Fuel Co. LTD.) ;
  • Lee, Seong-Ki (Nuclear Fuel Design Dep., KEPCO Nuclear Fuel Co. LTD.) ;
  • Kim, Hyeong-Koo (Nuclear Fuel Design Dep., KEPCO Nuclear Fuel Co. LTD.) ;
  • Park, Ki-Sung (Nuclear Fuel Design Dep., KEPCO Nuclear Fuel Co. LTD.)
  • Published : 2004.05.01
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Abstract

Vibration behavior of an initially stressed beam on discretely spaced multiple elastic supports has been studied and a theoretical formulation of the system is derived using the variational principle. Unlike beams on an elastic foundation, discretely spaced supports can distort the beam mode shapes when the supports have rather large stiffness, i.e. usually expected beam modes cannot be obtained, but rather irregular mode shapes are observed. Conversely, irregular modes can be recovered by changing initial stress. Since support location is closely associated with the dynamic characteristics, this work also discusses eigenvalue sensitivity with respect to the support position and some numerical examples are investigated to illustrate the above findings.

Keywords

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