D
D.J. Johns
Researcher at Loughborough University
Publications - 9
Citations - 396
D.J. Johns is an academic researcher from Loughborough University. The author has contributed to research in topics: Vibration & Shell (structure). The author has an hindex of 8, co-authored 9 publications receiving 380 citations.
Papers
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Journal ArticleDOI
Wake interaction experiments with two flexible circular cylinders in flowing water
R. King,D.J. Johns +1 more
TL;DR: In this article, the wake interaction effects between two identical flexible circular cylinders in flowing water were examined and the stability of the two cylinders was explained by reference to oscillatory mode shapes and from considerations of two possible types of vortex shedding (symmetric and alternate).
Journal ArticleDOI
On vortex excitation of model piles in water
R. King,M.J. Prosser,D.J. Johns +2 more
TL;DR: In this article, a brief review of some of the relevant published literature is followed by a presentation and discussion of the experimental results obtained from the tests at BHRA, and possible mechanisms of excitation and stability criteria are proposed.
Journal ArticleDOI
Vibration characteristics of a clamped-free and clamped-ring-stiffened circular cylindrical shell
C.B. Sharma,D.J. Johns +1 more
TL;DR: In this article, a theoretical analysis for the free vibration of clamped-free and clampedring-stiffened cylindrical shells has been developed and programmed for digital computer solution.
Journal ArticleDOI
Vibration of a square plate symmetrically supported at four points
D.J. Johns,R. Nataraja +1 more
TL;DR: In this article, it is shown that the finite difference formulation of the governing fourth-order differential equation yields results of acceptable accuracy which converge to the exact values of the natural frequencies from below.
Journal ArticleDOI
On the fundamental frequency of a square plate symmetrically supported at four points
D.J. Johns,V.T. Nagaraj +1 more
TL;DR: In this paper, an alternative finite difference formulation of the governing differential equation of the title problem was proposed, which was used over the entire range of symmetric supports (viz. four-corner supports to one single central support).