Influence of a rigid coaxial core on the stress–strain state of a submerged fluid-filled circular cylindrical shell subjected to a shock wave

• Published in: Journal of fluids and structures 2004-08, Vol.19 (7), p.957-984
• Main Author: Iakovlev, S.
• Format: Article
• Language: English
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
• ISSN: 0889-9746; 1095-8622
• DOI: 10.1016/j.jfluidstructs.2004.05.003

A submerged fluid-filled circular cylindrical shell containing a rigid coaxial cylindrical core is considered. The nonstationary dynamics of such a system subjected to an external spherical shock wave is examined, with particular emphasis on the influence that a core has on the stress–strain state of the shell. A complete diffraction–radiation problem is considered, and an analytical–numerical solution of the problem is obtained. The influence of several different cores is analyzed, and a comparison to the case of a shell without a core is presented. Physical phenomena occurring in the shell and in the internal fluid are studied in detail. Two- and three-dimensional graphics is used to illustrate and analyze the nonstationary dynamics of the stress–strain state. The possibility of using a rigid core as a measure of constructive safety improvement is discussed.