Dynamics of a cylindrical shell system coupled by viscous fluid

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · J. Acoust. Soc. Am.; (United States)

DOI:https://doi.org/10.1121/1.381523· OSTI ID:7100851

Yeh, T T; Chen, S S

This study was motivated by the need to design the thermal shield in reactor internals and other system components to avoid detrimental flow-induced vibrations. The system component is modeled as two coaxial shells separated by a viscous fluid. In the analysis, Fluegge's shell equations of motion and linearized Navier--Stokes equation for viscous fluid are employed. First, a traveling-wave-type solution is taken for shells and fluid. Then, from the interface conditions between the shells and fluid, the solution for the fluid medium is expressed in terms of shell displacements. Finally, using the shell equations of motion gives the frequency equation, from which the natural frequency, mode shape, and modal damping ratio of coupled modes can be calculated. The analytical results show a fairly good qualitative agreement with the published experimental data. With the presented analysis and results, the frequency and damping characteristics can be analyzed and design parameters can be related to frequency and damping.

• Research Organization: Components Technology Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
• OSTI ID: 7100851
• Journal Information: J. Acoust. Soc. Am.; (United States), Journal Name: J. Acoust. Soc. Am.; (United States) Vol. 62:2; ISSN JASMA
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
DAMPING
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
FLUID FLOW
MECHANICAL VIBRATIONS
NAVIER-STOKES EQUATION
REACTOR COMPONENTS
REACTOR INTERNALS
SHELLS
SHIELDS
THERMAL SHIELDS
VISCOUS FLOW