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A Scalar Acoustic Equation for Gases, Liquids, and Solids, Including Viscoelastic Media

Eugen Mamontov ; Viktor Berbyuk (Institutionen för tillämpad mekanik, Dynamik)
Journal of Applied Mathematics and Physics (2327-4352). Vol. 2 (2014), p. 960-970.
[Artikel, refereegranskad vetenskaplig]

The work deals with a mathematical model for real-time acoustic monitoring of material parameters of media in multi-state viscoelastic engineering systems continuously operating in irregular external environments (e.g., wind turbines in cold climate areas, aircrafts, etc.). This monitoring is a high-reliability time-critical task. The work consistently derives a scalar wave PDE of the Stokes type for the non-equilibrium part (NEP) of the average normal stress in a medium. The explicit expression for the NEP of the corresponding pressure and the solution-adequateness condition are also obtained. The derived Stokes-type wave equation includes the stress relaxation time and is applicable to gases, liquids, and solids.

Nyckelord: Acoustic Monitoring, Gas, Liquid, or Solid, Acoustic Equation, Visoelastic Media, Stress Relaxation

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Denna post skapades 2014-10-09. Senast ändrad 2015-12-17.
CPL Pubid: 203998


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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik


Strömningsmekanik och akustik

Chalmers infrastruktur