Partitioned Coupling for Structural Acoustics

Bunting, Gregory; Miller, Scott T.

doi:10.1115/1.4045215

Partitioned Coupling for Structural Acoustics

Journal Article · Sun Nov 17 23:00:00 EST 2019 · Journal of Vibration and Acoustics

DOI:https://doi.org/10.1115/1.4045215· OSTI ID:1574491

Bunting, Gregory ^[1]; Miller, Scott T. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Computational Solid Mechanics and Structural Dynamics

Here, we expand the second-order fluid–structure coupling scheme of Farhat et al. (1998, “Load and Motion Transfer Algorithms for 19 Fluid/Structure Interaction Problems With Non-Matching Discrete Interfaces: Momentum and Energy Conservation, Optimal Discretization and Application to Aeroelasticity,” Comput. Methods Appl. Mech. Eng., 157(1–2), pp. 95–114; 2006, “Provably Second-Order Time-Accurate Loosely-Coupled Solution Algorithms for Transient Nonlinear Computational Aeroelasticity,” Comput. Methods Appl. Mech. Eng., 195(17), pp. 1973–2001) to structural acoustics. The staggered structural acoustics solution method is demonstrated to be second-order accurate in time, and numerical results are compared to a monolithically coupled system. The partitioned coupling method is implemented in the Sierra Mechanics software suite, allowing for the loose coupling of time domain acoustics in SIERRA/SD to structural dynamics (SIERRA/SD) or solid mechanics (SIERRA/SD). The coupling is demonstrated to work for nonconforming meshes. Results are verified for a one-dimensional piston, and the staggered and monolithic results are compared to an exact solution. Huang, H. (1969, “Transient Interaction of Plane Acoustic Waves With a Spherical Elastic Shell,” J. Acoust. Soc. Am., 45(3), pp. 661–670) sphere scattering problem with a spherically spreading acoustic load demonstrates parallel capability on a complex problem. Our numerical results compare well for a bronze plate submerged in water and sinusoidally excited (Fahnline and Shepherd, 2017, “Transient Finite Element/Equivalent Sources Using Direct Coupling and Treating the Acoustic Coupling Matrix as Sparse,” J. Acoust. Soc. Am., 142(2), pp. 1011–1024).

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000; NA0003525

OSTI ID:: 1574491

Alternate ID(s):: OSTI ID: 1575265

Report Number(s):: SAND2019--12871J; 680686

Journal Information:: Journal of Vibration and Acoustics, Journal Name: Journal of Vibration and Acoustics Journal Issue: 1 Vol. 142; ISSN 1048-9002

Publisher:: The American Society of Mechanical Engineers (ASME)Copyright Statement

Country of Publication:: United States

Language:: English

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