An Adjoint Operator Approach for Sensitivity Analysis of Radiated Sound Power in Fully Coupled Structural-Acoustic Systems

Leilei Chen, Steffen Marburg, Haibo Chen, Hao Zhang, Hongbo Gao

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Full interaction between structural and fluid domains must be considered for light structures immersed in heavy fluid (e.g. thin steel shells in water). The structural-acoustic design sensitivity analysis provides information on the effect of the design variable on acoustic performance, which makes it a key step for noise control and structural-acoustic optimization. This study uses the finite element method (FEM) to model the structure domain, while the fast multipole boundary element method (BEM) is applied to the exterior acoustic domain. An adjoint operator approach is developed to calculate the sensitivity of the radiated sound power with respect to the design variables, which can be any structural or fluid parameter (e.g. fluid or structural density, Poisson's ratio, Young's modulus, and geometric measures). Numerical examples are presented to demonstrate the validity and efficiency of the proposed algorithm.

Original languageEnglish
Article number1750003
JournalJournal of Computational Acoustics
Volume25
Issue number1
DOIs
StatePublished - 1 Mar 2017

Keywords

  • FE/FMBE coupling
  • Fluid-structure interaction
  • adjoint operator approach
  • design sensitivity analysis

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