Dupere, IDJ and Lu, T and Dowling, AP (2007) *Microstructural optimization of cellular acoustic materials.* Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University, 41. pp. 1251-1256. ISSN 0253-987X

## Abstract

A microstructure based acoustic model is introduced, which can be used to optimize the microstructure of cellular materials and thus to obtain their optimal acoustic property. This acoustic model is an unsteady one which is appropriate in the limit of low Reynolds numbers. The model involves three elements. This first involves the propagation of acoustic waves passing the cylinders whose axes are aligned parallel to the direction of propagation. The second model relates to the propagation of acoustic waves passing the cylinders whose axes are aligned perpendicular to the direction of propagation. In both cases the interaction between adjacent cylinders is taken into account by considering the effect of polygonal periodic boundary conditions. As these two models are linear they are combined to give the characteristics of propagation at arbitrary incidence. The third model involves propagation passing spheres in order to represent the joints. Heat transfer is also included. These three models are then used to expand the design space and calculate the optimum cell structure for desired acoustic performance in a number of different applications. Moreover, the application fields are also analyzed.

Item Type: | Article |
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Uncontrolled Keywords: | Acoustic model Cellular material Design optimization Periodic boundary condition Sound absorption |

Subjects: | UNSPECIFIED |

Divisions: | Div A > Fluid Mechanics |

Depositing User: | Cron job |

Date Deposited: | 04 Feb 2015 22:28 |

Last Modified: | 05 Feb 2015 07:35 |

DOI: |