Vibration and sound radiation from a sandwich cylindrical shell with prismatic core

Sang Min Jeong; Massimo Ruzzene

doi:10.1117/12.540351

29 July 2004 Vibration and sound radiation from a sandwich cylindrical shell with prismatic core

Sang Min Jeong, Massimo Ruzzene

Proceedings Volume 5386, Smart Structures and Materials 2004: Damping and Isolation; (2004) https://doi.org/10.1117/12.540351
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

The vibration and the sound radiation of cylindrical shells with cellular core is here analyzed. The considered structure is composed of a repeated unit cell and can be classified as a Linear Cellular Alloy (LCA) core. The unit cells are of a tetrahedral configuration, arranged according to a honeycomb lay-out. The considered configuration has previously been proposed for core designs of sandwich beams with superior structural properties. In here, the effects of the core configuration on the structural-acoustic behavior of the considered sandwich shell is investigated through a FE model. The FE model is created with ANSYS, a commercially available Finite Element Analysis (FEA) package. The sensitivity of the shell's dynamic characteristics to changes in the geometric properties of the core is investigated. An optimization problem is formulated to determine the core configuration which minimizes, within a target frequency range, the sound radiation of the shell in an unbounded fluid environment.

Citation Download Citation

Sang Min Jeong and Massimo Ruzzene "Vibration and sound radiation from a sandwich cylindrical shell with prismatic core", Proc. SPIE 5386, Smart Structures and Materials 2004: Damping and Isolation, (29 July 2004); https://doi.org/10.1117/12.540351

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