Experimental investigation on vibration and acoustic similarity of stiffened cylindrical shells

DOI

10.2991/iceep-18.2018.54How to use a DOI?

Keywords

vibration, acoustics, similarity, siffened cylindrical shells.

Abstract

The employment of similitude theory to establish similarity among structural-acoustic systems can save considerable expense and time, provided that the proper scaling laws are found and validated. In this study the scaling laws for structural-acoustic systems are developed and validated. The stiffened cylindrical shells of the model and prototype are fabricated, and their frequency response functions (FRFs) of acceleration and sound pressure subjected to a random excitation are measured in a semi-anechoic chamber. The difficulty of making completely similar structures often leads to certain types of relaxations and distortions between the model and prototype. In order to overcome this problem, the equivalent thickness of stiffened shells and the non-dimensional quantities, including non-dimensional frequency and non-dimensional FRFs are introduced. The obtained results show that the FRFs of the model and prototype closely resemble each other compared throughout the frequency range and the scaling laws provide precise relationship between a full-scale prototype and its small-scale equivalent model.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Bin Fang
AU  - Hanqin Li
AU  - Zhemin Jin
PY  - 2018/09
DA  - 2018/09
TI  - Experimental investigation on vibration and acoustic similarity of stiffened cylindrical shells
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 315
EP  - 320
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.54
DO  - 10.2991/iceep-18.2018.54
ID  - Fang2018/09
ER  -