Sandwich structures that are embedded with cellular materials show excellent performance in terms of mechanics, electromagnetics, and acoustics. In this paper, sandwich panels with hybrid cellular cores of hexagonal, re-entrant hexagonal, and rectangular configurations along the panel surface are designed. The spectral element method (SEM) is applied to accurately predict the dynamic performance of the sandwich panels with a reduced number of elements and the system scale within a wide frequency range. The mechanical performance and the acoustic performance at normal incidence of the proposed structures are investigated and compared with conventional honeycomb panels with fixed cell geometries. It was found that the bending stiffness, fundamental frequencies, and sound transmission loss (STL) of the presented sandwich panels can be effectively changed by adjusting their hybrid cellular core configurations. Shape optimization designs of a hybrid cellular core for maximum STL are presented for specified tonal and frequency band cases at normal incidence. Hybrid sandwich panels increase the sound insulation property by 24.7%, 20.6%, and 109.6% for those cases, respectively, compared with conventional panels in this study. These results indicate the potential of sandwich structures with hybrid cellular cores in acoustic attenuation applications. Hybrid cellular cores can lead to inhomogeneous mechanical performance and constitute a broader platform for the optimum mechanical and acoustic design of sandwich structures.
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December 2018
Research-Article
Mechanical and Acoustic Performance of Sandwich Panels With Hybrid Cellular Cores
Qing Li,
Qing Li
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan Road,
Shanghai 200240, China
e-mail: liqing5504@sjtu.edu.cn
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan Road,
Shanghai 200240, China
e-mail: liqing5504@sjtu.edu.cn
Search for other works by this author on:
Deqing Yang
Deqing Yang
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan RoadZ,
Shanghai 200240, China
e-mail: yangdq@sjtu.edu.cn
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan RoadZ,
Shanghai 200240, China
e-mail: yangdq@sjtu.edu.cn
Search for other works by this author on:
Qing Li
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan Road,
Shanghai 200240, China
e-mail: liqing5504@sjtu.edu.cn
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan Road,
Shanghai 200240, China
e-mail: liqing5504@sjtu.edu.cn
Deqing Yang
State Key Laboratory of Ocean Engineering,
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan RoadZ,
Shanghai 200240, China
e-mail: yangdq@sjtu.edu.cn
Collaborative Innovation Center for Advanced
Ship and Deep-Sea Exploration,
School of Naval Architecture,
Ocean and Civil Engineering,
Shanghai Jiao Tong University,
800 Dongchuan RoadZ,
Shanghai 200240, China
e-mail: yangdq@sjtu.edu.cn
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received February 2, 2018; final manuscript received June 1, 2018; published online July 5, 2018. Assoc. Editor: Stefano Gonella.
J. Vib. Acoust. Dec 2018, 140(6): 061016 (15 pages)
Published Online: July 5, 2018
Article history
Received:
February 2, 2018
Revised:
June 1, 2018
Citation
Li, Q., and Yang, D. (July 5, 2018). "Mechanical and Acoustic Performance of Sandwich Panels With Hybrid Cellular Cores." ASME. J. Vib. Acoust. December 2018; 140(6): 061016. https://doi.org/10.1115/1.4040514
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