This study examines wave attenuation and power flow characteristics of sandwich beams with internal absorbers. Two types of absorbing systems embedded in the core are considered, namely, a conventional spring-mass-dashpot system having a mass with a spring and a dashpot in parallel, and a relaxation system containing an additional relaxation spring added in series with the dashpot. Analytical continuum models used for interpreting the attenuation behavior of sandwich structures are presented. Through the analysis of the power flowing into the structure, the correlation of wave attenuation and energy blockage is revealed. The reduction in the power flow indicates that some amount of energy produced by the external force can be effectively obstructed by internal absorbers. The effects of parameters on peak attenuation, bandwidth, and power flow are also studied.
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August 2014
Research-Article
Wave Propagation and Power Flow Analysis of Sandwich Structures With Internal Absorbers
J. S. Chen,
J. S. Chen
1
Department of Engineering Science,
e-mail: jschen273@mail.ncku.edu.tw
National Cheng Kung University
,No. 1, University Road
,Tainan 701
, Taiwan
e-mail: jschen273@mail.ncku.edu.tw
1Corresponding author.
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R. T. Wang
R. T. Wang
Department of Engineering Science,
National Cheng Kung University
,No. 1, University Road
,Tainan 701
, Taiwan
Search for other works by this author on:
J. S. Chen
Department of Engineering Science,
e-mail: jschen273@mail.ncku.edu.tw
National Cheng Kung University
,No. 1, University Road
,Tainan 701
, Taiwan
e-mail: jschen273@mail.ncku.edu.tw
R. T. Wang
Department of Engineering Science,
National Cheng Kung University
,No. 1, University Road
,Tainan 701
, Taiwan
1Corresponding author.
Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received July 15, 2013; final manuscript received March 20, 2014; published online April 18, 2014. Assoc. Editor: Liang-Wu Cai.
J. Vib. Acoust. Aug 2014, 136(4): 041003 (8 pages)
Published Online: April 18, 2014
Article history
Received:
July 15, 2013
Revision Received:
March 20, 2014
Citation
Chen, J. S., and Wang, R. T. (April 18, 2014). "Wave Propagation and Power Flow Analysis of Sandwich Structures With Internal Absorbers." ASME. J. Vib. Acoust. August 2014; 136(4): 041003. https://doi.org/10.1115/1.4027294
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