A two-stage numerical model is developed to understand the energy transmission characteristics through a finite double-leaf structure placed in an infinite baffle subjected to an external excitation and subsequently the sound radiation behavior of the same into the semi-infinite receiving side. In the first stage, a mobility-based coupled finite element–boundary element (FE–BE) technique is implemented to model the energy transmission from the primary panel to the secondary panel through an air gap. In the second stage, a separate boundary element (BE)-based model is developed to estimate the sound power radiated by the radiating (secondary) panel into the receiving side which is assumed to be semi-infinite. The advantage of the proposed approach is that it is sufficient to mesh the structural panels alone, thereby reducing the problem dimensions and the difficulty in modeling. Moreover, the developed model can be easily implemented for structures made up of various constituent materials (isotropic or laminated composites) with complex boundary conditions and varying panel geometries. Numerical experiments are carried out for different material models by varying air-gap thicknesses and also by introducing alternate energy transmission path in terms of mechanical links and the obtained results are discussed.
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August 2017
Research-Article
A Two-Stage Model for Energy Transmission and Radiation Analysis of Laminated Composite Double-Leaf Structures
Atanu Sahu,
Atanu Sahu
Mem. ASME
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: atanush@gmail.com
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: atanush@gmail.com
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Arup Guha Niyogi,
Arup Guha Niyogi
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: agn_ju@yahoo.com
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: agn_ju@yahoo.com
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Michael Rose,
Michael Rose
Institute of Composite Structures and Adaptive Systems,
German Aerospace Center (DLR),
Lilienthalplatz 7,
Braunschweig 38108, Germany
e-mail: michael.rose@dlr.de
German Aerospace Center (DLR),
Lilienthalplatz 7,
Braunschweig 38108, Germany
e-mail: michael.rose@dlr.de
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Partha Bhattacharya
Partha Bhattacharya
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: p_bhatta@daad-alumni.de
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: p_bhatta@daad-alumni.de
Search for other works by this author on:
Atanu Sahu
Mem. ASME
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: atanush@gmail.com
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: atanush@gmail.com
Arup Guha Niyogi
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: agn_ju@yahoo.com
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: agn_ju@yahoo.com
Michael Rose
Institute of Composite Structures and Adaptive Systems,
German Aerospace Center (DLR),
Lilienthalplatz 7,
Braunschweig 38108, Germany
e-mail: michael.rose@dlr.de
German Aerospace Center (DLR),
Lilienthalplatz 7,
Braunschweig 38108, Germany
e-mail: michael.rose@dlr.de
Partha Bhattacharya
Department of Civil Engineering,
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: p_bhatta@daad-alumni.de
Jadavpur University,
188, Raja S. C. Mallik Road,
Kolkata 700032, India
e-mail: p_bhatta@daad-alumni.de
1Corresponding author.
Contributed by the Noise Control and Acoustics Division of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received August 20, 2016; final manuscript received March 17, 2017; published online May 30, 2017. Assoc. Editor: Ronald N. Miles.
J. Vib. Acoust. Aug 2017, 139(4): 041008 (13 pages)
Published Online: May 30, 2017
Article history
Received:
August 20, 2016
Revised:
March 17, 2017
Citation
Sahu, A., Niyogi, A. G., Rose, M., and Bhattacharya, P. (May 30, 2017). "A Two-Stage Model for Energy Transmission and Radiation Analysis of Laminated Composite Double-Leaf Structures." ASME. J. Vib. Acoust. August 2017; 139(4): 041008. https://doi.org/10.1115/1.4036390
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