A topology optimization based approach is proposed to study the optimal configuration of stiffeners for the interior sound reduction. Since our design target is aimed at reducing the low frequency noise, a coupled acoustic-structural conservative system without damping effect is considered. Modal analysis method is used to evaluate the interior sound level for this coupled system. To formulate the topology optimization problem, a recently introduced Microstructure-based Design Domain Method (MDDM) is employed. Using the MDDM, the optimal stiffener configurations problem is treated as a material distribution problem and sensitivity analysis of the coupled system is derived analytically. The norm of acoustic excitation is used as the indicator of the interior sound level. The optimal stiffener design is obtained by solving this topology optimization problem using a sequential convex approximation method. Examples of acoustic box under single frequency excitation and a band of low frequency excitations are presented and discussed.
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July 2003
Technical Papers
Optimal Stiffener Design for Interior Sound Reduction Using a Topology Optimization Based Approach
Jianhui Luo,
Jianhui Luo
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08855
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Hae Chang Gea
Hae Chang Gea
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08855
Search for other works by this author on:
Jianhui Luo
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08855
Hae Chang Gea
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08855
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received June 1997; Revised October 2002. Associate Editor: R. L. Clark.
J. Vib. Acoust. Jul 2003, 125(3): 267-273 (7 pages)
Published Online: June 18, 2003
Article history
Received:
June 1, 1997
Revised:
October 1, 2002
Online:
June 18, 2003
Citation
Luo , J., and Gea, H. C. (June 18, 2003). "Optimal Stiffener Design for Interior Sound Reduction Using a Topology Optimization Based Approach ." ASME. J. Vib. Acoust. July 2003; 125(3): 267–273. https://doi.org/10.1115/1.1569512
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