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Discrete Material Optimization of Vibrating Laminated Composite Plates for Minimum Sound Emission

  • Niels Olhoff
  • Bin Niu
Part of the CISM International Centre for Mechanical Sciences book series (CISM, volume 549)

Abstract

This paper deals with vibro-acoustic optimization of laminated composite plates without damping. The vibration is excited by time-harmonic external mechanical loading with prescribed frequency and amplitude, and the design objective is to minimize the total sound power radiated from the surface of the laminated plate to the surrounding acoustic medium. Instead of solving the Helmholtz equation for evaluation of the sound power, advantage is taken of the fact that the surface of the laminated plate is flat, which implies that Rayleigh’s integral approximation can be used to evaluate the sound power radiated from the surface of the plate. The novel Discrete Material Optimization (DMO) formulation has been applied to achieve the design optimization of fiber angles, stacking sequence and selection of material for laminated composite plates. Several numerical examples are presented in order to illustrate this approach.

Keywords

Topology Optimization Excitation Frequency Laminate Plate Sandwich Plate Laminate Composite Plate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© CISM, Udine 2014

Authors and Affiliations

  • Niels Olhoff
    • 1
  • Bin Niu
    • 1
  1. 1.Department of Mechanical and Manufacturing EngineeringAalborg UniversityAalborg EastDenmark

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