Optimum stiffener design to reduce broadband vibration and sound radiation

Dongjai Lee, Ashok D. Belegundu, Gary H. Koopmann

Research output: Contribution to journalArticlepeer-review


This paper presents a rib-stiffener pattern design method for reducing vibration energy and/or radiated acoustic power from a vibrating structure. Structural dynamics, acoustics and optimization are programmed in a unified code. To avoid difficulties in defining proper design variables such as the location, the number and the size of stiffeners to be attached on a structure, this paper adopts the idea of "topology optimization", based on finite elements. This approach enables one to find an optimal rib-stiffener pattern by using a simple design variable, e.g., the density of finite elements. To illustrate this method, a rectangular plate with clamped edges is optimized to reduce the radiated sound power/kinetic energy and the results are compared to that the same plate but without rib-stiffeners.

Original languageEnglish (US)
Pages (from-to)249-254
Number of pages6
JournalAmerican Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCA
Issue number28
StatePublished - 2001

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Acoustics and Ultrasonics


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