Genetic Algorithms for the Vibroacoustic Optimization of the Stamped Rib in a Plate

Deng, Xiaolong; Zhang, Zongjie; Zhao, Xinze

doi:10.4271/2004-01-1160

Cited by 3 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, some researchers [11], [12], [13] have focused on the numerical optimisation of the acoustic design of a structure, by taking advantage of the increasing capabilities of microprocessors. The proposed methods use optimisation algorithms, such as genetic algorithms, and numerical methods such as the finite element method and/or the boundary element method, to optimise the position and properties of a beam attached onto a plate.…”

Section: Introductionmentioning

confidence: 99%

Radiation efficiency of natural modes of plates with beam stiffeners

Rousounelos

Walsh

Krylov

2008

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

• his onferene pper ws presented t eoustis PHHVD the toint weeting of the eoustil oiety of emeriD the iuropen eoustis essoitionD nd the oi¡ et¡ e prn ise d9eoustiqueF In this paper, the radiation efficiency of the natural modes of finite plates with attached beams is considered. Firstly, the scattering of flexural waves, by the beams and the boundaries, in the plate is considered. The reflection and transmission coefficients along with the near-field coefficients of the beam are used to calculate the vibration field of the plate, by taking into account an infinite number of reflections from the boundaries. A wavenumber transform of the vibration velocity field is used to calculate the sound power and the radiation efficiency. The stiffening beams will shift the resonant frequencies of the plate to higher or lower frequencies depending upon the resonant frequency of the beam. This will also affect the radiation efficiency. From numerical evaluation, it is shown that the beam behaves as an added stiffness for frequencies below the resonant frequency of the beam stiffener whereas for frequencies above this frequency the beam behaves as an added mass.

show abstract

Section: Introductionmentioning

confidence: 99%

Radiation efficiency of natural modes of plates with beam stiffeners

Rousounelos

Walsh

Krylov

2008

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

Non-parametric free-form optimization of shell structures for radiated noise reduction in open sound field

Shimoide

Shimoda²

2014

Transactions of the JSME (In Japanese)

View full text Add to dashboard Cite

This paper describes a parameter-free free-form optimization method for reducing the radiated noise from vibrating shell structures in an open space. Squared sound pressure, which is evaluated by solving fully coupled shell-acoustic interaction system, is selected as the objective function to be minimized. The optimum design problem is formulated as a distributedparameter shape optimization problem under the assumptions that shell structures are varied in the out-of-plane direction to the surface and the thickness is constant. The shape gradient function and the optimality conditions are derived by using the material derivative method, and they are applied to the free-form optimization method for shell, where the shape gradient function is applied to the shell surface as a fictitious distributed force under Robin condition for varying the surface, for minimizing the objective functional and for regularizing the mesh. With this method, the smooth optimal free-form of shell structures are obtained without any shape design parameterization, while minimizing the objective functional. The validity of this method for the radiated noise reduction from vibrating shell structures is verified through design examples. Key Words1.

show abstract

Vibroacoustic Optimization of Two Cross Stamped Ribs in a Plate

Deng

Zhao

2005

SAE Technical Paper Series

View full text Add to dashboard Cite

Genetic Algorithms for the Vibroacoustic Optimization of the Stamped Rib in a Plate

Cited by 3 publications

References 13 publications

Radiation efficiency of natural modes of plates with beam stiffeners

Radiation efficiency of natural modes of plates with beam stiffeners

Non-parametric free-form optimization of shell structures for radiated noise reduction in open sound field

Vibroacoustic Optimization of Two Cross Stamped Ribs in a Plate

Contact Info

Product

Resources

About