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Single- and multi-objective shape design of Y-noise barriers using evolutionary computation and boundary elements. (English) Zbl 1182.65097

Summary: The optimum shape design of Y-noise barriers is carried out using single and multi-objective evolutionary algorithms and the boundary element method (BEM). Reduction of noise impact efficiency (using the insertion loss-IL-magnitude) and cost of the barrier (using its total length magnitude) are considered. A two-dimensional problem of sound propagation in the frequency domain is handled, defined by a fixed position emitting source, which pulses in a frequency range, and receptor. A noise barrier (limiting its maximum effective height) is situated between both. Its shape is modified to minimize the receptor measured sound level, which is calculated using BEM. Results of an inverse problem using the IL barrier curve as reference are successfully performed to validate the methodology. The proposed methodology is then used to obtain Y-barriers with 15% and 30% improved IL spectrum. Finally, six non-dominated solutions of the multi-objective optimum design problem are presented in detail.

MSC:

65K10 Numerical optimization and variational techniques
49Q10 Optimization of shapes other than minimal surfaces
49M37 Numerical methods based on nonlinear programming
76Q05 Hydro- and aero-acoustics
49N45 Inverse problems in optimal control
90C29 Multi-objective and goal programming
76M15 Boundary element methods applied to problems in fluid mechanics

Software:

NSGA-II
Full Text: DOI

References:

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