Structural Frequency Response Optimization under Bandwidth Excitation

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (9) : 113-117.

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Structural Frequency Response Optimization under Bandwidth Excitation

LI Xiang, WANG Hao, CHEN Li-fen

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Abstract

A structural dynamics response optimization under bandwidth frequency excitation is considered. A differentiable -norm form of response function’s peak value is introduced according to properties of frequency response function. This equivalent aim function can be used in multiple-bandwidth situation. Sensitivities of equivalent aim function then can be derived from structure’s eigen-sensitivity. Besides，frequency constraints were introduced for prohibiting clustered or repeated frequencies during optimization. Illustrated examples of truss sizing and shape optimization are presented for verification and application for proposed method.

Key words

bandwidth frequency response / frequency response optimization / sizing optimization / shape optimization / response sensitivity

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LI Xiang;WANG Hao;CHEN Li-fen. Structural Frequency Response Optimization under Bandwidth Excitation[J]. Journal of Vibration and Shock, 2012, 31(9): 113-117