Power flow sensitivity analysis for optimal structural modification

Meggitt, J.W.R.

Abstract

Across many industries there is a need to develop products with improved vibro-acoustic performance. Whether the aim is to reduce the radiated sound level in a vehicle cabin, or to minimise the vibration level of sensitive components, the problem may be interpreted as an issue of power transmission from vibration generating components to receiving structures. Interest thus lies in how best to modify a struc- ture, typically the separating interface between active and passive components, to reduce transmitted power. The ‘best’ modification is interpreted here as the one that achieves the greatest reduction in trans- mitted power, for the smallest necessary modification. In the present paper we consider power transmis- sion from a component-based perspective, and propose a sensitivity analysis to determine a) the optimum structural modifications (e.g. added mass, stiffness or damping) and b) to which degrees of free- dom these should be applied. Numerical and experimental examples demonstrate the proposed method.

Citation

Meggitt, J. (2023). Power flow sensitivity analysis for optimal structural modification. Applied Acoustics, 211, Article 109463. https://doi.org/10.1016/j.apacoust.2023.109463

• Journal Article Type: Article
• Acceptance Date: Jun 2, 2023
• Online Publication Date: Jun 8, 2023
• Publication Date: Jun 9, 2023
• Deposit Date: Jun 9, 2023
• Publicly Available Date: Jun 12, 2023
• Journal: Applied Acoustics
• Print ISSN: 0003-682X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 211
• Article Number: 109463
• DOI: https://doi.org/10.1016/j.apacoust.2023.109463
• Keywords: Acoustics and Ultrasonics