In-situ sub-structure decoupling of resiliently coupled assemblies

Meggitt, JWR; Moorhouse, AT

Abstract

The context of this paper is the increasing need for vibro-acoustic simulation across many sectors. A procedure
is derived for decoupling the components of resiliently mounted assemblies. An independent characterisation of
the components is obtained such that they can be mathematically recombined with other elements to form virtual assemblies or Virtual Acoustic Prototypes. Unlike standard decoupling procedures, the proposed approach does not require the assembly to be physically decoupled at any stage. It is argued that this offers significant advantages in terms of convenience and, importantly, representativeness. The boundary conditions within a physically coupled assembly are realistic by definition, which may not be the case for physically decoupled components. The procedure is validated numerically using a lumped parameter model and demonstrated experimentally through several case studies.
Keywords: In-situ, measurement, experimental,free-interface, decoupling, FRF, sub-structure, structural, characterisation

Citation

Meggitt, J., & Moorhouse, A. (2019). In-situ sub-structure decoupling of resiliently coupled assemblies. Mechanical Systems and Signal Processing, 117, 723-737. https://doi.org/10.1016/j.ymssp.2018.07.045

• Journal Article Type: Article
• Acceptance Date: Jul 21, 2018
• Online Publication Date: Aug 23, 2018
• Publication Date: Feb 15, 2019
• Deposit Date: Feb 8, 2019
• Publicly Available Date: Aug 23, 2019
• Journal: Mechanical Systems and Signal Processing
• Print ISSN: 0888-3270
• Publisher: Elsevier
• Volume: 117
• Pages: 723-737
• DOI: https://doi.org/10.1016/j.ymssp.2018.07.045
• Publisher URL: https://doi.org/10.1016/j.ymssp.2018.07.045
• Related Public URLs: https://www.journals.elsevier.com/mechanical-systems-and-signal-processing