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Erschienen in:
2020 | OriginalPaper | Buchkapitel
30. Replicating Responses: A Virtual Environmental Test of Unknown Boundary Conditions
verfasst von : Timothy A. Devine, V. V. N. Sriram Malladi, Pablo A. Tarazaga
Erschienen in: Sensors and Instrumentation, Aircraft/Aerospace, Energy Harvesting & Dynamic Environments Testing, Volume 7
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Abstract
Environmental testing focuses on producing more appropriate testing procedures in laboratory settings which result in more accurate verification and validation of high-performance and sensitive equipment. However, replicating operational conditions in a testing space is challenging due to the unknown nature of the excitations and boundary conditions the system is subject to in the field. If the boundaries can be formulated in a way such that the response can be replicated with different boundary conditions, this would allow for testing of these structures in laboratory settings of known and applicable boundary conditions.
The present work models a finite element beam under unknown boundary conditions and attempts to match its spectral response given a known boundary conditions (i.e., a fixed-fixed boundary condition). Forcing inputs are derived for cases of specified and unspecified cross spectral densities for a subset of the initial response locations. The response of the fixed-fixed beam at all initial response locations is compared to the unknown boundary condition target responses to determine how well the force recreation fits the unknown response. Future work aims to replicate these scenarios in an experimental setting.