Dynamic modal parameters of an extremely lightweight structure using a gyroid core for bridge bearings

Pasakorn Sengsri, Sakdirat Kaewunruen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This article reports an extremely lightweight structure used as a sandwich core for bridge bearings due to their superior mechanical properties, such as sound and vibration attenuation, rigidity, and energy absorption. The structure is based on triply periodic minimal surfaces (TPMS) conceived by observing the scales of butterflies’ wings. The vibration behaviours of this innovative structure used in these bearings are not well-known and have never been fully investigated. Therefore, it is important to comprehend their vibration behaviours and also to
identify dynamic modal parameters of these bridge bearings. Two gyroid sandwich panel finite element models with different unit cell sizes used as bridge bearings are examined with a computational method. The numerical investigation shows the vibration mechanisms and provides the dynamic modal parameters important in establishing relationships between its mechanical performance and geometry. Finite element predictions of the vibration behaviours of the two models with different unit cell sizes under free vibration provide good results.
These results can be implemented to better generate informed lightweight structure designs for bridge bearings, which are subjected to different vibration conditions.
Original languageEnglish
Title of host publicationThe 17th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-17)
Subtitle of host publicationEASEC17
PublisherNational University of Singapore
Publication statusPublished - 27 Jun 2022
EventThe 17th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-17): EASEC-17 - Singapore, Singapore, Singapore
Duration: 27 Jun 202230 Jun 2022
https://easec-17.org/

Conference

ConferenceThe 17th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-17)
Abbreviated titleEASEC-17
Country/TerritorySingapore
CitySingapore
Period27/06/2230/06/22
Internet address

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