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SUMMARY:Design Optimisation of Locally Resonant Metamaterials under Uncert
 ainty - Niccolo Klinger\, PhD student\, CUED
DTSTART:20260227T160000Z
DTEND:20260227T170000Z
UID:TALK242836@talks.cam.ac.uk
CONTACT:46601
DESCRIPTION:The past decade has witnessed a growing focus on vibro-acousti
 c metamaterials for vibration mitigation\, owed to their ability to exhibi
 t a frequency bandgap. This is a region where the vibration response is si
 gnificantly reduced around a targeted resonance. The high degree of tunabi
 lity of metamaterials for different applications and operating conditions 
 makes them particularly appealing to design engineers.\n \nRecent research
  has pivoted around the optimisation of metamaterials unit cells to maximi
 se the attenuation band and minimise the amplitude of the response in the 
 frequency domain\, hence showing better performance than traditional mater
 ials. Most modelling techniques for metamaterials rely exclusively on phys
 ics-based models and using the results to identify candidates for experime
 ntal testing. However\, these models do not take into account uncertaintie
 s that arise in manufacturing\, mounting\, experimental data collection an
 d model assumptions. Accounting for these uncertainties at the digital des
 ign step is essential towards obtaining metamaterials design that are robu
 stly optimised under uncertainty.\n \nThis work investigates the character
 isation of various sources of uncertainties between different nominally id
 entical Locally Resonant Metamaterials beams. Through an experimental camp
 aign\, the built metamaterials are compared to their corresponding digital
  design in a Finite Element Model.\n\nConsideration on state-of-the-art op
 timisation techniques are drawn\, considering the shortcomings and possibl
 e solutions through a freamework that uses experimental quantification of 
 the various sources of uncertainty.
LOCATION:JDB Seminar Room\, CUED
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