Event Detail

Event Type: 
Applied Mathematics and Computation Seminar
Date/Time: 
Friday, November 19, 2021 - 12:00 to 12:50
Location: 
ZOOM

Speaker Info

Institution: 
OSU ME/CCE
Abstract: 

Data from realistic full-scale simulations providing insight into the wave-induced response of
structures is very limited. In particular, structural behavior under wave-induced loads is not well understood
due to: [i] difficulties and uncertainties in handling combined computational fluid and structural models,
requiring validation with experimental data, and [ii] limitations in traditional experimental techniques that
necessitate idealized, scaled structural specimensthat may not represent full-scale structural response. Realtime hybrid simulation (RTHS) is a cost-effective cyber-physical simulation method that can be used to
examine the behavior of systems too large or complex to test fully in a laboratory setting, alleviating the
aforementioned constraints. In RTHS, a system is split into two portions: an experimental, physical subassembly and a computational, numerical sub-assembly. The physical and numerical sub-assemblies
interact, in real-time, through sensors and actuators. The response of the coupled, hybrid sub-assemblies
then represents the response of a complete assembly; thus, mitigating many of the similitude constraints
imposed in traditional wave experiments. Hydrodynamic-RTHS, or hydro-RTHS, couples physical waves
and a partial structural specimen with a computational structural model in the NHERI-EF Large Wave
Flume at OSU; this choice of sub-assemblies is practical as it physically simulates the wave-structure
response and leverages the complexity and similitude advantages gained through the structural numerical
model.

BIO: Barbara Simpson is currently an Assistant Professor at Oregon State University. She received her
Ph.D. from UC Berkeley and her Bachelor of Science from the University of Kansas. Dr. Simpson uses
advanced computational and experimental methods to characterize structural response. Her aim is to
develop innovative structural systems that improve building performance and reduce the effects of natural
hazards on the built environment. One of her current pursuits is the development of real-time hybrid
simulation frameworks for fluid-structure interaction problems. Other research areas include the robust
design and retrofit of building structures with emphasis on strongback-spine and braced frame systems,
performance-based earthquake engineering, and computational modeling, optimization, and simulation.