New Frontiers and Innovative Methods for Hybrid Simulation
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EDITORIAL
New Frontiers and Innovative Methods for Hybrid Simulation S.J. Dyke 1 & O.S. Bursi 2 & B. Stojadinovic 3 Received: 21 August 2020 / # The Society for Experimental Mechanics, Inc 2020
Resilient infrastructure requires that we strive to obtain a deeper understanding of the salient behaviors and uncertainties present when structures are exposed to extreme or hazardous loading conditions. When structural systems are too large or complex to test in the laboratory, the cyberphysical testing method known as hybrid simulation (HS), a.k.a. dynamic virtualization, provides an important tool for their examination. By coupling the physical and virtual subsystems is especially beneficial due to the realistic conditions that can be imposed on the physical subsystem. Past applications of hybrid simulation have largely focused on addressing issues in earthquake engineering. However, in the last several years, we have seen an explosion in novel applications in which hybrid simulation methods are being exploited. Researchers are advancing the theory and practice of hybrid simulation to consider a spectrum of scenarios such as severe wind loading, coastal inundation and tsunami loading, seismic-induced fires, thermo-mechanical loading, and even bio-mechanical systems. In parallel, researchers have also been pushing the boundaries to examine approaches to revitalize hybrid simulation such as experimental design, machine learning, uncertainty quantification, nonlinear and adaptive control, decoding instabilities, and parallel computing. This timely and tremendous expansion in the scope and capabilities of this class of methods is driven by the need to investigate, at lower cost, both multi-physics and multi-hazard scenarios, while also performing experiments to establish rigorous solutions to future infrastructure challenges. In 2017 the US National Science Foundation funded a virtual community, the Multi-hazard Engineering Collaboratory on Hybrid Simulation (MECHS) to bring together researchers in hybrid simulation from around the world for a series of * S.J. Dyke [email protected] 1
Purdue University, West Lafayette, IN, USA
2
University of Trento, Trento, Italy
3
ETH Zurich, Zurich, Switzerland
international workshops. The 2nd MECHS Workshop “New Frontiers and Innovative Methods” was held on March 13–15, 2019 in Zurich, Switzerland in partnership with researchers at ETH Zurich. Thirty-five researchers participated, including multi-hazard engineering researchers, graduate students, international partners and interdisciplinary collaborators. This special issue is meant to share the research directions discussed during this joint ETH-MECHS workshop to advance the field of hybrid simulation and to explore new and challenging applications. The special issue begins with an overview of current research by Ramirez-Senent et al. By surveying recent literature about and contributions to the field, they identify key challenges being addressed, such as control paradigms, nonlinear behavior, and computational bottlenecks. Saude
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