Intentional utilization of strong nonlinearity in structural dynamics

Given that the conventional view in engineering design is to regard nonlinearity as either unwanted or detrimental-a “nuisance” to be at most tolerated and “designed around”-or as a mere perturbation of the predominantly linear dynamics, the two standard approaches of nonlinear structural dynamics were developed: The linearized and weakly nonlinear approaches. Yet, recent work has revealed the important benefits that strong nonlinearity offers over broad areas, from turbulent flows, fluid-structure interactions, vibration and shock isolation, and acoustic metamaterials, to energy harvesting, blast and acoustic mitigation, and nano/micro design. Indeed, it is the author's view that accounting for, understanding of, and designing with strong nonlinearity will become a cornerstone of future engineering practice. This work focuses on constructive utilization of intentional strong nonlinearity to enable passive energy management in dynamical systems across spatial and temporal scales. After a brief review of recent applications, emphasis is given to passive blast mitigation of large-scale infrastructure.