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RISHigh-Frequency Dynamic Overshoot in Linear and Nonlinear Periodic Media
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We study the transient responses of linear and nonlinear semi-infinite periodic media on linear elastic foundations under suddenly applied, high-frequency harmonic excitations. We show that “dynamic overshoot” phenomena ...
Shock Mitigation by Means of Low to High Frequency Nonlinear Targeted Energy Transfers in a Large Scale Structure
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this computational study, the implementation of passive nonlinear vibroimpact attachments (termed nonlinear energy sinks (NESs)) for shock mitigation of an otherwise linear multistory largescale structure is investigated. ...
Absorption of Resonant Vibrations in Tuned Nonlinear Jointed Structures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel concept for the passive mitigation of forced, resonant vibrations is presented. The key to this concept is an absorption phenomenon which relies on the energy conversion from low to high frequencies by means of ...
Nonlinear Pulse Equipartition in Weakly Coupled Ordered Granular Chains With No Precompression
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We report on the strongly nonlinear dynamics of an array of weakly coupled, noncompressed, parallel granular chains subject to a local initial impulse. The motion of the granules in each chain is constrained to be in one ...
Passive Suppression Mechanisms in Laminar Vortex-Induced Vibration of a Sprung Cylinder With a Strongly Nonlinear, Dissipative Oscillator
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We study cross-flow vortex-induced vibration (VIV) of a linearly sprung circular cylinder equipped with a dissipative oscillator with cubic stiffness nonlinearity, restrained to move in the direction of travel of the ...
A Nonlinear Reduced-Order Model of the Corpus Callosum Under Planar Coronal Excitation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Traumatic brain injury (TBI) is often associated with microstructural tissue damage in the brain, which results from its complex biomechanical behavior. Recent studies have shown that the deep white matter (WM) region of ...
Sustained High Frequency Dynamic Instability of a Nonlinear System of Coupled Oscillators Forced by Single or Repeated Impulses: Theoretical and Experimental Results
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This report describes the impulsive dynamics of a system of two coupled oscillators with essential (nonlinearizable) stiffness nonlinearity. The system considered consists of a grounded weakly damped linear oscillator ...
Acoustic Non-Reciprocity in Lattices With Nonlinearity, Internal Hierarchy, and Asymmetry: Computational Study
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Reciprocity is a property of linear, time-invariant systems whereby the energy transmission from a source to a receiver is unchanged after exchanging the source and receiver. Nonreciprocity violates this property and can ...
Separation of Traveling and Standing Waves in a Rigid-Walled Circular Duct Containing an Intermediate Impedance Discontinuity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, we study the phenomenon of separation of traveling and standing waves in a one-dimensional rigid-walled circular duct. The underlying mechanism for separation, mode complexity, is linear and introduced here ...