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Particle Damping Applications for Shock and Acoustic Environment Attenuation
49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference <br> 16th AIAA/ASME/AHS Adaptive Structures Conference<br> 10t, 2008Shock and acoustic environments can have significant impact in the overall design of a typical spacecraft. Often, mass constraints and other restrictions pose a considerable challenge in the design of a bus and a payload that can survive these environments.
Stepan Simonian +4 more
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Attenuation and Damping of Multireflected Transient Elastic Waves in a Pile
Journal of Engineering Mechanics, 2011Early time transient waves multireflected in a finite pile, governed by a damped wave equation, are analyzed by a reverberation-ray matrix. The pile is surrounded by compacted soil, and the composite is modeled by elastic springs and viscous dampers distributed along the length and at the tip of an elastic rod.
Yih-Hsing Pao, Yun-Yan Yu
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Seismic vibrations attenuation via damped layered periodic foundations
Engineering Structures, 2020Abstract In recent years, a new type of seismic isolation system which exploits the filtering effect of bandgaps, named Periodic Foundation, has been proposed to isolate the upper structure from ground motion. To date, several works have been conducted to validate the feasibility and efficiency of this new isolation system.
Cheng, Zhibao +5 more
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Effectiveness of active constrained layer damping treatments in attenuating resonant oscillations
19th AIAA Applied Aerodynamics Conference, 2001This paper highlights the importance of considering the piezoelectric constraining layer voltage (or electric field) limits when evaluating the effectiveness of an active constrained layer damping treatment in attenuating resonant vibration. It is seen that, when position feedback is used, intermediate viscoelastic layer stiffness values are always ...
Gandhi, Farhan, Munsky, Brian
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Stiffness and Damping Response Associated with Shock Attenuation in Downhill Running
Journal of Applied Biomechanics, 2004Studies on shock attenuation during running have induced alterations in impact loading by imposing kinematic constraints, e.g., stride length changes. The role of shock attenuation mechanisms has been shown using mass-spring-damper (MSD) models, with spring stiffness related to impact shock dissipation. The present study altered the magnitude of impact
Chu, JJ, Caldwell, GE
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Viscoelastic Damping of Structural Joints for Disturbance Isolation and Vibration Attenuation
50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2009Dam ping is a n important consideration in state -of -the -art space missions, as it is often us ed to mitigate launch loads and low -amplitude spacecraft disturbances . Although damping treatments are very effective, their implementation may be limited due to mass , cost and schedule constraints , or due to added complexity to the system design and ...
Vanessa Camelo +4 more
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Passive damping to attenuate snap loading on a ROV umbilical cable
Proceedings of OCEANS '93, 2002Summary form only given. Snap loading of the umbilical cable connecting a ship to a remotely operated vehicle (ROV) and its cage is a major problem when the ROV system is operating in rough sea conditions. Snap loading is the instantaneous, high magnitude, tensile loading of a cable.
R. Driscoll, L. Iggins
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Feasibility Study on the Efficiency of Parametric Damping for Attenuation of Environmental Noise
SAE Technical Paper Series, 2000<div class="htmlview paragraph">A new semi-active damping approach for the reduction of transmitted acoustic noise is investigated. It involves the controlled variation of the system's spring constant in response to the system's motion in such a way as to maximize the energy lost in the damping elements.
Rodolfo E. Diaz, Robert L. Petrisko
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Research on impact energy measurement based on FBG and damping attenuation
AOPC 2019: Optical Fiber Sensors and Communication, 2019A demodulation based on the principle of fiber Bragg grating edge filter method is used to measure impact energy of acrylic plate (PMMA) and aluminum plate in this paper. A new demodulation method based on damping attenuation principle is proposed. Fiber Bragg grating sensing system is built in the experiment.
Jianming Zhou +3 more
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Soft-Mode Damping and Ultrasonic Attenuation at a Structural Phase Transition
Physical Review B, 1970The soft-mode damping and the ultrasonic attenuation at a displacive phase transition has been calculated with the help of a model Hamiltonian. The soft-mode damping parameter $\ensuremath{\Gamma}$ is finite at the transition temperature, whereas the ultrasonic attenuation $\ensuremath{\alpha}$ is singular.
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