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Articles 1 - 13 of 13
Full-Text Articles in Mechanical Engineering
Design Of A Thermally Activated Energy Harvesting System, D, Quinn, Zachary Toom
Design Of A Thermally Activated Energy Harvesting System, D, Quinn, Zachary Toom
Dr. D Dane Quinn
No abstract provided.
Edge Effects In The Energy Dissipation Of Jointed Structures, Adam Brink, D, Quinn
Edge Effects In The Energy Dissipation Of Jointed Structures, Adam Brink, D, Quinn
Dr. D Dane Quinn
No abstract provided.
Influence Of Charge Transfer Interconnection Topology On State Of Charge Performance In Battery Packs: Simulation Results, D, Quinn, Tom Hartley
Influence Of Charge Transfer Interconnection Topology On State Of Charge Performance In Battery Packs: Simulation Results, D, Quinn, Tom Hartley
Dr. D Dane Quinn
No abstract provided.
Comparing Linear And Essentially Nonlinear Vibration-Based Energy Harvesting, D, Quinn, Angela Triplett, Lawrence Bergman, Alexander Vakakis
Comparing Linear And Essentially Nonlinear Vibration-Based Energy Harvesting, D, Quinn, Angela Triplett, Lawrence Bergman, Alexander Vakakis
Dr. D Dane Quinn
This work considers the performance of a resonant vibration-based energy harvesting system utilizing a strongly nonlinear attachment. Typical designs serving as the basis for harvesting energy from ambient vibration typically employ a linear oscillator for this purpose, limiting peak harvesting performance to a narrow band of frequencies about the resonant frequency of the oscillator. Herein, in an effort to maximize performance over the broader band of frequency content typically observed in ambient vibration measurements, we employ an essentially nonlinear cubic oscillator in the harvesting device and show that, with proper design, significant performance gains can be realized as compared with …
An Evaluation Of Highered 2.0 Technologies In Undergraduate Mechanical Engineering Courses., Amy Orange, Walter Heinecke, Edward Berger, Borjana Mikic, D, Quinn
An Evaluation Of Highered 2.0 Technologies In Undergraduate Mechanical Engineering Courses., Amy Orange, Walter Heinecke, Edward Berger, Borjana Mikic, D, Quinn
Dr. D Dane Quinn
No abstract provided.
Effective Stiffening And Damping Enhancement Of Structures With Strongly Nonlinear Local Attachments, Themistoklis Sapsis, D. Dane Quinn, Alexander Vakakis, Lawrence Bergman
Effective Stiffening And Damping Enhancement Of Structures With Strongly Nonlinear Local Attachments, Themistoklis Sapsis, D. Dane Quinn, Alexander Vakakis, Lawrence Bergman
Dr. D Dane Quinn
We study the stiffening and damping effects that local essentially nonlinear attachments can have on the dynamics of a primary linear structure. These local attachments can be designed to act as nonlinear energy sinks (NESs) of shock-induced energy by engaging in isolated resonance captures or resonance capture cascades with structural modes. After the introduction of the NESs, the effective stiffness and damping properties of the structure are characterized through appropriate measures, developed within this work, which are based on the energy contained within the modes of the primary structure. Three types of NESs are introduced in this work, and their …
Design, Simulation, And Large-Scale Testing Of An Innovative Vibration Mitigation Device Employing Essentially Nonlinear Elastomeric Springs, Jie Luo, Nicholas Wierschem, Larry Fahnestock, Billie Spencer, Jr., D. Dane Quinn, D. Michael Mcfarland, Alexander Vakakis, Lawrence Bergman
Design, Simulation, And Large-Scale Testing Of An Innovative Vibration Mitigation Device Employing Essentially Nonlinear Elastomeric Springs, Jie Luo, Nicholas Wierschem, Larry Fahnestock, Billie Spencer, Jr., D. Dane Quinn, D. Michael Mcfarland, Alexander Vakakis, Lawrence Bergman
Dr. D Dane Quinn
This study proposes an innovative passive vibration mitigation device employing essentially nonlinear elastomeric springs as its most critical component. Essential nonlinearity denotes the absence (or near absence) of a linear component in the stiffness characteristics of these elastomeric springs. These devices were implemented and tested on a large-scale nine-story model building structure. The main focus of these devices is to mitigate structural response under impulse-like and seismic loading when the structure remains elastic. During the design process of the device, numerical simulations, optimizations, and parametric studies of the structure-device system were performed to obtain stiffness parameters for the devices so …
Magnetic Bearings For Non-Destructive Health Monitoring Of Rotating Machinery Supported In Conventional Bearings, M. Kasarda, D, Quinn, T. Bash, D. Inman, R. Kirk, Jerzy Sawicki
Magnetic Bearings For Non-Destructive Health Monitoring Of Rotating Machinery Supported In Conventional Bearings, M. Kasarda, D, Quinn, T. Bash, D. Inman, R. Kirk, Jerzy Sawicki
Dr. D Dane Quinn
This paper describes initial results from a project expanding the field of rotor health monitoring by using Active Magnetic Bearings (AMBs) as actuators for applying a variety of known force inputs to a spinning rotor in order to monitor and evaluate response signals resulting from these inputs on-line. Similar to modal analysis and other nondestructive evaluation (NDE) techniques which apply input signals to static structures in order to monitor responses; this approach allows for the measurement of both input and output response in a rotating system for evaluation. However, unlike these techniques, the new procedure allows for multiple forms of …
Large-Scale Experimental Evaluation And Numerical Simulation Of A System Of Nonlinear Energy Sinks For Seismic Mitigation, D, Quinn, Jie Luo, Sean Hubbard, Nicholas Wierschem, Larry Fahnestock, D Mcfarland, Billie Spencer, Alexander Vakakis, Lawrence Bergman
Large-Scale Experimental Evaluation And Numerical Simulation Of A System Of Nonlinear Energy Sinks For Seismic Mitigation, D, Quinn, Jie Luo, Sean Hubbard, Nicholas Wierschem, Larry Fahnestock, D Mcfarland, Billie Spencer, Alexander Vakakis, Lawrence Bergman
Dr. D Dane Quinn
As a novel dynamic vibration absorber, the nonlinear energy sink has been studied for mitigating structural and mechanical vibration through the last decade. This paper presents a series of large-scale experimental evaluations and numerical simulations on a system of nonlinear energy sink (NES) devices for mitigating seismic structural responses. Two distinct types of NES devices were installed in the top two floors of a large-scale model building structure. In the device system, four Type I NESs employing smooth essentially nonlinear restoring forces were used in conjunction with two single-sided vibro-impact (SSVI) NESs employing non-smooth impact nonlinearities. These NES devices utilize …
Modal Analysis Of Jointed Structures, D. Dane Quinn
Modal Analysis Of Jointed Structures, D. Dane Quinn
Dr. D Dane Quinn
Structural systems are often composed of multiple components joined together at localized interfaces. Compared to a corresponding monolithic system these interfaces are designed to have little influence on the load carrying capability of the system, and the resulting change in the overall system mass and stiffness is minimal. Hence, under nominal operating conditions the mode shapes and frequencies of the dominant structural modes are relatively insensitive to the presence of the interfaces. However, the energy dissipation in such systems is strongly dependent on the joints. The microslip that occurs at each interface couples together the structural modes of the system …
Closure To “Discussion Of ‘On The Role Of Nonlinearities In Energy Harvesting: A Critical Review And Discussion’”, Mohammed Daqaq, Ravindra Masana, Alper Erturk, D. Dane Quinn
Closure To “Discussion Of ‘On The Role Of Nonlinearities In Energy Harvesting: A Critical Review And Discussion’”, Mohammed Daqaq, Ravindra Masana, Alper Erturk, D. Dane Quinn
Dr. D Dane Quinn
No abstract provided.
Equivalent Modal Damping, Stiffening And Energy Exchanges In Multi-Degree-Of-Freedom Systems With Strongly Nonlinear Attachments, D. Dane Quinn, Sean Hubbard, Nicholas Wierschem, Mohammad Al-Shudeifat, Richard Ott, Jie Luo, Billie Spencer, D. Mcfarland, Alexander Vakakis, Lawrence Bergman
Equivalent Modal Damping, Stiffening And Energy Exchanges In Multi-Degree-Of-Freedom Systems With Strongly Nonlinear Attachments, D. Dane Quinn, Sean Hubbard, Nicholas Wierschem, Mohammad Al-Shudeifat, Richard Ott, Jie Luo, Billie Spencer, D. Mcfarland, Alexander Vakakis, Lawrence Bergman
Dr. D Dane Quinn
We consider the response of a linear structural system when coupled to an attachment containing strong or even essential nonlinearities. For this system, the attachment, designated as a nonlinear energy sink, is designed as a nonlinear vibration absorber, serving to dissipate energy from the structural system. Moreover, the attachment not only leads to a reduction in the total energy of the system, but also nonlinearly couples together the vibration modes of the linear structural system. When the structure is impulsively loaded, the nonlinear energy sink serves to both dissipate and redistribute energy, thus enhancing the observed structural dissipation. The effect …
Design Of Novel Charge Balancing Networks In Battery Packs, D. Dane Quinn, Tom Hartley
Design Of Novel Charge Balancing Networks In Battery Packs, D. Dane Quinn, Tom Hartley
Dr. D Dane Quinn
In a modern battery pack, the charge in the individual cells can diverge in time, leading to decreased capacity and reduced operating life of the pack. Charge balancing systems can be introduced to equalize the state of charge across the multiple cells, therefore increasing the performance of the battery pack. This work considers the dynamic performance of charge balancing systems, and through simulation explores how their ability to equalize the state of charge depends on the design of the underlying charge balancing network. The performance of the charge balancing system is described in terms of the rate at which the …