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Full-Text Articles in Mechanical Engineering
The Influence Of Gaps On The Frequency Response Of A Beamspring Contact System, Wenbin Zhang
The Influence Of Gaps On The Frequency Response Of A Beamspring Contact System, Wenbin Zhang
Open Access Theses
Some mechanical systems with gaps such as in disc brakes and Cardan joints exhibit nonlinearity under certain load conditions, which is unpredictable and highly sensitive to initial conditions. Previous studies were mainly focused on either a single-degree-of-freedom (DOF) system or a flexible beam with uniform elastic foundation. The analysis of this thesis is a combination of these two where gaps are first introduced to a flexible beam model. A model of a beam resting on compliant foundation with gaps has been developed and analyzed. The assumed modes method is used to derive the equations of motion (EOM's) for the system. …
Health Diagnosis Of Lithium-Ion Battery Cell Using Vibration-Based Test And Analysis, Huan Le Pham
Health Diagnosis Of Lithium-Ion Battery Cell Using Vibration-Based Test And Analysis, Huan Le Pham
Open Access Theses
With their superior advantages of high capacity and low percentage of self-discharge, lithium-ion batteries, which are most commonly used as power sources for hand-held electronic devices, have become the most popular choice for power storage in electric vehicles. Due to the increased potential for long life of lithium-ion batteries in vehicle applications, manufacturers are pursuing methodologies to increase the reliability of their batteries. Methods are now being developed to monitor the health of lithium-ion batteries throughout their life cycle. The work in this thesis is focused on utilizing non-destructive vibration diagnostic testing methods to monitor changes in the physical properties …