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dc.contributor.authorXia, Tong
dc.date.accessioned2010-09-10T19:40:44Z
dc.date.available2010-09-10T19:40:44Z
dc.date.issued2010-09-10
dc.date.submittedJuly 2010
dc.identifier.urihttp://hdl.handle.net/1928/11180
dc.description.abstractThis research primarily studies the effect of air on vibration of structures. Theoretical solutions based on various physics are derived and compared with experimental results to determine how air modifies the vibrational behavior of structures. This work may help in determining the characteristics of structural vibrations – from acoustic behavior to earthquake response - in practical buildings. The work consists of several primary components: derivation of theories that predict the effect of air on structural vibrations and vice-versa, design of experiments, and determination of the importance of air in structural vibrations and the applicability of different physics under various vibrational frequencies. Two types of physics - acoustic theory and fluid dynamics theory - are applied to derive solutions for damping ratios of air. Experiments such as an unbaffled plate experiment, a pendulum experiment and a baffled plate experiment are designed and conducted to observe the damping effect of air. Experimental results illustrate the applicability of the theories. Finite element analysis is performed to provide a computational basis with which to compare the observed vibrational frequencies. The main question in this research is whether air has a great effect on structural vibrations. The results show that air has a damping effect on vibrating buildings that can be important under certain conditions. The results also reveal that when calculating the damping effects due to air, different physics should be applied under different vibrational conditions. A dimensionless factor is derived to determine under which regimes acoustic theory is applicable, and under which regimes fluid dynamics theory is applicable.en_US
dc.description.sponsorshipUnited States Department of Energy National Science Foundation Sandia National Laboratoriesen_US
dc.language.isoen_USen_US
dc.subjectvibrationen_US
dc.subjectacousticen_US
dc.subjectFluiden_US
dc.subjectdynamicsen_US
dc.subjectairen_US
dc.subjectdampingen_US
dc.subject.lcshStructural dynamics.
dc.subject.lcshVibration.
dc.subject.lcshDamping (Mechanics)
dc.subject.lcshAir pressure.
dc.subject.lcshAerodynamics.
dc.subject.lcshSound-waves.
dc.subject.lcshAcoustic radiation pressure.
dc.subject.lcshFluid dynamics.
dc.subject.lcshFluid-structure interaction.
dc.titleEffect of air on vibration of structuresen_US
dc.typeThesisen_US
dc.description.degreeCivil Engineeringen_US
dc.description.levelMastersen_US
dc.description.departmentUniversity of New Mexico. Dept. of Civil Engineeringen_US
dc.description.advisorGerstle, Walter
dc.description.committee-memberRoss, Timothy
dc.description.committee-memberHayat, Majeed
dc.description.committee-memberGriffin, Steven


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