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contributor authorShu, Hang
contributor authorSmith, Scott A.
contributor authorBrake, Matthew R. W.
date accessioned2022-02-04T22:55:38Z
date available2022-02-04T22:55:38Z
date copyright2/1/2020 12:00:00 AM
date issued2020
identifier issn1048-9002
identifier othervib_142_1_011019.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4275724
description abstractStructural dynamic techniques have been proven accurate at predicting the vibrations of single parts (i.e., monolithic specimens), which are widely used in industrial applications. However, vibration analysis of such assemblies often exhibits high variability or nonrepeatability due to jointed interfaces. Inspired by advances in additive manufacturing (AM) and nonlinear vibration absorber theory, this research seeks to redesign jointed structures in an attempt to reduce the nonlinear effects introduced by the jointed interfaces. First, the nonlinear dynamics of a conventionally manufactured beam and an AM beam are measured in both a traditional (flat) lap joint assembly and also a “linearized” lap joint configuration (termed the small pad). Second, the internal structure of the AM beam is varied by printing specimens with internal vibration absorbers. With the two interface geometries studied in this experiment, the flat interface is found to be predominantly nonlinear, and introducing a vibration absorber fails to reduce the nonlinearities from the jointed interface. The small-pad responses are relatively linear in the range of excitation used in the analysis, and the nonlinear effects are further reduced with the presence of a center vibration absorber. Overall, the energy dissipation at the interface is highly dependent on the design of the contact interface and the internal vibration absorber. Adding a nonlinear vibration absorber alone is insufficient to negate the interfacial nonlinearity from the assembly; therefore, future work is needed to study the shape, location, and material for the design and fabrication of nonlinear vibration absorbers.
publisherThe American Society of Mechanical Engineers (ASME)
titleThe Influence of Additively Manufactured Nonlinearities on the Dynamic Response of Assembled Structures
typeJournal Paper
journal volume142
journal issue1
journal titleJournal of Vibration and Acoustics
identifier doi10.1115/1.4045381
journal fristpage011019-1
journal lastpage011019-9
page9
treeJournal of Vibration and Acoustics:;2020:;volume( 142 ):;issue: 001
contenttypeFulltext


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