Precise integration method for natural frequencies and mode shapes of ocean risers with elastic boundary conditions
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DOI: 10.1016/j.apm.2018.05.017
Abstract: Abstract The effects of the elastic constraints simulating damaged and undamaged boundaries on the natural frequencies and mode shapes of ocean risers with a variable axial tension are investigated using the precise integration method (PIM).… read more here.
Keywords: ocean risers; frequencies mode; boundary conditions; mode shapes ... See more keywords
Natural Frequencies and Mode Shapes of Drill Pipe in Subsea Xmas Tree Installation
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DOI: 10.1155/2020/5634194
Abstract: In this study, experimental and numerical investigations on the vibration characteristics of a drill pipe during the lowering of a subsea Xmas tree were presented. A fourth-order partial differential equation with variable coefficients was established… read more here.
Keywords: frequencies mode; drill pipe; xmas tree; mode shapes ... See more keywords
Measurement of natural frequencies and mode shapes of transparent insect wings using common-path ESPI.
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DOI: 10.1364/oe.451968
Abstract: In this study, a common-path electronic speckle pattern interferometry system which upholds the natural property of transparency of insect's wings has been developed to measure the wings' natural frequencies and mode shapes for the first… read more here.
Keywords: frequencies mode; mode shapes; insect wings; natural frequencies ... See more keywords