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http://dx.doi.org/10.5139/JKSAS.2017.45.5.376

Estimation of Structural Displacements for Cantilever Beam Using Mode Shapes and Accelerometers Under Free Vibration  

Kim, Kyung Jong (Inha University)
Lee, Yong Hwan (Inha University)
Lee, Kyu Beom (Inha University)
Lee, Cheol Soon (Inha University)
Cho, Jin Yeon (Inha University)
Kim, Jeong Ho (Inha University)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.45, no.5, 2017 , pp. 376-385 More about this Journal
Abstract
In this paper, a method for the estimation of structural displacements using structure's mode shapes and accelerations is suggested to reduce the disadvantages of acceleration time integration method. Acceleration time integration method requires accurate information on initial conditions, and errors caused by noise can be accumulated during time integration. To avoid these problems, the method for the estimation of structural displacements based on mode superposition method is developed and two vibration experiments for cantilever beam are conducted to verify this method. Static displacements and dynamic displacements of beam structure are estimated using measured accelerations from experiments and mode shapes of cantilever beam, and they are compared with measured displacements using laser displacement sensor. From these results, the validity and usefulness of this method are verified.
Keywords
Displacement Estimation; Mode Superposition; Accelerometer; Free Vibration; Base Excitation;
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