Finite element model updating of exponential non-viscous damping systems
Author(s)
Otsuki, Yu
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Abstract
Finite element (FE) models are mathematical representations that simulate the physical behavior of various engineering systems. The majority of engineering structural models employ viscous damping due to its mathematical simplicity. However, significant differences can exist between the actual damping behavior of structural systems and the prediction of a viscous damping model. Alternatively, "non-viscous damping", which uses a kernel function and a convolutional integral in the equation of motion, has been proposed to incorporate time-hysteresis damping effects that are absent in viscous damping. Compared to undamped or viscous damping systems, there have been very limited studies on the FE model updating of non-viscous damping systems, especially in their practical applications and validations with real-world as-built structures. The objective of this thesis is to develop diverse approaches for FE model updating of non-viscous damping systems using exponential kernel functions. Additionally, the thesis performs experimental validations and comparisons between the proposed non-viscous damping approaches and conventional viscous damping approaches.
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Date
2023-07-30
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Dissertation