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The wrinkled shape, stress and effective mass are introduced into the modal model using the updated geometry technique.
A modal model using linear modes of the straight clamped clamped beam with a randomized stiffness matrix is employed to characterize the linear dynamic behavior of the uncertain beams.
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In order to reduce the computational costs, an appropriate reduced order matrix model using modal synthesis approach is also presented.
An analytical model using the integro-modal method is developed in order to describe these additional couplings due to shell defects.
The classical linear modal model is used, with additional terms included to represent the direct non-linear restoring forces of the system.
A recent study conducted an experimental modal testing on full-scale wind turbine prototype model using a shaking table facility (Prowel et al. 2008).
The stochastic reduced order model uses a modal reduction approach together with sparse grid based polynomial chaos expansion (PCE) to truncate both the system degrees of freedom (dof) as well as the random modes.
The model is first calibrated and verified with simplified models using modal and static pushover analysis.
MMIs are modelled using modal propagation analysis, which provides a rapid means of simulating the performance of such couplers across a large design space with varying structural parameters.
The direct model updating method is generally utilized to correct and update mass and stiffness matrices of theoretical models using measured modal parameters.
Furthermore, the mode shapes are compared with those obtained from finite element models using a Modal Assurance Criterion (MAC).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com