Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"modal solution"”.
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Aplicação do método da superposição modal na análise estática não linear de estruturas
… pre-buckling behaviour. This work presents a modal method extension where both geometric and physical nonlinearities are considered. For problems which the mild nonlinearity condition is not satisfied, the modal solution is corrected by a procedure based on updating of the coordinate system …
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Integrated structural design, vibration control, and aeroelastic tailoring by multiobjective optimization
… feedback gains determined by Independent Modal Space Control. Pareto optimal designs generated for a simple beam and a tetrahedral truss demonstrated the benefit of solving the integrated structural and control optimization problem. The use of quasi-steady aerodynamic strip theory with a …
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Effect of grazing flow on structural-acoustic response of an elastic plate with sound in a duct
… flow. A linear, time-harmonic theory based on modal descriptions of the plate velocity and duct acoustic fields is first developed. The theory includes the effect of uniform mean flow in the duct and clamped and simply-supported boundary conditions for the plate. The sound radiated by the plate …
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Non-linear dynamic modeling using component mode synthesis
… model. The plastic strain is determined from the modal response using classical plasticity theory and applied to the modal solution by projecting an effective nodal force vector on the modal coordinates to induce plastic deformation. The method can be tailored to the frequency range of interest to …
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Infrasound as upper atmospheric monitor
… (high Mach number) background flow, based on a modal expansion. The underlying mathematics is by no means new and has been earlier described. This solution goes beyond the effective sound speed approximation, which is typically used in infrasound propagation modeling for computational efficiency …
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Finite element modelling of photonic crystal fibres
… based finite element method (FEM). Besides the modal solutions of the effective indices, mode field profiles, spot sizes, modal hybridness, polarization beat length and group velocity dispersion values for equal and unequal air holes; research was carried out to optimize and design highly …
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Finite element characterisation of photonic crystal fibres
… losses of Photonic Crystal Fibres (PCF). A modal solution approach including the implementations of the conformal transformation and the Perfectly Matched Layer (PML) were undertaken to determine the bending and leakage losses of several designs of Photonic Crystal Fibres. This was carried …