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Showing 1 to 16 of 16 for “"Mode superposition"”.
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Traveling waves in mode superposition
… the way long flexible cylinders respond at high mode numbers. The data from these experiments showed that the response of long flexible cylinders is often in the form of traveling waves. Therefore, it was necessary to develop an excitation force model which has traveling wave characteristics. …
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Using superposition of undamped modes to model non-orthogonally damped systems
… non-orthogonal damping leads to coupling between modes, rendering simple normal mode superposition solutions not sufficiently accurate. The flow-induced vibration of drilling and production risers used in the offshore petroleum industry is an example of such a structure. The uneven distribution of …
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Análise estática não-linear geométrica de estruturas pelo método de superposição modal com base Lanczos-Ritz
… work is to present the method of linear buckling mode superposition as a procedure for geometric nonlinear static analysis of slender structures, and to examine, as an alternative to a modal basis, the use of a coordinates transformation constitutes by vectors produced in a non-iterative way from …
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Estudo sobre a qualidade da resposta dinâmica do Método de Superposição dos Modos de Lanczos
… about a dynamic response quality for Lanczos Mode Superposition Method for structures submitted to large range of excitation periods is carried out. The unbalanced equation of motion, or residual, was evaluated from global parameters to address the response quality of a modal superposition …
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A Study of Shock Analysis Using the Finite Element Method Verified with Euler-Bernoulli Beam Theory; Mechanical Effects Due to Pulse Width Variation of Shock Inputs; and Evaluation of Shock Response of a Mixed Flow Fan
… it is very important to know how to properly model and obtain accurate solutions for complicated loading conditions such as shock loading. Transient acceleration loads, such as shocks, are not as common as static loads. Analyzing these types of problems is less understood, which is the basis …
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The enriched subspace iteration method and wave propagation dynamics with overlapping finite elements
In structural dynamic problems, the mode superposition method is the most widely used solution approach. The largest computational effort (about 90% of the total solution time) in the mode superposition method is spent on calculating the required eigenpairs and it is of critical importance to …
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Integração direta da resposta em regime permanente pelo Método de Ritz-Wilson com mudança de base
… to a single cycle of the excitation. The superposition of Ritz-Wilson vectors is used for the transient response solution. Basis change approaches are also presented to allow the application of the Ritz-Wilson method in the solution of dynamic response due to generic load cases. The final …
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Analyzing Skid Resistance and Tire/Road Noise on Porous Pavement Using Numerical Modeling
… attempts to explore the development of numerical models in predicting skid resistance and tire/road noise on porous pavements. The drainage capacity of a porous surface is modeled by a simplified pore structure. This porous pavement model is then integrated into the numerical skid resistance …
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Επιρροή της παραμορφωσιμότητας των πλακών στη στατιστική και δυναμική συμπεριφορά πολυόρορφων κτιρίων
… DYNAMIC SOLUTION OF THE STRUCTURES CONSIDERED A MODE SUPERPOSITION ANALYSIS WAS CARRIED OUT. THE RESPONSE SPECTRUM USED WAS THE ONE OF WHICH THE EUROCODE NO 8 PROPOSES.
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Reduced-order modeling of MEMS using modal basis functions
… the development of computer-aided design and modeling tools (CAD/CAM) that enable designers to reduce the time and cost it takes to produce working prototypes. An ideal scenario is one in which a designer is able to quickly model and simulate an entire microsystem - sensors, actuators and …
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A Unified Overlapping Finite Element Formulation
… elements contain no spurious zero energy mode, pass the patch test, and also show good distortion insensitivity. Given that the previous studies on overlapping elements focused on solving two-dimensional linear elastic problems, we demonstrate the use of the new elements and AMORE not only …
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Stability behaviour and dynamic response of cooling towers subjected to wind loading
… first buckles and the corresponding buckling modes. The cooling tower's geometry is changed in a systematic manner to obtain the relationship between critical wind speeds associated with the first mode of buckling and the cooling tower's geometry. Geometrical parameter ratios of the cooling …
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Exact modal synthesis methods for seismic analysis of primary and multiply supported secondary systems
… into two substructures. Unlike the conventional mode synthesis techniques, here the synthesis of modes is carried out by solving a second eigenvalue problem by nontraditional means: the eigenvalues of the combined structure are obtained by solving simple characteristic equations which,in the …
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Reduced order models for fluid-structure interaction systems by mixed finite element formulation
… are introduced to include the coupled sloshing mode. In addition, u/p mixed formulation is the first time employed in solid. The numerical examples will demonstrate that the mixed formulations are capable of predicted coupled frequencies and mode shapes even if primary slosh, structural, and …
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Computer-aided design of tension structures
… and description of the basis for the numerical modelling of tension structures. The discussion in Part I leads to the conclusion of a need for an interactive design procedure for tension structures which is the subject under consideration in Part II (chapters 5-7). In the design of tension …