Global ETD Search
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Showing 1 to 8 of 8 for “"newmark's method"”.
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Dinâmica de estruturas prismáticas laminares - consideração de cargas móveis
… with the Fourier series, the finite element method is used to discretize the spatial variables. The resulting system of ordinary differential equations is integrated by means of Newmark's method. Some example problems are analised in order to compare its results with some known solutions.
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Analysis of composite moving beams using higher order shear deformation theory
… the beam is carried out using the finite element method. The formulation is based on a variational principle. The essential constraints are applied via Lagrange multipliers. This method is effective for the moving beam problem where the relative support locations change with time and therefore the …
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Error estimation and adaptivity in deformable solid dynamics
… are analyzed. Later, we propose a novel methodology for the formulation of a posteriori error estimators for the most common time-stepping methods employed in solid and structural dynamics. The estimators obtained by means of this methodology are accurate even in non-smmoth problems, they …
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Improved methods for forward and inverse solution of the wave equation for piles
… discusses the development of an improved method for the static and dynamic analysis of driven piles for both forward and inverse solutions. Wave propagation in piles, which is the result of pile head (or toe) impact and the distributed mass and elasticity of the pile, was analyzed in two …
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Development of high-order doubly asymptotic open boundaries for wave propagation in unbounded domains by extending the scaled boundary finite element method
… by employing the scaled boundary finite element method, which is a semi-analytical fundamental-solution-less boundary-element method based on finite elements. To avoid the computationally expensive task of numerically integrating the scaled boundary finite element equation in dynamic stiffness, …
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An Experimental Study of the Dynamic Behavior of Slickensided Surfaces
… surfaces in clay slopes during earthquakes. A method was developed for preparing slickensided rupture surfaces in the laboratory, and a series of ring shear tests, direct shear tests, and triaxial tests was conducted to study the static and cyclic shear resistance of slickensided surfaces. Two …
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Seismic behaviour of anchored steel sheet pile walls in sand
… designed for seismic actions using pseudo-static methods. Their displacements can be estimated using a Newmark's sliding block approach. A deeper understanding of the seismic behaviour of these structures is required to identify the main parameters affecting their maximum internal forces and …
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Modeling Vehicle and Rail Vibrations Due to the Passage of High Speed Trains Using Coupled Traveling and Stationary Finite Element Models
… on the rail by the traveling train. The coupling methodology and shape function force and displacement interpolation are validated through comparisons with a baseline finite element model of the joint track and train. Parametric studies concerning rail damping, stiffness, and irregularities of the …