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Showing 1 to 14 of 14 for “"Linear transient"”.
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Computational aspects of sensitivity calculations in linear transient structural analysis
… velocities, accelerations, and stresses in linear, structural, transient response problems. One significant goal of the study was to develop and evaluate sensitivity calculation techniques suitable for large-order finite element analyses. Accordingly, approximation vectors such as vibration …
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Finite element based non-linear transient analysis of active magnetic bearing turbomachinery
… algorithm capable of analyzing this non-linear system. An efficient transient response analysis program was developed for evaluation of shock loading, blade loss and rotor drop of active magnetic bearing machinery. This program can analytically predict the path of the rotor and the …
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Vibrações e estabilidade paramétrica de cascas axissimétricas
… generates a periodic excitation on the shell. Linear and non-linear transient responses are then obtained through a finite difference approximation in the time domain anda finite element discretization in the longitudinal direction. The steady-state periodic solution is determined. Its …
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Investigating thermal dependence on monolithically-integrated photonic interconnects
… By introducing the compact thermal model with linear transient thermal analysis solver, system thermal dynamics can be monitored at high efficiency. We demonstrate the temperature profile of a multi-core microprocessor system running real workloads. The evaluation results show the system …
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Resposta dinâmica e estabilidade de tubos com escoamento interno
… a finite element model is developed to analyze: linear and non-linear transient response and free vibrations problems and dynamic stability of pipes conveying fluid. Making use of an updated lagrangian formulation for the principle of virtual work the incremental equations of motion are deduced. …
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Hydraulic properties of subglacial sediment determined from the mechanical response of water-filled boreholes
… this freezing forcing was developed, using a non-linear transient viscoelastic ice rheology and an approximate model of top-down freezing. The resulting system of equations was solved using the method of lines. Results agree well with analytic solutions, if parameters are correctly chosen. Forward …
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Response of Isotropic and Laminated Plates to Close Proximity Blast Loads
The transient response of various plate structures subject to blast loads is analyzed. In particular, simply supported isotropic and laminated composite plates are modeled using the commercial finite element code NASTRAN and the method of modal superposition. Both analysis procedures are used to …
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Finite element analysis and experimental validation of reinforced concrete single-mat slabs subjected to blast loads
… of these slabs towards blast loading. A non-linear transient dynamic finite element analysis program LS-DYNA® is used for this study. The finite element models of these 12 slab panels are developed in LS-DYNA® and blast pressures equivalent to those generated in the experiment are applied …
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Plane -Wave Time -Domain Algorithms for Efficient Analysis of Three-Dimensional Transient Wave Phenomena
Computer simulation of linear transient wave phenomena involving structures that reside in an unbounded medium to generate broadband data is of paramount importance in such disciplines as acoustics, electromagnetics, and geophysics. Numerical techniques to perform such simulations call for the …
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Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-Mat Slabs Subjected to Blast Loads
… subjected to blast loading. LS-DYNA®, a non-linear transient dynamic finite element analysis program, was used in this study. Finite element models for twelve slabs using the LS-DYNA® subjected to experimental blast loads were used to study the bond-slip behavior between steel reinforcing …
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The Effect of Impact Damage on the Fatigue Life of Steel
… specimens. Furthermore, three dimensional, non-linear transient numerical models were developed, which were used to show the surface and subsurface residual stresses produced as a result of the impact.<br/><br/>The specimens used in the experimental programme were made from two different types …
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Modeling of the great earthquake seismic cycles
… propagation. The model employs elasticity, non-linear transient viscous rheology, and rate-and-state friction. It generates spontaneous earthquake sequences, and, by using an adaptive time-step algorithm, recreates the deformation process as observed naturally over single and multiple seismic …
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Non-linear finite element thermo-hydrodynamic analysis of oil ring seals used in high pressure centrifugal compressors
… evaluate the oil seal characteristics, perform linear stability analysis of the compressor rotor and nonlinear transient analysis of the compressor rotor and the seal ring has been developed. An iterative finite element method is used to solve the non-linear and coupled hydrodynamic and thermal …
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Revised productivity index equation to improve transient history match for the Capacitance Resistance Model
… a productivity index model that works well in transient flow regime should be investigated. In this thesis, two different productivity models are proposed. The first is the combined productivity index model. This model originates from the analytical solution of single compartment model and the …