Πλοήγηση ανά Θέμα "Numerical methods"
Αποτελέσματα 21-40 από 52
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Experimental and numerical study of the behaviour of high dissipation metallic devices for the strengthening of existing structures
(2011)The use of steel bracing systems for the strengthening of existing reinforced concrete (RC) frames may lead to increase of both strength and stiffness. However, in most of the cases the main target is the increase of the ... -
Experimental validation of the dual Kalman filter for online and real-time state and input estimation
(2015)In this study, a novel dual implementation of the Kalman filter is proposed for simultaneous estimation of the states and input of structures via acceleration measurements. In practice, the uncertainties stemming from the ... -
Experimental validation of the dual kalman filter for online and real-time state and input estimation
(2015)In this study, a novel dual implementation of the Kalman filter is proposed for simultaneous estimation of the states and input of structures via acceleration measurements. In practice, the uncertainties stemming from the ... -
Experimental validation of the Kalman-type filters for online and real-time state and input estimation
(2017)In this study, a novel dual implementation of the Kalman filter proposed by Eftekhar Azam et al. (2014, 2015) is experimentally validated for simultaneous estimation of the states and input of structural systems. By means ... -
Introducing a new hall effect sensor - Novel dynamic offset reduction method
(2011)Silicon Hall plates show an offset of a few millitesla. A large portion of this offset is caused by mechanical stress in the device. The offset can be reduced when the spinning-current principle is applied. In this paper ... -
Liner wrinkling in offshore steel lined pipes during reeling installation
(2021)A three-dimensional numerical model of a mechanically bonded lined pipe is developed, simulating its structural response during the reeling installation method. An installation/failure–repair scenario is considered with ... -
Model-reduction techniques for reliability-based design problems of complex structural systems
(2016)This work presents a strategy for dealing with reliability-based design problems of a class of linear and nonlinear finite element models under stochastic excitation. In general, the solution of this class of problems is ... -
A non-local plasticity model for porous metals with deformation-induced anisotropy: Mathematical and computational issues
(2021)A non-local (gradient) plasticity model for porous metals that accounts for deformation-induced anisotropy is presented. The model is based on the work of Ponte Castañeda and co-workers on porous materials containing ... -
Nonlinear model updating through a hierarchical Bayesian modeling framework
(2022)A new time-domain probabilistic technique based on hierarchical Bayesian modeling (HBM) framework is proposed for calibration and uncertainty quantification of hysteretic type nonlinearities of dynamical systems. Specifically, ... -
Nonlinear Model Updating Using Recursive and Batch Bayesian Methods
(2020)This paper studies the performance of recursive and batch Bayesian methods for nonlinear model updating. Unscented Kalman filter (UKF) is selected to represent the recursive Bayesian method, and two UKF approaches are ... -
Numerical implementation of bounding-surface model for simulating cyclic inelastic response of metal piping components
(2021)The present paper describes the numerical implementation of the bounding-surface cyclic-plasticity model in a finite element environment, suitable for simulating the structural behavior of metal components subjected to ... -
A numerical model for aggregations formation and magnetic driving of spherical particles based on OpenFOAM®
(2017)Background and objective This work presents a numerical model for the formation of particle aggregations under the influence of a permanent constant magnetic field and their driving process under a gradient magnetic field, ... -
Numerical Simulation of Damage on Cementitious Sprayed Fire-Resistive Materials Applied on Steel Plates
(2019)Cementitious Sprayed Fire Resistive Materials (SFRMs) are extensively employed for the fire protection of steel structural members due to their cost-effective fire proofing capabilities. They are susceptible, however, to ... -
On the Derivation of the Nonlinear Discrete Equations Numerically Integrating the Euler PDEs
(1998)The Euler equations, namely a set of nonlinear partial differential equations (PDEs), mathematically describing the dynamics of inviscid fluids are numerically integrated by directly modeling the original continuous-domain ... -
On the magnetic aggregation of Fe3O4 nanoparticles
(2021)Background and objective In-vivo MRI-guided drug delivery concept is a personalized technique towards cancer treatment. A major bottleneck of this method, is the weak magnetic response of nanoparticles. A crucial improvement ... -
Optimal accelerated SOR-like (ASOR) method for singular symmetric saddle point problems
(2020)In a recent paper a new iterative method for the solution of the nonsingular symmetric saddle point problem was proposed (Njeru and Guo, 2016). The ASOR method belongs to the family of the SOR-like methods and uses two ... -
Output-only fatigue prediction of uncertain steel structures
(2016)A fatigue estimation framework for steel structures is proposed in this study, under realistic assump-tions on the sensor network capacity and under the premise of uncertainty in the structural information available ... -
Overbreak risk assessment in the Athens metro TBM tunnels
(2004)Assessment of IBM tunneling conditions and potential for damage in building and archaeological remains is of greatest benefit in resolving problems associated with the construction of the Athens Metro, Greece. In this ... -
Performance evaluation of a production line operated under an echelon buffer policy
(2018)We consider a production line consisting of several machines in series separated by intermediate finite-capacity buffers. The line operates under an Echelon Buffer (EB) policy according to which each machine can store the ... -
Phenomenological simulation of the seismic response of ground stabilized with colloidal silica
(2014)Passive stabilization is a novel technique for mitigating the risk of seismic liquefaction in the non-cohesive foundation soil of existing structures. It entails the low-gradient injection of colloidal silica in the soil ...