A Method of Computation for Structural Dynamics

Newmark, N. M.

doi:10.1061/taceat.0008448

Cited by 149 publications

(121 citation statements)

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“…In this study, the generalized-a time integration algorithm proposed by Chung and Hulbert 21 was used. This algorithm can been seen as an evolution of the classical Newmark 22 method, in which better control of the dissipation properties is obtained while retaining second-order accuracy for all values of dissipation.…”

Section: Definition Of the Numerical Modelmentioning

confidence: 99%

Numerical and experimental stress analysis of an internal-combustion engine valve during the closing event

Cavalieri

Luengo

Risso

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper presents a numerical methodology to predict the stress evolution in an internal-combustion engine valve during the closing event. The problem is studied using a three-dimensional finite element model, showing that the seating process of the valve produces high bending stresses which are not demonstrated by two-dimensional models. The valve stem stress response under impact was registered experimentally using strain gauges and then compared with the finite element method solutions, showing good agreement. The main contribution of this paper is the identification of the factors which generate the development of impact stresses during the closing event in an internal- combustion engine valve and which could result in fatigue failure.

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Section: Definition Of the Numerical Modelmentioning

confidence: 99%

Numerical and experimental stress analysis of an internal-combustion engine valve during the closing event

Cavalieri

Luengo

Risso

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…In order to solve the initial value problem of Eqs. ( 65) and ( 66), it is employed the Newmark method [35], which defines the following implicit integration schemė…”

Section: Integration Of Discretized Nonlinear Dynamicsmentioning

confidence: 99%

Computational modeling of the nonlinear stochastic dynamics of horizontal drillstrings

2015

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This work intends to analyze the nonlinear stochastic dynamics of drillstrings in horizontal configuration. For this purpose, it considers a beam theory, with effects of rotatory inertia and shear deformation, which is capable of reproducing the large displacements that the beam undergoes. The friction and shock effects, due to beam/borehole wall transversal impacts, as well as the force and torque induced by bit-rock interaction, are also considered in the model. Uncertainties of bitrock interaction model are taken into account using a parametric probabilistic approach. Numerical simulations have shown that the mechanical system of interest has a very rich nonlinear stochastic dynamics, which generate phenomena such as bit-bounce, stick-slip, and transverse impacts. A study aiming to maximize the drilling process efficiency, varying drillstring velocities of translation and rotation is presented. Also, the work presents the definition and solution of two optimizations problems, one deterministic and one robust, where the objective is to maximize drillstring rate of penetration into the soil respecting its structural limits.

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“…The initial value problem defined by Eqs. ( 6) and ( 7) has its solution approximated by the Newmark method [36,35].…”

Section: Discretization Of the Model Equationmentioning

confidence: 99%

Uncertainty quantification through the Monte Carlo method in a cloud computing setting

Cunha

Nasser

Sampaio

et al. 2014

Computer Physics Communications

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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A Method of Computation for Structural Dynamics

Cited by 149 publications

References 0 publications

Numerical and experimental stress analysis of an internal-combustion engine valve during the closing event

Numerical and experimental stress analysis of an internal-combustion engine valve during the closing event

Computational modeling of the nonlinear stochastic dynamics of horizontal drillstrings

Uncertainty quantification through the Monte Carlo method in a cloud computing setting

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