Searched for: author%3A%22De+Boer%2C+A.%22
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De Boer, A. (author)
Introduction (chapter 1) In analysis software models the infrastructural constructions are often reduced to geometrical linear and surface models (plane stress and shell models). The selection of a model much depends on the speed of the analysis process and the total processing time. The increased computer power has boosted the visualisation of...
doctoral thesis 2010
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De Boer, A. (author)
doctoral thesis 2008
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Hoogenboom, P.C.J. (author), De Boer, A. (author)
Reinforcement in a concrete structure is often determined based on linear elastic stresses. This paper considers computation of the required reinforcement when these stresses have been determined by the finite element method with volume elements. Included are both tension reinforcement and compression reinforcement, multiple load combinations...
journal article 2008
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De Boer, A. (author), Van der Schoot, M.S. (author), Bijl, H. (author)
A new point-by-point mesh movement algorithm is developed for the deformation of unstructured grids. The method is based on using radial basis function, RBFs, to interpolate the displacements of the boundary nodes to the whole flow mesh. A small system of equations has to be solved, only involving the nodes on the boundary of the flow domain....
conference paper 2006
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De Boer, A. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)
In fluid-structure interaction simulations the meshes at the fluid-structure interface usually do not match, because of the different mesh requirements for the flow and structure. The exchange of data over the discrete interface becomes then far from trivial. In this paper we investigate the difference in accuracy and efficiency between a...
conference paper 2006
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De Boer, A. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)
In fluid-structure interaction simulations the meshes at the fluid-structure interface usually do not match, because of the different mesh requirements for the flow and structure. The exchange of data over the discrete interface becomes then far from trivial. In this paper we investigate the difference in accuracy and efficiency between a...
conference paper 2006
document
De Boer, A. (author), Van der Schoot, M.S. (author), Bijl, H. (author)
A new point-by-point mesh movement algorithm is developed for the deformation of unstructured grids. The method is based on using radial basis function, RBFs, to interpolate the displacements of the boundary nodes to the whole flow mesh. A small system of equations has to be solved, only involving the nodes on the boundary of the flow domain....
conference paper 2006
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Hagmeijer, R. (author), de Boer, A. (author), Tinga, T. (author), ten Hoeve, H.J. (author)
An overview of the activities on integrated analysis of gas turbine components at the National Aerospace Laboratory NLR in the Netherlands is presented. Key elements are the multidisciplinary frame-work including Engine System Performance, Fluid Dynamics Analysis, Heat Flow Analysis, Stress Analysis and Life Assessment, and a complementary...
report 2000
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Tober, E. (author), Veldhuis, S. (author), Posthuma de Boer, A. (author)
Abstract of NL 1001959 (C2) Process for converting agricultural products, especially flower bulbs such as tulip bulbs and narcissus bulbs, into useful products, comprises subjecting a combination of agricultural materials as source of starch, water and cellulose to a hot pressing treatment at elevated pressure and temperature for a predetermined...
patent 1997
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de Boer, A. (author), van Woerkom, P.Th.L.M. (author)
report 1994
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van Woerkom, P.T.L.M. (author), de Boer, A. (author), Ellenbroek, M.H.M. (author), Wijker, J.J. (author)
A brief description is given of the European Robot Arm (ERA), and its intended application to assembly, maintenance, and servicing of the Russian segment of the International Space Station Alpha. The need for manipulator simulation is recalled, and ERA simulator development is outlined. System characteristics that must be modelled for...
report 1994
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de Boer, A. (author), van Woerkom, P.T.L.M. (author)
report 1993
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Ellenbroek, M.H.M. (author), de Boer, A. (author)
Fokker Space and Systems and the National Aerospace Laboratory NLR performed a study to integrate more systematically the experimental and analytical analysis of the dynamic behaviour of structures. The study focused on the correlation of experimental and analytical data, matrix and parameter updating methods. In this paper an overview will be...
report 1993
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van Woerkom, P.T.L.M. (author), de Boer, A. (author)
report 1992
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de Boer, A. (author), Ellenbroek, M.H.M. (author)
A description is given of the second problem, a clamped-free truss structure, defined in the GARTEUR Action Group 11. The measured and calculated modal data of the structure are correlated, the locations of the errors are determined and finally the finite element model of the structure is updated. These analyses are performed with the B2000...
report 1990
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Ellenbroek, M.H.M. (author), Wijker, J.J. (author), de Boer, A. (author)
At Fokker Space and Systems the measured and calculated modal data of an ARA 3-panel-clean-wing were correlated. The number of degrees of freedom (dof's) of the finite element model (FEM) is about 6400 and of the measurement 32. Three methods were used to obtain corresponding dof's namely: 1) the number of dof's of the FEM was reduced with a...
report 1989
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Dieleman, P. (author), de Boer, A. (author)
This technical note gives the results of the work carried out in the workpackage on Compliance Matrix Determination (WP 2202) as carried out by NLR during the HERA phase CO contract. During operations with the HErmes Robot Arm (HERA) situations will occur in which the End-Effector (EE) of the manipulator has mechanical interaction with its...
report 1989
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Riks, E. (author), Merazzi, S. (author), de Boer, A. (author)
In many practical problems of plate and shell buckling, the pre-buckling state is linear and can be obtained from the linearized equations of elasticity. The computation of the buckling load and mode in such cases correponds to a linear eigenvalue problem that can easily be formulated and implemented in a finite element code. This report...
report 1988
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de Boer, A. (author), Riks, E. (author)
In this report a description is given of the nonlinear package of B2000. The set-up of the continuation procedure which controls the nonlinear calculations is explained. At some points the existing continuation procedure was modified to enhance its performance. The nonlinear package contains a nonlinear rod element and a nonlinear thick shell...
report 1988
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Posthuma de Boer, A. (author)
public lecture 1988
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