Searched for: subject%3A%22computer%255C%2Bprograms%22
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Juhas, Pavol (author), Louwen, Jaap N. (author), van Eijck, L. (author), Vogt, Eelco T.C. (author), Billinge, Simon J.L. (author)
journal article 2018
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Vink, W.J. (author), de Jonge, J.B. (author)
The present report is part of a "Manual" on aircraft loads, that is being prepared by NLR. It contains a computer program, to be used in combination with "MATLAB4 for Windows" (Student Edition) software, to study aircraft loading due to turbulence. It includes a simple aircraft response model with two rigid and three flexible symmetric degrees...
report 1997
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Kung Chen, S. (author), Stive, M.J.F. (author), Toms, G. (author)
conference paper 1995
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Richmond, M.J. (author), de Koning, A.U. (author)
Utilising the NLR Stripyield cycle-by-cycle fatigue crack growth model a basic description of the time dependent effects associated with periods of constant load level has been added to model Fatigue-Creep interactions. An outline of the basic Creep model is given along with flow diagrams of the sub programs added to the Stripyield model. Other...
report 1993
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Moek, G. (author)
In this report, the application of estimation theory to three problems from aerospace research is described. The applications considered deal with spacecraft attitude estimation, software reliability modelling and estimation, and with a satellite-based navigation algorithm. Maximum likelihood estimation is used in the software reliability case...
report 1991
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De Borst, R. (author), Roddeman, P.G. (author)
journal article 1991
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Booij, N. (author)
Manual for DUCHESS (Delft University Computer program for 2-dimensional Horizontal Estuary and Sea Surges).
report 1990
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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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Olthoff, J. (author)
This report provides an inventory of computer programs for composite materials which are owned by or known to the members of the NFK-TVK action group. The programs are divided in four groups: general laminate theory; specific laminate problems; general (F.E.) analysis programs; miscellaneous problems. The programs are not discussed in the report...
report 1990
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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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Buijsen, F.A. (author), Kassies, A. (author), Boerstoel, J.W. (author)
The results of calculations of two- and three-dimensional flows on blocked grid domains consist of vast data collections with a simple, regular structure. The inspection of these results can only be done efficiently by graphical means, and by exploiting the regular structure of the data. There is a large similarity between the format of the...
report 1988
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Kat, P.J. (author), Donker, J.C. (author)
NEXT 1.2 is an expert system shell developed at NLR. NEXT has a knowledge representation mechanism based on a combination of context tree and production rules. The inference mechanism is based on a combination of backward and forward reasoning. NEXT 1.2 is available on a CYBER 180/855 under NOS and on a VAX under VMS. Supply of other...
report 1987
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Visser, J. (author)
The PROCRU (Procedure Oriented Crew) model has been developed for the analysis and modeling of flight crew procedures during an ILS approach. The model's specific capability concerns the generation of "timelines" of the necessary actions to be carried out by each crew member during the approach. Besides, also the corresponding timelines for...
report 1987
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Schuring, J. (author)
Current design methods for digital control systems to be operated in a continuous environment do not always result in the most efficient use of digital computing hardware. To improve this situation, a dedicated frequency response analysis method was developed for hybrid systems. For practical use of the method, it has been expanded to an...
report 1987
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Lof, C.J. (author)
Computer programs are described to be used for fracture control purposes. Crack growth lifetimes can be predicted for plane cracks in 3-D structures. Values for stress intensity (K-) distributions at crack fronts are derived from data being available from literature for a restricted number of simple configurations. For arbitrary configurations...
report 1986
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Vlieger, H. (author)
Some consequences of application of the current damage tolerance airworthiness requirements for transport aircraft in designing stiffened-skin structures to be safe under all operational load conditions are discussed. Compliance with these requirements may be shown by analysis supported by test evidence. To provide the designer with analytical...
report 1986
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Veldman, A.E.P. (author), Vogels, M.E.S. (author)
A mathematical model is presented for the description of axisymmetric three-dimensional transient flow of a viscous liquid in a partially filled cylindrical container under low gravity conditions. The mathematical model consists of the Navier-Stokes equations with either no-slip condition at the solid boundaries, and with the continuity of...
report 1986
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Hoeijmakers, H.W.M. (author)
In part I of this report a method is described for computing the incompressible flow about slender, thin wings with leading-edge vortex separation. It is assumed that both the wing and the flow field are symmetric with respect to the x—z plane. The method can handle delta—like wings of quite general planform and shape. However, in the...
report 1986
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Kupras, L.Krystyn (author)
report 1986
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Hoeijmakers, H.W.M. (author)
In this report an approximate method is described for computing, through the unsteady analogy, the shape of steady vortex wakes downstream of aircraft configurations in steady flight. In the analogy the steady fully three-dimensional problem is reduced to a two-dimensional timedependent problem, corresponding to the evolution of a two...
report 1985
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