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  • Articles  (19)
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  • simulation  (19)
  • Springer  (19)
  • 2020-2022
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  • 1997  (19)
  • Mathematics  (10)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (8)
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  • Articles  (19)
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  • 2020-2022
  • 1995-1999  (19)
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  • 1
    Electronic Resource
    Electronic Resource
    Look ahead job demanding for improving job shop performance (1997)
    Springer
    OR spectrum 19 (1997), S. 23-29 
    Details
    ISSN: 1436-6304
    Keywords: Job shop scheduling ; dispatching rules ; coordination ; look ahead information ; simulation ; Werkstattsteuerung ; Steuerungsregeln ; Koordination ; Vorausschauende Informationen ; Simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung In diesem Beitrag wird ein neuartiger Ansatz zur Koordination dezentraler Werkstattsteuerungsregeln vorgestellt und mit Hilfe einer Simulationsstudie analysiert. Die Koordination basiert auf vorausschauenden Informationen und enthält einen Auftragsnachfrage-/-angebotsmechanismus. Die Simulations-experimente zeigen, daß durch den Einsatz des Koordinationsmechanismus die Leistung herkömmlicher Steuerungsregeln signifikant verbessert wird.
    Notes: Abstract In this paper a new coordination approach for decentralized job shop scheduling rules is presented and analyzed in a simulation study. The coordination is based on look ahead information and contains a mechanism for demanding and supplying jobs. The simulation experiments show that the performance of conventional scheduling rules is significantly improved using the coordination mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539802
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  • 2
    Electronic Resource
    Electronic Resource
    Look ahead job demanding for improving job shop performance (1997)
    Springer
    OR spectrum 19 (1997), S. 23-29 
    Details
    ISSN: 1436-6304
    Keywords: Key words: Job shop scheduling ; dispatching rules ; coordination ; look ahead information ; simulation ; Schlüsselwörter: Werkstattsteuerung ; Steuerungsregeln ; Koordination ; Vorausschauende Informationen ; Simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung. In diesem Beitrag wird ein neu-artiger Ansatz zur Koordination dezentraler Werkstattsteuerungsregeln vorgestellt und mit Hilfe einer Simulationsstudie analysiert. Die Koordination basiert auf vorausschauenden Informationen und enthält einen Auftragsnachfrage-/-angebotsmechanismus. Die Simulations- experimente zeigen, daß durch den Einsatz des Koordinationsmechanismus die Leistung herkömmlicher Steuerungsregeln signifikant verbessert wird.
    Notes: Abstract. In this paper a new coordination approach for decentralized job shop scheduling rules is presented and analyzed in a simulation study. The coordination is based on look ahead information and contains a mechanism for demanding and supplying jobs. The simulation experiments show that the performance of conventional scheduling rules is significantly improved using the coordination mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539802
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  • 3
    Electronic Resource
    Electronic Resource
    Object-oriented Analysis with Structured and Integrated Specifications and Solutions (OASISS) for production system control (1997)
    Springer
    Journal of intelligent manufacturing 8 (1997), S. 3-14 
    Details
    ISSN: 1572-8145
    Keywords: Production system analysis ; object-oriented approach ; production control ; simulation ; Petri networks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Tool specification for production system control requires the identification of the main characteristics of the production system. The production systems are varied, and the production control tools (such as scheduling algorithms and resource assignment rules) are often dedicated to only one class of these systems. Tool assessment for production system control requires modelling of the production system. We propose a new approach to production systems, to identify the nature and the complexity of the system according to the classification of Conway et al., and to specify a dynamic model that will allow us to simulate production control decisions. This paper presents this object-oriented approach, which identifies the resources and the organization features of the studied system. It then, proposes some predetermined classes of objects, which enable us to classify the system components and to use pre-existing dynamic models. These dynamic models are based on timed and coloured Petri nets. The overall architecture of our methodology follows three steps: top-down analysis of resources and bottom-up recognition of predetermined objects, instantiation and integration of objects, and implementation of objects. An example illustrates its use in the textile industry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018584132491
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  • 4
    Electronic Resource
    Electronic Resource
    A stochastic method for discrete and continuous optimization in manufacturing systems (1997)
    Springer
    Journal of intelligent manufacturing 8 (1997), S. 405-413 
    Details
    ISSN: 1572-8145
    Keywords: Manufacturing systems ; decision making systems ; simulation ; discrete and continuous optimization ; discrete ψ-transform method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Algorithms for discrete and continuous optimization are a very important part of decision making systems in manufacturing. Most planning, scheduling and layout problems require these algorithms. In practice, research into efficient algorithms meets two principal obstacles. The first one is linked to the fact that quite often the criteria cannot be expressed in an analytic form, so it is not possible to use existing theoretical resolution methods. The second is due to the fact that most of the problems for which the criteria can be represented in analytic form are NP-hard problems. This situation can be simplified using simulation. But the use of simulation and optimization methods together often gives a local optimum. The proposed method in this paper is based on the use of a discrete modification of ψ-transforms jointly with some heuristics for local optimization. The originality of this approach is in the possibility to avoid a local optimum, while using models of simulation for the computation of values of the criteria. An example of the utilization of the method is given: it concerns the optimization of the launching of the parts in production in systems of the job-shop type. The proposed method is compared with a heuristic known to be very good in the same number of simulations. The results of five tests with different model sizes show the efficiency of the proposed method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018558216078
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  • 5
    Electronic Resource
    Electronic Resource
    Intelligent simulation code generator: a relational database management approach (1997)
    Springer
    Journal of intelligent manufacturing 8 (1997), S. 125-136 
    Details
    ISSN: 1572-8145
    Keywords: Artificial intelligence ; simulation ; database management system ; object oriented paradigm ; simulation program generation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Although many studies have illustrated AI-based simulation, the concept of combining databases with AI and simulation is relatively new. Complementing AI and simulation with databases aids in the development of a completely integrated simulation environment that spans the whole simulation life cycle. This study illustrates the design of a simulation program generator, the intelligent simulation code generator (ISCG), which uses a database management system as the user-oriented interface, an object-oriented system to develop the knowledge base and simulation environment, and a target simulation language as the simulation software. The ISCG offers data independence, system independence, simulation-specific transparency, and target language neutrality. Furthermore, the ISCG offers system design flexibility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018556721104
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  • 6
    Electronic Resource
    Electronic Resource
    Experimental evaluation of the classificatory performance of mathematical programming approaches to the three-group discriminant problem: The case of small samples (1997)
    Springer
    Annals of operations research 74 (1997), S. 191-209 
    Details
    ISSN: 1572-9338
    Keywords: integer programming ; discriminant analysis ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract Although there have been several journal articles on the classificatory performance of mathematical programming approaches to the two-group discriminant problem, there has been no simulation study on the classificatory performance of mathematical programming approaches to the multiple-group problem reported in the literature. This study reports the results of a simulation experiment on the classificatory performance of a single-function and a multiple-function mathematical programming model relative to that of the standard parametric procedures for the three-group problem with small training samples. The effect of second-order terms on the classificatory performance of the mathematical programming models for the three-group problem is also investigated. Furthermore, this study theoretically examines the range of parameter values of a multiple-function mathematical programming model for which its number of misclassifications in the training sample cannot exceed that of a single-function model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018918320541
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  • 7
    Electronic Resource
    Electronic Resource
    Enhancing graphical simulation output using cluster analysis (1997)
    Springer
    Annals of operations research 74 (1997), S. 321-332 
    Details
    ISSN: 1572-9338
    Keywords: simulation ; modeling ; aerospace ; air route structure ; free flight ; clustering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract Recent work performed for the Federal Aviation Administration to support the development of future concepts of air traffic management has involved simulation modeling of patterns of airspace usage by commercial and business air traffic. The objective of these efforts has been to investigate the impacts of a pattern of airspace usage known as "free flight", whereby pilots and flight dispatchers have much more freedom to choose, say, direct or wind-optimal routing through airspace. One of the figures of merit investigated is a count of "convergence pairs" as a measure of the complexity of various traffic patterns. These are cases when aircraft in the simulation model fly close to each other. Interestingly, geographic plots of convergence pairs accumulated over time bring out certain features or patterns of congested air traffic flows or flight alignments. However, these plots are also thick with "noise" or extraneous convergence pairs, whose presence detracts from the ability to perceive congested air traffic flows. Cluster analysis has been found to be an effective method of filtering these displays so that the congested flow features are discernible. The process developed for this purpose is based on a two-pass clustering approach. The process has worked well for the simulation modeling performed to date. Classification of the locations of convergence pairs into congested flow corridors is visually appealing, and has helped distinguish differences in contrasting scenarios of airspace usage. The paper presents graphical results and describes the clustering algorithms employed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018986808246
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  • 8
    Electronic Resource
    Electronic Resource
    A System Dynamics Model of Planned Organizational Change (1997)
    Springer
    Computational & mathematical organization theory 3 (1997), S. 151-171 
    Details
    ISSN: 1572-9346
    Keywords: organizational performance ; planned organizational change ; resistance to change ; system dynamics ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper suggests that an induction of change program leads to atemporary impairment of organizational performance. A System Dynamics Modelportrays the process of planned organizational change. A set of keyvariables that facilitate or impede change is identified, quantified, andintegrated into the model. Three data sets, reproduced by simulation,demonstrate that the model is internally consistent and empiricallyadequate. The paper discusses theoretical and practical implications of the‘initial dip’ phenomenon in processes of planned change.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009664618421
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  • 9
    Electronic Resource
    Electronic Resource
    Estimation and testing in least absolute value regression with serially correlated disturbances (1997)
    Springer
    Annals of operations research 74 (1997), S. 239-257 
    Details
    ISSN: 1572-9338
    Keywords: autocorrelation ; L 1 regression ; least absolute deviations ; robust regression ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract Least absolute value (LAV) regression provides a robust alternative to least squares, particularly when the disturbances follow distributions that are nonnormal and subject to outliers. While inference in least squares estimation is well-understood, inferential procedures in the context of LAV estimation have not been studied as extensively, particularly in the presence of non-independent disturbances. In this work, we study three alternative significance test procedures in LAV regression, along with two approaches used to correct for serial correlation. The study is based on large-scale Monte Carlo simulations, and comparisons are made based on both observed significance levels and power.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018974405520
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  • 10
    Electronic Resource
    Electronic Resource
    Impact of Routing Flexibility on the Performance of an FMS—A Simulation Study (1997)
    Springer
    International journal of flexible manufacturing systems 9 (1997), S. 273-298 
    Details
    ISSN: 1572-9370
    Keywords: routing flexibility ; dynamic sequencing and dispatching ; simulation ; Taguchi experimental design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The evolving manufacturing environment is characterized by a drive toward increasing flexibility. One possible manifestation of flexibility within an FMS is in the form of routing flexibility. Providing this typically is an expensive proposition, and system designers therefore aim to provide only the required levels commensurate with a given set of operating conditions. This paper presents a framework based on a Taguchi experimental design for studying the nature of the impact of varying levels of routing flexibility on the performance of an FMS. Simulation results indicate that increases in routing flexibility, when made available at the cost of an associated penalty on operation processing time, is not always beneficial. There is an optimal flexibility level, beyond which system performance deteriorates, as judged by the makespan measure of performance. It is suggested that the proposed methodology can be used in practice for not only setting priorities on specific design and control factors but also for highlighting likely factor level combinations that could yield near-optimal shop performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007917429815
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  • 11
    Electronic Resource
    Electronic Resource
    A Decentralized Approach to Estimate Activity-Based Costs and Near-Optimal Resource Allocation in Flexible Manufacturing Systems (1997)
    Springer
    International journal of flexible manufacturing systems 9 (1997), S. 167-193 
    Details
    ISSN: 1572-9370
    Keywords: flexible manufacturing systems ; decentralization ; stochastic equilibrium ; pricing ; benefits ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Flexible manufacturing systems (FMSs) can apply the efficiencies of large-scale production to small batch production. The coordination of FMS activities is a complex task; this paper presents a decentralized pricing mechanism that can be used to estimate the activity–based costs and manage the activities of the FMS efficiently. The pricing mechanism described in this paper does not require systemwide information to compute prices; instead, the pricing mechanism samples and uses the demand information at each CNC machine to compute rental prices at that machine. We derive the theoretical formula for rental prices supporting the optimal performance and propose simulation studies to estimate the rental prices for real-time price changes in a decentralized manner. Results from a preliminary simulation study indicate that stable rental prices can be estimated and significant improvements can be realized by using the pricing mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007919802284
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  • 12
    Electronic Resource
    Electronic Resource
    Model misspecification in Data Envelopment Analysis (1997)
    Springer
    Annals of operations research 73 (1997), S. 233-252 
    Details
    ISSN: 1572-9338
    Keywords: Data Envelopment Analysis ; model specification ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract The use of Data Envelopment Analysis for estimating comparative efficiency has become widespread, and there has been considerable academic attention paid to the development of variants of the basic DEA model. However, one of the principal weaknesses of DEA is that - unlike statistically based methods - it yields no diagnostics to help the user determine whether or not the chosen model is appropriate. In particular, the choice of inputs and out-puts depends solely on the judgement of the user. The purpose of this paper is to examine the implications for efficiency scores of using a misspecified model. A simple production process is set up. Simulation models are then used to explore the effects of applying misspecified DEA models to this process. The phenomena investigated are: the omission of significant variables; the inclusion of irrelevant variables; and the adoption of an inappropriate variable returns to scale assumption. The robustness of the results is investigated in relation to sample size; variations in the number of inputs; correlation between inputs; and variations in the importance of inputs. The paper concludes that the dangers of misspecification are most serious when simple models are used and sample sizes are small. In such circumstances, it is concluded that it will usually be to the modeller's advantage to err on the side of including possibly irrelevant variables rather than run the risk of excluding a potentially important variable from the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018981212364
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  • 13
    Electronic Resource
    Electronic Resource
    Analysis and design of mechanical crack arrestors for gas pipeline (1997)
    Springer
    Acta mechanica solida Sinica 10 (1997), S. 283-298 
    Details
    ISSN: 0894-9166
    Keywords: fracture mechanics ; finite element ; simulation ; curved beam ; pipeline ; arrest
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Mechanical arrestors are frequently used in gas transmission pipelines to prevent the possibility of long running cracks. These arrestors have the effect of reducing the pipe from opening as the crack passes. This decreases the available crack driving force and, as a result, crack arrest may take place. This essentially is a second line of defence against catastrophic failure in the event crack initiation cannot always be prevented. A novel analyzing method presented in this paper has been developed to investigate the suitability of these crack arrestors. This is based on a fluid/structure/fracture interaction package, PFRAC. A dynamic finite element approach has been developed for a three dimension curved beam with initial plane curvature, which has been implemented in PFRAC to simulate the behaviour of the arrestor. The contact conditions between the pipe wall and the arrestor, along with the various computational procedures, are described. Several numerical results for a cracked pipe with arrestors are presented and compared with those for pipes without arrestors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207792
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  • 14
    Electronic Resource
    Electronic Resource
    Material fracture toughness determination for polyethylene pipe materials using small scale test results (1997)
    Springer
    Acta mechanica Sinica 13 (1997), S. 63-80 
    Details
    ISSN: 1614-3116
    Keywords: fracture mechanics ; pipeline ; experiment ; finite element ; simulation ; fracture toughness ; critical pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The Small-Scale Steady State (S4) test has been recently developed in order to assess the fracture behaviour of polyethylene (PE) gas distribution pipe material during rapid axial crack propagation. Based on an investigation of the S4 test, a simulation model of S4 test has been developed. This paper describes the use of the results obtained from the S4 test and program modified from PFRAC (Pipeline Fracture Analysis Code) to evaluate the fracture toughness of the material,G, which could not be directly obtained from the test, and to predict critical pressure,p c , for rapid crack propagation (RCP) in a full scale PE pipe. The algorithms for contact conditions are developed to consider the opening pipe wall impact against a series containment rings and the capabilities of PFRAC are also extended. WhenG d is evaluated, investigations are made on the effect of temperature, wall thickness and crack velocity. In addition, procedures to evaluate the critical pressure for the S4 test pipe are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02487832
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  • 15
    Electronic Resource
    Electronic Resource
    A Simple and Robust Lognormal Estimator (1997)
    Springer
    Mathematical geology 29 (1997), S. 993-1008 
    Details
    ISSN: 1573-8868
    Keywords: lognormal estimator ; lognormal kriging ; simulation ; conditional unbiasedness ; robustness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract In an open pit mine, the selection of blocks for mill feed necessitates the use of a conditionally unbiased estimator not only to maximize profits, but also to predict precisely the grades at the mill. Estimation of blocks usually is done using a series of blasthole assays on a regular grid. In many instances, the blasthole grades show a lognormal-like distribution. This study examines an estimator based on the hypothesis of bilognormality between the true block grade and the estimate obtained using the blastholes. The properties of the estimator are established and the estimator is proven to be conditionally unbiased. It is almost as precise as the lognormal kriging estimator when the points are multilognormal. However, it is more precise than lognormal krigings when only univariate lognormality is present or when the distribution is not exactly lognormal. The estimator also is shown to be robust to errors in the specifications of the variogram model or of the expectation of Z. Contrary to lognormal krigings, the estimator does only a slight correction to the original estimate obtained using the blastholes assays.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022357502767
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  • 16
    Electronic Resource
    Electronic Resource
    Real-Space Renormalization Estimates for Two-Phase Flow in Porous Media (1997)
    Springer
    Transport in porous media 29 (1997), S. 247-279 
    Details
    ISSN: 1573-1634
    Keywords: effective properties ; relative permeability ; renormalization numerical algorithm heterogeneity ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Technology
    Notes: Abstract We present a spatial renormalization group algorithm to handle immiscibletwo-phase flow in heterogeneous porous media. We call this algorithmFRACTAM-R, where FRACTAM is an acronym for Fast Renormalization Algorithmfor Correlated Transport in Anisotropic Media, and the R stands for relativepermeability. Originally, FRACTAM was an approximate iterative process thatreplaces the L × L lattice of grid blocks, representing the reservoir,by a (L/2) × (L/2) one. In fact, FRACTAM replaces the original L× L lattice by a hierarchical (fractal) lattice, in such a way thatfinding the solution of the two-phase flow equations becomes trivial. Thistriviality translates in practice into computer efficiency. For N=L ×L grid blocks we find that the computer time necessary to calculatefractional flow F(t) and pressure P(t) as a function of time scales as τ∼ N1.7 for FRACTAM-R. This should be contrasted with thecomputational time of a conventional grid simulator τ ∼N2.3. The solution we find in this way is an accurateapproximation to the direct solution of the original problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006593820928
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  • 17
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    Hyperviscosity and Vorticity-Based Models for Subgrid Scale Modeling (1997)
    Springer
    Flow, turbulence and combustion 59 (1997), S. 409-420 
    Details
    ISSN: 1573-1987
    Keywords: turbulence ; simulation ; modeling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Large-eddy simulations corresponding to the decaying isotropic turbulence experiment of Comte-Bellot and Corrsin are performed, using a pseudo-spectral code that incorporates four models: viscosity and hyperviscosity types, each implemented for both the subgrid scale stress tensor and the subgrid scale force. Two 1/T scalings are also considered for the viscosity amplitude. The dynamic procedure is extended to the four models and is tested. Results are obtained with and without this procedure and for both scalings. The main conclusions are: (a) the two viscosity models perform equally well; (b) the Kolmogorov scaling performs as well as the Smagorinsky scaling, yet it is computationally more efficient; (c) in the dynamic procedure, there is a fairly wide range of test to grid filter ratios which produces results insensitive to this ratio; and (d) the hyperviscosity models lead to energy decay curves that follow the experimental data as well as the usual viscosity models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1001179014517
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  • 18
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    Universal Alignment Probabilities and Subset Selection for Ordinal Optimization (1997)
    Springer
    Journal of optimization theory and applications 93 (1997), S. 455-489 
    Details
    ISSN: 1573-2878
    Keywords: Subset selection ; stochastic optimization ; alignment probability ; ordered performance curve ; simulation ; modeling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We examine in this paper the subset selection procedure in the context of ordinal optimization introduced in Ref. 1. Major concepts including goal softening, selection subset, alignment probability, and ordered performance curve are formally introduced. A two-parameter model is devised to calculate alignment probabilities for a wide range of cases using two different selection rules: blind pick and horse race. Our major result includes the suggestion of quantifiable subset selection sizes which are universally applicable to many simulation and modeling problems, as demonstrated by the examples in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022614327007
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  • 19
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    Comparison of Various Techniques for Modelling Flexible Beams in Multibody Dynamics (1997)
    Springer
    Nonlinear dynamics 12 (1997), S. 367-397 
    Details
    ISSN: 1573-269X
    Keywords: Flexible ; simulation ; multibody ; dynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The modelling of flexible elements in mechanical systems has been widely investigated through several methods issuing from both the area of structural mechanics and the field of multibody dynamics. As regards the latter discipline, beside the problem of the generation of the multibody equations of motion, the choice of a spatial discretization method for modelling flexible elements has always been considered as a critical phase of the modelling. Although this subject is abundantly tackled in the open-literature, the latter probably lacks an objective comparison between the most commonly used approaches. This contribution presents an extensive investigation of several discretization techniques of flexible beams, in a pure multibody context. In particular, it is shown that shape functions based on power series monomials are very suitable and versatile to model beams being part of a multibody system and thus constitutes an interesting alternative to finite element analysis. For this purpose, a symbolic multibody program, in which various discretization techniques were implemented, was generalized to compute the equations of motion of a general multibody system containing flexible beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008204330035
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