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  • 1
    Electronic Resource
    Electronic Resource
    Binding of cis-dichlorodiammine platinum(II) to metallothionein in Ehrlich cells
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 130 (1985), S. 786-792 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(85)90485-1
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  • 2
    Electronic Resource
    Electronic Resource
    Chemistry, cytotoxicity, and DNA-binding of bis-platinum complexes
    Amsterdam : Elsevier
    Journal of Inorganic Biochemistry 36 (1989), S. 160 
    Details
    ISSN: 0162-0134
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0162-0134(89)84048-6
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  • 3
    Electronic Resource
    Electronic Resource
    Experimental analysis of the steady-state behaviour of beam systems with discontinuous support (1996)
    Springer
    Meccanica 31 (1996), S. 293-308 
    Details
    ISSN: 1572-9648
    Keywords: Experimental analysis ; Beam systems ; One-sided spring ; Elastic stop ; Impact ; Periodic solutions ; Bifurcation and chaos
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Sommario Il presente lavoro concerne l'analisi sperimentale del comportamento a regime di travi lineari, su supporti elastici nonlineari discontinui, eccitate periodicamente. L'analisi numerica dei sistemi in esame ha evidenziato risposte subarmoniche, quasi-periodiche e caotiche, nonchè l'esistenza, nel caso di trave con una molla laterale, di tre differenti percorsi verso il caos. La relativa semplicità dei sistemi di travi ha consentito di procedere ad una verifica sperimentale dei risultati numerici e della varietà dei fenomeni nonlineari da essi evidenziati. La corrispondenza fra risultati sperimentali e numerici è molto buona nel caso di risposta subarmonica. Il comportamento caotico sperimentale è stato convalidato attraverso il calcolo degli esponenti di Lyapunov a partire dai relativi dati.
    Notes: Abstract This paper deals with the experimental analysis of the long-term behaviour of periodically excited linear beams supported by a one-sided spring or an elastic stop. Numerical analysis of the beams showed subharmonic, quasi-periodic and chaotic behaviour. Furthermore, in the beam system with the one-sided spring three different routes leading to chaos were found. Because of the relative simplicity of the beam systems and the variety of calculated nonlinear phenomena, experimental setups are made of the beam systems to verify the numerical results. The experimental results correspond very well with the numerical results as far as the subharmonic behaviour is concerned. Measured chaotic behaviour is proved to be chaotic by calculating Lyapunov exponents of experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00426992
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental verification of the steady-state behavior of a beam system with discontinuous support (1996)
    Springer
    Experimental mechanics 36 (1996), S. 159-165 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This article deals with the experimental verification of the long-term behavior of a periodically excited linear beam supported by a one-sided spring. Numerical analysis of the beam showed subharmonic, quasi-periodic, and chaotic behavior. Further, three different routes leading to chaos were found. Because of the relative simplicity of the beam system and the variety of calculated nonlinear phenomena, an experimental setup is made of this beam system to verify the numerical results. The experimental results correspond very well with the numerical results as far as the subharmonic behavior is concerned. Measured chaotic behavior is proved to be chaotic by calculating Lyapunov exponents of experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02328713
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  • 5
    Electronic Resource
    Electronic Resource
    Parameter variation methods for cell mapping (1995)
    Springer
    Nonlinear dynamics 7 (1995), S. 273-284 
    Details
    ISSN: 1573-269X
    Keywords: Cell mapping ; continuation ; basins of attraction ; chaos
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In the study of nonlinear dynamic systems, the influence of system parameters on the long term behaviour plays an important role. In this paper, parameter variation methods are presented which can be used when investigating a nonlinear dynamic system by means of simple or interpolated cell mapping. In the case of coexisting attractors, the proposed methods determine the evolution of the basin boundaries when a system parameter is varied. Application of the methods to a modified Duffing equation is performed. It is concluded that the proposed methods are very efficient and accurate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00046303
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  • 6
    Electronic Resource
    Electronic Resource
    Nonlinear parametric identification using periodic equilibrium states (1995)
    Springer
    Nonlinear dynamics 7 (1995), S. 499-515 
    Details
    ISSN: 1573-269X
    Keywords: Periodic states ; time discretization ; identification ; system modelling ; landing gear
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The subject of this paper is the development and assessment of a new nonlinear parametric identification method for dynamic systems using periodic equilibrium states or outputs. The method consists of a modified Bayesian point estimation technique which can be used in combination with a time discretization method or a shooting method to obtain the periodic equilibrium states. It is assumed that the specific excited and measured periodic solution can be computed directly from a static initial guess. An important feature of this estimator is the possibility to estimate the best parameters based on all experiments of the complete experimental set-up. The choice of using periodic states appears to be computationally efficient compared to using transient states. The new method is applied to multiple sets of nonlinear shaker-test measurements of a uniaxially loaded F-16 nose landing gear damper, for which a standard 1 dof mechanical model and a more comprehensive 2 dof thermo-mechanical model are postulated. Finally, the predictive power of the method is assessed by comparison of predictions for a transient drop-test load case of the ‘best’ 2 dof model with corresponding parameters and real drop-test measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121110
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  • 7
    Electronic Resource
    Electronic Resource
    Stick-Slip Vibrations Induced by Alternate Friction Models (1998)
    Springer
    Nonlinear dynamics 16 (1998), S. 41-54 
    Details
    ISSN: 1573-269X
    Keywords: Stick-slip vibrations ; shooting method ; dry friction ; discontinuous systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In the present paper a simple and efficient alternate friction model is presented to simulate stick-slip vibrations. The alternate friction model consists of a set of ordinary non-stiff differential equations and has the advantage that the system can be integrated with any standard ODE-solver. Comparison with a smoothing method reveals that the alternate friction model is more efficient from a computational point of view. A shooting method for calculating limit cycles, based on the alternate friction model, is presented. Time-dependent static friction is studied as well as application in a system with 2-DOF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008289604683
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  • 8
    Electronic Resource
    Electronic Resource
    Announcement (1998)
    Springer
    Nonlinear dynamics 16 (1998), S. 91-102 
    Details
    ISSN: 1573-269X
    Keywords: feedback linearization ; invariant manifold ; nonlinear dynamics ; vibration control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Vibration reduction in a harmonically excited 1-DOF beam with one-sided spring is realized by control-ling the system state from a stable large amplitude 1/2 subharmonic response towards a coexisting unstable small amplitude harmonic response using feedback linearization. At the unstable harmonic response no control effort is needed because the unstable harmonic response is a long term solution of the uncontrolled system. To reduce control effort when stabilizing the unstable harmonic response, the stable manifold can be used within the control design because at the stable manifold the system state approaches the unstable harmonic response without control effort. Unfortunately, the calculation of this manifold acquires much off-line computational effort while its usage complicates the on-line control design. Therefore, the stable manifold is approximated by the stable eigenvectors of the monodromy matrix. Due to the local validity of the approximation, a two-stage control approach is used. In the first stage, the system state is controlled towards the unstable harmonic response to reach the region where the stable manifold can be approximated accurately by the stable eigenvectors. In the second stage, the system state is controlled towards the stable eigenvectors and approaches the unstable harmonic response with hardly any control effort.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008207931362
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  • 9
    Electronic Resource
    Electronic Resource
    An Approximate Analysis of Dry-Friction-Induced Stick-Slip Vibrations by a Smoothing Procedure (1999)
    Springer
    Nonlinear dynamics 19 (1999), S. 159-171 
    Details
    ISSN: 1573-269X
    Keywords: stick-slip vibrations ; dry friction ; discontinuous systems ; smoothing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper deals with a systematic procedure to find both stable and unstable periodic stick-slip vibrations of autonomous dynamic systems with dry friction. In this procedure, the discontinuous friction forces are approximated by smooth functions. Using the simple shooting method with a stiff-ODE solver, in combination with a path following algorithm, branches of periodic solutions are computed for a changing design variable. For testing purposes, both 1 and 2-DOF autonomous block-on-belt models and a 1-DOF autonomous drill string model from literature are investigated. Comparison of the results shows that the smoothing procedure accurately describes the behavior of the discontinuous systems. The proposed procedure can also easily be applied to more complex MDOF models, as well as to nonautonomous dynamic systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008306327781
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  • 10
    Electronic Resource
    Electronic Resource
    Steady-state behaviour of flexible rotordynamic systems with oil journal bearings (1996)
    Springer
    Nonlinear dynamics 11 (1996), S. 295-313 
    Details
    ISSN: 1573-269X
    Keywords: Flexible rotor-bearing systems ; reduction technique ; two-point boundary value problems ; finite-length bearing theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract This paper deals with the long term behaviour of flexible rotor systems, which are supported by nonlinear bearings. A system consisting of a rotor and a shaft which is supported by one oil journal bearing is investigated numerically. The shaft is modelled using finite elements and reduced using a component mode synthesis method. The bearings are modelled using the finite-length bearing theory. Branches of periodic solutions are calculated for three models of the system with an unbalance at the rotor. Also self-excited oscillations are calculated for the three models if no mass unbalance is present. The results show that a mass unbalance can stabilize rotor oscillations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00120722
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