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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 54 (1984), S. 1-15 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersicht In den klassischen Mehrkörpersystemmodellen, welche man in der Fahrzeugdynamik verwendet, werden die Kräfte, die vom Kontaktpunkt her auf die Räder einwirken, als äußere Kräfte betrachtet und müssen bei jeder besonderen Anwendung in analytischer Form gegeben werden. Hinzu kommt noch, daß im Falle, wo geometrische Zwangsbedingungen auftreten, weil mehrere Räder mit einem unebenen Fahrweg in Kontakt sind, diese auch analytisch bestimmt sein müssen. Dieser Artikel stellt ein Mehrkörpersystemmodell vor, in welchem jeder Rad-Bodenkontakt als eine interne Bindung des Systems betrachtet wird. Einigen dieser geometrischen Zwangsbedingungen wird mittels sogenannter geschlossener kinematischer Schleifen Rechnung getragen, und sie werden automatisch mit Hilfe eines Rechnerprogramms generiert. Die restlichen Zwangsbedingungen haben eine einfache Form und erlauben eine gesetzmäßige Eingabe der Kontaktkräfte sowie der Charakteristiken des Fahrweges. Die Bewegungsgleichungen eines Zweiradsystems, welches sich in einer Ebene auf einem nicht-geradlinigen Fahrweg fortbewegt, werden abgeleitet, um diese Methode zu illustrieren.
    Notes: Summary In the classical multibody models which are used for vehicle dynamics, the contact forces applied to the wheels are considered as external forces and must be supplied in analytical from for each particular application. Moreover, when geometrical constraints arise because several wheels are in contact with a non-planar rolling path, they also have to be specified analytically. This paper presents a multibody model where each wheel-ground contact is considered as an internal joint of the system. Some of the geometrical constraints are taken into account by means of “closed-loops” and generated automatically by a programme. The remaining constraints have a simple expression and allow the contact forces and the characteristics of the rolling-path to be introduced in a straightforward manner. The equations of motion of a two-wheel system moving in a plane on a non-rectilinear path are derived to illustrate the method.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 44 (1975), S. 281-290 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersicht Es werden die Gleichgewichtslagen eines deformierbaren drehenden Satelliten untersucht. Das Modell des Satelliten besteht aus drei miteinander verbundeneu starren Körpern, von denen zwei als erstarrt gedachte Kabel oder Balken betrachtet werden. Die Gleichgewichtsbedingungen und die Stabilitätskriterien dieses Systems werden mit Hilfe des Formalismus der Mehrkörpersystemtheorie abgeleitet. Auf diese Weise werden alle diejenigen Gleichgewichtslagen bestimmt, die nicht von vornherein offensichtlich instabil sind.
    Notes: Summary The equilibrium configurations of a deformable spinning satellite are investigated. The system is modelled by three interconnected rigid bodies, two of them having the characteristics of rigidified cables or beams. The equilibrium conditions and stability criteria of this particular system are provided by the multibody formalism. Using these conditions, all the equilibrium configurations which can not a priori be found to be unstable are determined.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 32 (1991), S. 1621-1635 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The aim of this paper is to present the equations of motion of deformable multi-body systems in a compact form which is suitable for symbolic generation. Particular attention is paid to obtaining the various equations corresponding to joint displacements and body deformations in a unified manner. A large number of common intermediate terms are identified and appropriately assembled in the final form of the equations; for the various applications, this simple consideration permits one to drastically save on the computational effort. This paper also presents the data which are necessary to completely formulate the problem when the body deformations are described by a linear elasticity model (obtained from a modal or finite element description).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 1975-01-01
    Print ISSN: 0020-1154
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 5
    Publication Date: 1984-01-01
    Print ISSN: 0020-1154
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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