A complete strategy for efficient and accurate multibody dynamics of flexible structures with large lap joints considering contact and friction

Florian Pichler, Wolfgang Witteveen, Peter Fischer

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

This paper deals with the dynamics of jointed flexible structures in multibody simulations. Joints are areas where the surfaces of substructures come into contact, for example, screwed or bolted joints. Depending on the spatial distribution of the joint, the overall dynamic behavior can be influenced significantly. Therefore, it is essential to consider the nonlinear contact and friction phenomena over the entire joint. In multibody dynamics, flexible bodies are often treated by the use of reduction methods, such as component mode synthesis (CMS). For jointed flexible structures, it is important to accurately compute the local deformations inside the joint in order to get a realistic representation of the nonlinear contact and friction forces. CMS alone is not suitable for the capture of these local nonlinearities and therefore is extended in this paper with problem-oriented trial vectors. The computation of these trial vectors is based on trial vector derivatives of the CMS reduction base. This paper describes the application of this extended reduction method to general multibody systems, under consideration of the contact and friction forces in the vector of generalized forces and the Jacobian. To ensure accuracy and numerical efficiency, different contact and friction models are investigated and evaluated. The complete strategy is applied to a multibody system containing a multilayered flexible structure. The numerical results confirm that the method leads to accurate results with low computational effort.

Originalspracheenglisch
Seiten (von - bis)407-436
Seitenumfang30
FachzeitschriftMultibody System Dynamics
Jahrgang40
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 1 Aug 2017

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Flexible Structure
Multibody Dynamics
Flexible structures
Component Mode Synthesis
Friction
Contact
Multibody Systems
Reduction Method
Bolted joints
Flexible multibody Dynamics
Spatial distribution
Substructure
Spatial Distribution
Dynamic Behavior
Derivatives
Strategy
Entire
Nonlinearity
Derivative
Numerical Results

Schlagwörter

    ASJC Scopus subject areas

    • !!Modelling and Simulation
    • !!Aerospace Engineering
    • !!Mechanical Engineering
    • !!Computer Science Applications
    • !!Control and Optimization

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    A complete strategy for efficient and accurate multibody dynamics of flexible structures with large lap joints considering contact and friction. / Pichler, Florian; Witteveen, Wolfgang; Fischer, Peter.

    in: Multibody System Dynamics, Jahrgang 40, Nr. 4, 01.08.2017, S. 407-436.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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