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Representation of geometric stiffening in multibody system simulation
Author(s) -
Wallrapp Oskar,
Schwertassek Richard
Publication year - 1991
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620320818
Subject(s) - stiffening , multibody system , constraint (computer aided design) , representation (politics) , computer science , equations of motion , generality , inertial frame of reference , control theory (sociology) , engineering , structural engineering , classical mechanics , mechanical engineering , physics , artificial intelligence , control (management) , politics , political science , law , psychology , psychotherapist
Abstract Geometric, rotational or dynamic stiffening is a well and long known phenomenon in the analysis of flexible bodies. In multibody dynamics the effect has attracted attention only recently. The objective of this paper is to contribute to the understanding of the modelling of geometric stiffening in multibody system simulation. Today's methods for modelling the effect assume that the (applied) stresses in a flexible system body are zero in its reference configuration, in which it performs large overall motions. The corresponding inertial loads are shown to be balanced by constraint stresses. This can be seen easily when formulating the system equations of motion for non‐zero reference stresses. As a result one obtains an efficient alternative to compute the geometric stiffening terms. The method increases the generality of flexible body models for multibody system simulation.