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Nonlinear planar modeling of massive taut strings travelled by a force-driven point-mass

Abstract

The planar response of horizontal massive taut strings, travelled by a heavy point-mass, either driven by an assigned force, or moving with an assigned law, is studied. A kinematically exact model is derived for the free boundary problem via a variational approach, accounting for the singularity in the slope of the deflected string. Reactive forces exchanged between the point-mass and the string are taken into account via Lagrange multipliers. The exact model is consistently simplified via asymptotic analysis, which leads to condense the horizontal displacement as a passive variable. The dynamic increment of tension, with respect the static one, is neglected in the governing equations, but evaluated a posteriori, as a higher-order quantity in a perturbation perspective. The equations are solved and rearranged in the form of an integral equation coupled with an integro-differential equation, thus extending a procedure already introduced in the literature. Numerical results, showing the importance of the horizontal reactive force on the quality of motion, are discussed, generalizing those relevant to massless strings.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
NONLINEAR DYNAMICS no. 97, pages 2201 - 2218,
ISSN: 0924-090X
Language:
English
Publication year:
2019
Bibliographic description:
Feretti M., Gavrilov S., Eremeev V., Luongo A.: Nonlinear planar modeling of massive taut strings travelled by a force-driven point-mass// NONLINEAR DYNAMICS. -Vol. 97, iss. 4 (2019), s.2201-2218
DOI:
Digital Object Identifier (open in new tab) 10.1007/s11071-019-05117-z
Verified by:
Gdańsk University of Technology

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