The cables-to-payload mass ratio can be about 20% for aerospace structures. To ensure a successful mission, predicting the vibrations response of cable-harnessed structures is critical. It is commonplace in industry to account for the added mass of these cables and ignore the stiffness effects; however this leads to inaccurate models. The presented paper studies string-harnessed structures as a means for modeling the mass and stiffness effects of aerospace cables; damping is neglected. As periodic wrapping patterns have been modeled using a homogenization theory and experimentally validated, a natural progression of research is the study of nonperiodic wrapping patterns, which is the focus throughout this paper. A spatially dependent equation of motion is derived for the transverse vibrations of a string-harnessed structure. The equation of motion is similar in form to a spatially dependent Euler–Bernoulli beam model. The Lindstedt–Poincaré method is used to determine the frequencies and mode shapes of the system, which are then used to calculate the frequency response function. It is observed that the frequency response functions of the perturbation theory are in good agreement with experimental results.
Continuum Modeling of Nonperiodic String-Harnessed Structures: Perturbation Theory and Experiments
AIAA Journal ; 57 , 4 ; 1736-1751
2018-12-28
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Towards Modeling of Cable-Harnessed Structures: Cable Damping Experiments
British Library Conference Proceedings | 2013
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