The cable cannot resist the axial compressive force that may be induced during large amplitude vibration. In this paper, the effect of cable loosening on nonlinear vibrations is discussed by using the finite difference method that can express the cable loosening. Flexural rigidity and damping of the cable are considered in the equations of motion of a cable in order to handle the numerical instability. Furthermore, nonlinear vibration properties are evaluated for various parameters under periodic and step vertical loading.
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