DIKUL - logo
(UL)
  • On the modeling of a spatially curved cable and casing with a focus on their interaction [Elektronski vir]
    Otrin, Miha ; Boltežar, Miha
    The paper presents an approach to the vibration modeling of a spatially curved steel wire and casing with a focus on the contact between the outer casing and the inner steel wire. For the ... mathematical model of the steel wire and the outer casing, the Euler-Bernoulli beam theory with no axial pre-load is used, and for the discretization, finite elements are used. The excitation of the steel wire and the outer casing is in the form of random kinematic excitation. For the energy dissipation the proportional viscous damping model in terms of the Rayleigh coefficient is used. The damping parameters are identified from the Nyquist diagram and from the continuous wavelet transform. For the identification of the frequency dependence of the dynamic modulus of elasticity a method is proposed that uses the measured natural frequencies and the experimentally determined natural modes. The contact between the steel wire and the outer casing is modeled using the penalty method with the friction in a tangential direction. The correlation analysis was made to establish the influence of the geometrical and material parameters of the cable and the casing on the vibration transmission. We show that higher values of the friction coefficient have a significant influence on lowering the level of vibration transmission. The model also predicts that the dynamic modulus of the elasticity of a steel wire does not have a major influence on the level of vibration transmission, which was also validated by experiment. On the basis of an experimental validation the model of a steel wire with an outer casing proved to be suitable for the prediction of the vibration transmission.
    Vir: Proceedings [Elektronski vir] (10 str.)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 10987291

Vnos na polico