Cable property definition

@CABLE_PROPERTY_DEFINITION {
@CABLE_PROPERTY_NAME {CblPropName} {
@ETA_COORDINATE {η} {
@MASS_PER_UNIT_SPAN {m00}
@AXIAL_STIFFNESS {S}
@CABLE_PRE_TENSION {T}
@DAMPING_COEFFICIENT {μs}
@COMMENTS {CommentText}
}
}
}

NOTES

  1. The physical mass and stiffness properties of cables are defined in this section. The properties of the cable are allowed to vary along its span. For this purpose, a number of property sets nset will be defined at specific η locations along the curve defining the geometry of the cable. For a cable with constant properties, use nset = 1 and η = 0.0. For cables with varying properties, property sets must be defined at η = 0.0 and η = 1.0, with any number of additional intermediate values. All η values must appear in ascending order of η. Plots of the cable physical properties will be generated, if requested by the plotting control parameters.
  2. The structural properties of the cable are its mass per unit length, m00, and its axial stiffness, S.
  3. The cable pretension, T, is used only in static analysis as a means of overcoming the singularities associated with cable structures.
  4. Damping in the cable can be modeled by viscous forces Fd proportional to the strain rate, Fd = μs S de/dt, where μs is the damping coefficient, e the strain, and S the cross-sectional stiffness coefficient. Fd, e, and S are all measured in the material basis.