pyflange.gap

The gap module contains tools for modelling flange gaps.

It corrently contains only one gap model, that is the sinusoidal gap, as defined in ref. [1], section 6.7.5.2.

REFERENCES

  • [1] IEC 61400-6:2020/AMD1:2024 - Wind Energy Generation Systems - Part 6: Tower and foundation design requirements

gap_height_distribution(flange_diameter, flange_flatness_tolerance, gap_length)

Evaluate the gap heigh probability distribution according to ref. [1].

Parameters:
  • flange_diameter (float) –

    The outer diameter of the flange, expressed in meters.

  • flange_flatness_tolerance (float) –

    The flatness tolerance, as defined in ref. [1], expressed in mm/mm (non-dimensional).

  • gap_length (float) –

    The length of the gap, espressed in meters and measured at the outer edge of the flange.
Returns:

The following example, creates a gap distribution and the calculates the 95% quantile of the gap height

from pyflange.gap import gap_height_distribution

D = 7.50      # Flange diameter in meters
u = 0.0014    # Flatness tolerance (non-dimensional)
L = 1.22      # Gap length
gap_dist = gap_height_distribution(D, u, L)     # a lognorm distribution object

u95 = gap_dist.ppf(0.95)    # PPF is the inverse of CDF. See scipy.stats.lognorm documentation.