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'''
Created on 24/04/2014
@author: MMPE
'''
from __future__ import print_function
from __future__ import unicode_literals
from __future__ import division
from __future__ import absolute_import
from io import open
from builtins import range
from builtins import int
from future import standard_library
standard_library.install_aliases()
import numpy as np
class StFile(object):
"""Read HAWC2 St (beam element structural data) file
Methods are autogenerated for:
- r : curved length distance from main_body node 1 [m]
- m : mass per unit length [kg/m]
- x_cg : xc2-coordinate from C1/2 to mass center [m]
- y_cg : yc2-coordinate from C1/2 to mass center [m]
- ri_x : radius of gyration related to elastic center. Corresponds to rotation about principal bending xe axis [m]
- ri_y : radius of gyration related to elastic center. Corresponds to rotation about principal bending ye axis [m]
- xs : xc2-coordinate from C1/2 to shear center [m]. The shear center is the point where external forces only contributes to pure bending and no torsion.
- ys : yc2-coordinate from C1/2 to shear center [m]. The shear center is the point where external forces only contributes to pure bending and no torsion.
- E : modulus of elasticity [N/m2]
- G : shear modulus of elasticity [N/m2]
- Ix : area moment of inertia with respect to principal bending xe axis [m4]. This is the principal bending axis most parallel to the xc2 axis
- Iy : area moment of inertia with respect to principal bending ye axis [m4]
- K : torsional stiffness constant with respect to ze axis at the shear center [m4/rad]. For a circular section only this is identical to the polar moment of inertia.
- kx : shear factor for force in principal bending xe direction [-]
- ky : shear factor for force in principal bending ye direction [-]
- A : cross sectional area [m2]
- pitch : structural pitch about z_c2 axis. This is the angle between the xc2 -axis defined with the c2_def command and the main principal bending axis xe.
- xe : xc2-coordinate from C1/2 to center of elasticity [m]. The elastic center is the point where radial force (in the z-direction) does not contribute to bending around the x or y directions.
- ye : yc2-coordinate from C1/2 to center of elasticity [m]. The elastic center is the point where radial force (in the
The autogenerated methods have the following structure
Parameters:
-----------
radius : int, float, array_like or None, optional
Radius/radii of interest\n
If int, float or array_like: values are interpolated to requested radius/radii
If None (default): Values of all radii specified in st file returned
Sub set number
Examples
--------
>>> stfile = StFile(r"tests/test_files/DTU_10MW_RWT_Blade_st.dat")
>>> print (stfile.m()) # Interpolated mass at radius 36
[ 1189.51054664 1191.64291781 1202.76694262 ... 15.42438683]
>>> print (st.E(radius=36, mset=1, set=1)) # Elasticity interpolated to radius 36m
>>> print (st.E(radius=36, mset=1, set=2)) # Same for stiff blade set
8.722924514652648e+17
"""
def __init__(self, filename):
with open (filename) as fid:
txt = fid.read()
# Some files starts with first set ("#1...") with out specifying number of sets
# no_maindata_sets = int(txt.strip()[0])
# assert no_maindata_sets == txt.count("#")
self.main_data_sets = {}
for mset in txt.split("#")[1:]:
mset_nr = int(mset.strip().split()[0])
set_data_dict = {}
for set_txt in mset.split("$")[1:]:
set_lines = set_txt.split("\n")
set_nr, no_rows = map(int, set_lines[0].split()[:2])
assert set_nr not in set_data_dict
set_data_dict[set_nr] = np.array([set_lines[i].split() for i in range(1, no_rows + 1)], dtype=np.float)
self.main_data_sets[mset_nr] = set_data_dict
for i, name in enumerate("r m x_cg y_cg ri_x ri_y x_sh y_sh E G I_x I_y I_p k_x k_y A pitch x_e y_e".split()):
setattr(self, name, lambda radius=None, mset=1, set=1, column=i: self._value(radius, column, mset, set))
def _value(self, radius, column, mset_nr=1, set_nr=1):
st_data = self.main_data_sets[mset_nr][set_nr]
if radius is None:
if radius is None:
return r
return r[np.argmin(np.abs(r - radius))]
def to_str(self, mset=1, set=1):
d = self.main_data_sets[mset][set]
return "\n".join([("%12.5e "*d.shape[1]) % tuple(row) for row in d])
import os
st = StFile(os.path.dirname(__file__) + r"/tests/test_files/DTU_10MW_RWT_Blade_st.dat")
print (st.E(radius=36, mset=1, set=1)) # Elastic blade
print (st.E(radius=36, mset=1, set=2)) # stiff blade
#print (st.radius())
xyz = np.array([st.x_e(), st.y_e(), st.r()]).T[:40]
n = 2
xyz = np.array([st.x_e(None, 1, n), st.y_e(None, 1, n), st.r(None, 1, n)]).T[:40]
#print (xyz)
print (np.sqrt(np.sum((xyz[1:] - xyz[:-1]) ** 2, 1)).sum())
print (xyz[-1, 2])
print (np.sqrt(np.sum((xyz[1:] - xyz[:-1]) ** 2, 1)).sum() - xyz[-1, 2])
print (st.x_e(67.8883), st.y_e(67.8883))
#print (np.sqrt(np.sum(np.diff(xyz, 0) ** 2, 1)))
print (st.pitch(67.8883 - 0.01687))
print (st.pitch(23.2446))
#print (st.)
#print (st.)