Definition

class pynumad.objects.definition.Definition

Bases: object

Definition Class

A Definition object is designed to contain the basic defining features of a blade, which can be populated manually or by reading a blade file.

components

Dictionary of components indexed by component name.

Type:

dict[str, Component]

shearweb

List of shear webs. shearweb[i] gives an array defining the i-th shear web.

Type:

list

materials

Dictionary of material objects indexed by material name.

Type:

dict[str, Material]

stacks

Type:

ndarray

swstacks

Type:

ndarray

span_data

Distributed aerodynamic properties at the blade-definition stations. Index: span [m]. Columns: chord, degreestwist, percentthick, chordoffset, aerocenter, prebend, sweep.

Type:

pd.DataFrame

ispan_data

Distributed structural properties at the analysis (interpolated) stations. Index: ispan [m]. Columns: leband, teband, sparcapwidth_hp, sparcapwidth_lp, sparcapoffset_hp, sparcapoffset_lp.

Type:

pd.DataFrame

stations

List of Station objects.

Type:

list[Station]

te_type

Type:

list[str]

sparcapoffset

Single-array spar cap offset used by the Excel reader; the YAML reader populates ispan_data instead.

Type:

ndarray

sparcapwidth

Single-array spar cap width used by the Excel reader; the YAML reader populates ispan_data instead.

Type:

ndarray

property span: ndarray

Spanwise locations of the blade-definition stations [m].

property ispan: ndarray

Spanwise locations of the analysis (interpolated) stations [m].

property natural_offset

1 = offset by max thickness location, 0 = do not offset to max thickness

property rotorspin

Rotor Spin, 1 = CW rotation looking downwind, -1 = CCW rotation

property swtwisted

Shear Web, 0 = planar shear webs, 1 = shear webs twisted by blade twist

add_station(af: Airfoil, spanlocation: float)

Append a new station to this definition.

Parameters:

• af (Airfoil or str) – Airfoil object or path to airfoil coordinate file.

• spanlocation (float) – Spanwise location of the station [m].