BillOfMaterials#

class pynumad.objects.bom.BillOfMaterials#

Bases: object

Bill of Materials class.

Contains per-layer material information for each component region of the blade (HP shell, LP shell, and each shear web), stored as pandas.DataFrame objects.

hp#

HP-side shell layers. Columns: layernum, materialid, name, beginsta, endsta, maxwidth, avgwidth, area, thickness, weight, angle, sta_begin_idx, sta_end_idx, seg_start, seg_end.

Type:

pd.DataFrame

lp#

LP-side shell layers (same columns as hp).

Type:

pd.DataFrame

sw#

Shear-web layers. Same columns as hp plus web_id (int).

Type:

pd.DataFrame

mold#

Dict of DataFrames with mold/prefab dimensional data (populated by generate_segmented). Keys: ‘shell’, ‘spar’, ‘LEreinf’, ‘TEreinf’, ‘root’, ‘web’.

Type:

dict

lebond#

Total leading-edge bond length [mm].

Type:

float

tebond#

Total trailing-edge bond length [mm].

Type:

float

swbonds#

Per-web bond-line length arrays [mm].

Type:

list[ndarray]

dryweight#

Total dry material weight [kg].

Type:

float

generate(ispan, components, materials, keypoints: KeyPoints)#

Generate the Bill-of-Materials.

Parameters:

  • ispan (ndarray) – Interpolated span station locations [m].

  • components (dict) – Component definitions (from Definition.components).

  • materials (dict) – Material definitions (from Definition.materials).

  • keypoints (KeyPoints)

Returns:

self

generate_segmented(segments, ispan, components, materials, keypoints)#

Generate a segmented Bill-of-Materials.

Parameters:

  • segments (list of dict) –

    Each entry describes one blade segment with keys:

    ’span_nd’ : [start, end] normalized spanwise extents ‘hp_extents’ : [key1, key2] HP chordwise bounds (e.g. [‘le’,’te’]) ‘lp_extents’ : [key1, key2] LP chordwise bounds

  • ispan (np.ndarray) – Interpolated spanwise stations (m)

  • components (dict) – Component name -> Component objects

  • materials (dict) – Material id -> Material objects

  • keypoints (KeyPoints) – Computed keypoints (must already have key_bonds)

pynumad.objects.bom.find_layer_extents(layer_dist, layer_n)#

Find the begin and end station indices where a layer count reaches layer_n.

Parameters:

  • layer_dist (array-like) – Per-station layer count distribution.

  • layer_n (scalar) – Layer threshold to find extents for.

Returns:

  • begin_station (list[int])

  • end_station (list[int])

class pynumad.objects.bom.BillOfMaterialsEntry#

Bases: object

A simple class to organize the attributes of a Bill of Materials

layernum#

Layer

Type:

int

materialid#

Material ID

Type:

int

name#

Component or region name

Type:

str

beginsta#

Begin station (m)

Type:

float

endsta#

End station (m)

Type:

float

maxwidth#

Max width (m)

Type:

float

avgwidth#

Average width (m)

Type:

float

area#

3D area (m^2)

Type:

float

thickness#

Layer thickness (mm)

Type:

float

weight#

Computed dry layer weight (g)

Type:

float