pyyeti.nastran.n2p.rbmove

pyyeti.nastran.n2p.rbmove(rb, oldref, newref)[source]

Returns rigid-body modes relative to new reference point.

Parameters:

  • rb (6 column ndarray) – Original rigid-body modes; assumed to be n x 6.

  • oldref (3 element array) – Original [x, y, z] reference location in basic coordinates.

  • newref (3 element array) – New [x, y, z] reference location in basic coordinates.

Returns:

rbnew (6 column ndarray) – New rigid-body modes from: rb * rbgeom(oldref, newref).

Examples

>>> import numpy as np
>>> from pyyeti import nastran
>>> grids = np.array([[0., 0., 0.], [30., 10., 20.]])
>>> rb0 = nastran.rbgeom(grids)
>>> rb1 = nastran.rbgeom(grids, [2., 4., -5.])
>>> rb1_b = nastran.rbmove(rb0, [0., 0., 0.], [2., 4., -5.])
>>> np.all(rb1_b == rb1)
True