pyHarm.Elements.NodeToNodeElements.DLFTElements.DLFTElement¶

Classes¶

DLFTElement

This element is modification of the ABCElement in order to take into account the required modifications needed when using DLFT elements.

Module Contents¶

class pyHarm.Elements.NodeToNodeElements.DLFTElements.DLFTElement.DLFTElement(nh: int | list[int], nti: int, name: str, data: dict, CS: pyHarm.CoordinateSystem.CoordinateSystem, dynop: dict[str, numpy.ndarray] | None = None)¶

Bases: pyHarm.Elements.NodeToNodeElements.NodeToNodeElement.NodeToNodeElement

This element is modification of the ABCElement in order to take into account the required modifications needed when using DLFT elements.

flag_nonlinear¶

if True, the element is nonlinear.

Type:: bool

flag_AFT¶

if True, the element requires an alternating frequency/time domain procedure for computing residuals.

Type:: bool

flag_DLFT¶

if True, the element uses the dynamic Lagrangian method for computing the residuals.

Type:: bool

factory_keyword: str = 'DLFTElement'¶

keyword that is used to call the creation of this class in the system factory.

Type:: str

__flag_update__()¶

adim()¶

Modifies the element properties according to the characteristic length and angular frequency.

Parameters:

lc (float) – characteristic length value.
wc (float) – characteristic angular frequency value.

_evalJaco_DF(xg, om, Rglin, dJgdxlin, dJgdomlin, step)¶

Computes the jacobian using finite difference method for DLFT Elements.

Parameters:

xg (np.ndarray) – full displacement vector.
om (float) – angular frequency value.
Rglin (float) – Residual of all the linear contributions.
dJgdxlin (float) – Jacobian with respect to displacement of all the linear contributions.
dJgdomlin (float) – Jacobian with respect to angular frequency of all the linear contributions.
step (float) – step size for the finite difference method.

Returns:

jacobian with respect to displacement vector. dJdom (np.ndarray): jacobian with respect to angular frequency.

Return type:

dJdx (np.ndarray)