NodeBoundaryCondition

class planestress.pre.boundary_condition.NodeBoundaryCondition(point: tuple[float, float], direction: str, value: float)

Bases: BoundaryCondition

Abstract base class for a boundary condition at a node.

Variables:

mesh_tag – Tagged node object.

Methods

apply_bc	Applies the boundary condition.
get_node_dofs	Get the degrees of freedom of the node.

__init__(point: tuple[float, float], direction: str, value: float) → None

Inits the NodeBoundaryCondition class.

Parameters:

• point (tuple[float, float]) – Point tuple (x, y) describing the node location.

• direction (str) – Direction of the boundary condition, "x" or "y".

• value (float) – Value of the boundary condition.

get_node_dofs() → list[int]

Get the degrees of freedom of the node.

Returns:

List (length 2) of degrees of freedom.

Return type:

list[int]

apply_bc(k: ndarray[Any, dtype[float64]], f: ndarray[Any, dtype[float64]]) → tuple[ndarray[Any, dtype[float64]], ndarray[Any, dtype[float64]]]

Applies the boundary condition.

Parameters:

• k (ndarray[Any, dtype[float64]]) – Stiffness matrix.

• f (ndarray[Any, dtype[float64]]) – Load vector.

Raises:

NotImplementedError – If this method has not been implemented.

Return type:

tuple[ndarray[Any, dtype[float64]], ndarray[Any, dtype[float64]]]