Node
Each instance represents one node in the system
method |
input |
returns |
description |
|---|---|---|---|
__init__(x,y) |
coordinates of the point as two floats |
constructor. Sets position and initializes displacement and force to zeros. |
|
fixDOF(idx) |
idx of the degree of freedom (dof) |
set internal flag for this dof accordingly. |
|
isFixed(idx) |
idx of the degree of freedom (dof) |
True|False |
test function returning True if dof at idx is fixed, False otherwise. |
setDisp(u,v) |
components of displacement |
overwrited the displacements for this node. |
|
getDisp() |
np.array([u,v]) |
returns displacement vector |
|
getPos() |
np.array([x,y]) |
returns initial position |
|
getDeformedPos(factor) |
np.array([x+factor*u,y+factor*v]) |
returns current position with displacement magnified by factor. Would be good to have a default factor of 1.0 if none given. |
|
addLoad(Px,Py) |
components of load |
add this load to nodal load |
|
setLoad(Px,Px) |
components of load |
replace current load by provided load |
|
getLoad() |
np.array([Px,Py]) |
returns current load |
name |
type |
description |
|---|---|---|
pos |
np.array([x,y]) |
holds x and y coordinates of the points |
index |
int |
index position of this Node() in a System().nodes list. This needs to be set by System().addNode(thisNode), so coordinate this with the System() team. |
disp |
np.array([u,v]) |
holds x and y components of nodal displacement |
fixity |
list of two True|False |
fixity[i] is True if i-th degree of freedom is fixed, False otherwise. Note: i=0|1 |
force |
np.array([Px,Py]) |
holds x and y components of the nodal load vector. |
Equations
Deformed position node 0: \({\bf x}_0 = {\bf X}_0 + (factor)*{\bf U}_0\)
Deformed position node 1: \({\bf x}_1 = {\bf X}_1 + (factor)*{\bf U}_1\)