def add_load_case(self, lc, factor):
"""
Add a load case to the load combination.
:param lc: (:class:`anastruct.fem.util.LoadCase`)
:param factor: (flt) Multiply all the loads in this LoadCase with this factor.
"""
lc, factor = args_to_lists(lc, factor)
for i in range(len(lc)):
self.spec[lc[i].name] = [lc[i], factor[i]]
def moment_load(self, node_id, Ty):
"""
Apply a moment on a node.
:param node_id: (int/ list) Nodes ID.
:param Ty: (flt/ list) Moments acting on the node.
"""
node_id, Ty = args_to_lists(node_id, Ty)
for i in range(len(node_id)):
id_ = _negative_index_to_id(node_id[i], self.node_map.keys())
self.loads_moment[id_] = Ty[i]
def q_load(self, q, element_id, direction="element"):
"""
Apply a q-load to an element.
:param element_id: (int/ list) representing the element ID
:param q: (flt) value of the q-load
:param direction: (str) "element", "x", "y"
"""
q, element_id, direction = args_to_lists(q, element_id, direction)
for i in range(len(element_id)):
id_ = _negative_index_to_id(element_id[i], self.element_map.keys())
self.plotter.max_q = max(self.plotter.max_q, abs(q[i]))
self.loads_q[id_] = q[i] * self.orientation_cs * self.load_factor
el = self.element_map[id_]
el.q_load = q[i] * self.orientation_cs * self.load_factor
el.q_direction = direction[i]
def point_load(self, node_id, Fx=0, Fy=0, rotation=0):
"""
Apply a point load to a node.
:param node_id: (int/ list) Nodes ID.
:param Fx: (flt/ list) Force in global x direction.
:param Fy: (flt/ list) Force in global x direction.
:param rotation: (flt/ list) Rotate the force clockwise. Rotation is in degrees.
"""
node_id, Fx, Fy, rotation = args_to_lists(node_id, Fx, Fy, rotation)
for i in range(len(node_id)):
id_ = _negative_index_to_id(node_id[i], self.node_map.keys())
self.plotter.max_system_point_load = max(self.plotter.max_system_point_load,
(Fx[i] ** 2 + Fy[i] ** 2) ** 0.5)
cos = math.cos(math.radians(rotation[i]))
sin = math.sin(math.radians(rotation[i]))
self.loads_point[id_] = (Fx[i] * cos + Fy[i] * sin, Fy[i] * self.orientation_cs * cos + Fx[i] * sin)