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I tested a simply supported beam and added a node in the beam. There was only one element before the node was added. I then added a point load at the new node. See my codes below. When a new node is inserted, the original element will be deleted. Two new elements will be defined accordingly. However, the original code still references the original key in the self.system.element_map[1]. But Key 1 has been deleted. A key error will occur. You can test my model here: --------------------------------- from anastruct import SystemElements structure = SystemElements(EA=15000, EI=5000, mesh=101) # define elements structure.add_element(location=[[0,0],[10,0]]) # define support structure.add_support_hinged(node_id=1) structure.add_support_hinged(node_id=2) structure.insert_node(element_id=1, factor=0.4) # define loads structure.q_load(q=-5, element_id=[2,3],direction='element') structure.point_load(node_id=3, Fx=5, Fy=0) # structure.validate() structure.show_structure() # solve the numerical problem structure.solve() structure.show_bending_moment() structure.show_axial_force()
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I tested a simply supported beam and added a node in the beam. There was only one element before the node was added. I then added a point load at the new node. See my codes below. When a new node is inserted, the original element will be deleted. Two new elements will be defined accordingly. However, the original code still references the original key in the self.system.element_map[1]. But Key 1 has been deleted. A key error will occur. You can test my model here: