Nodes and Elements

The geometry of a structure is defined by the position of its nodes and how they are connected by elements.  The nodes and elements in a frame can be accessed via the Nodes and Elements collections of the Frame object.  These collections contain Node and Element objects representing each node and element within the structure.  The Node object contains the data that describes a joint in the frame.  This includes its position, orientation, label and whether it is pinned or rigid.  The node object also provides methods to return lists of objects associated with the node.  For example, the Springs method returns a list of all springs attached to a node.

 

The Element object provides access to data describing an individual element in a frame such as its label, section, orientation, rigid end offsets and the nodes used to define its ends.  Other read only properties provide other information about the element such as its length, slope, and the coordinates of its ends.  The Element object also provides functions that return lists of objects associated with an element such as all loads applied to the element.

 

Methods are also provided with both the Node and Element objects to transform values from their local coordinate system to the global coordinate system and vice versa.