2. MODELING

CHAPTER 2 "MODELLING" 94 5.2 Hub This command is used to insert a mathematical node (node of the mathematical model). Selecting the command displays the following dialog box: where you specify the node elements. More specifically, you define : Enter the serial number " A/N " and the " Coordinates ", or let the program fill them in automatically. In this case, select "OK" and use the mouse to point to the start and end nodes on the screen in either 2D or 3D. ❖ " Degrees of Freedom ": define the degrees of freedom that the node will have. There are four options regarding the status of the corresponding movement or turn of the node: "Freedom", "Packing", "Dependency", "Spring". - " Freedom ": allows the hub to move and turn freely in the corresponding direction - " Packing ": binds movements and turns - " Dependency " means that the specific movement or turn of the node depends on the corresponding node, whose number you specify in the "Node" column, which is automatically activated when you select "Dependency".