specific node.</li><li><b>setDirichletBCAtPoint</b>: Sets displacement Dirichlet boundary                            conditions at a specific point.</li><li><b>setDirichletBCAtBorder</b>: Sets displacement Dirichlet boundary                             conditions along a border.</li><li><b>addLoadAtNode</b>: Adds a load at a specific node.</li><li><b>addLoadAtPoint</b>: Adds a load at a specific point.</li><li><b>addLoadAtBorder</b>: Adds a load along a specified border in a given                      direc