Chap3 Stiffness method¶

Stiffness matrix of spring system¶

Two nodes: i, j; Nodal displacement: \(u_i\), \(u_j\); Nodal forces: \(f_i\), \(f_j\); Spring constant(stiffness): k

Direct stiffness method¶

Applying the fixed displacements¶

Properties of global stiffness matrix¶

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