NM3D1 \(N\)-\(M\) Interaction Elastic Section Syntax Text Only1 2 3 4 5 6section NM3D1 (1) (2) (3) (4) # (1) int, unique section tag # (2) double, EA # (3) double, EI of strong axis # (4) double, EI of weak axis # (5) double, linear density