Hi there

assuming I have chosen force type Incremental load, how is the value of incremental load determined? And how should I calculate value of displacement if displacement method is selected?

how is the base nominal shear calculated?

in example ch2-12 (eigenvalue analysis example) there is a vertical incremental load acting on nodes 02 and 03, what is incremental gravity load? shoud i define any loads for eigenvalue analysis? (while eigenvalue analysis is a free vibration per se)