David Weed
Ansys Employee

Hello Li,

This message is indicating that the commands used in calculating the fracture parameters (e.g., SIF/Jint) are not sent to the modal solver. The reason being is that fracture parameter calculation for a modal solve is not supported. The Mechanical User's Guide explains here that fracture parameters are not calculated for a modal/msup-transient analysis: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/wb_sim/ds_solve_cracks.html

You may still include the crack in your modal analysis if you wish, but note that with a semi-elliptical crack, there is no contact between the upper and lower crack face surfaces, so interpenetration may occur. You may wish to use a bonded contact pair in this case.