Hello,
While I am trying a 1dof example to test the eigenfrequency analysis by LMS and MBD, I feel really confused that I have one model passed but with another failed which have all the parameters same but only the direction of applied force on the rigid domain. I attached my idea and the two models which I setup in Comsol5.3a windows. Does anyone have ever suffered this? Thanks a lot in advance.
Erro info: - Feature: Eigenvalue Solver 1 (sol1/e1) Singular matrix. - Detail: There are 1 degrees of freedom that do not occur in any equation (empty columns in matrix) for the variable comp1.mbd.rd1.u. at coordinates: (0,0,0), ...