Hello Experts,
I am trying to extract the eigenvalues of the User-Defined Element. I am getting following error when I try to extract frequencies using Lanczos method
*Frequency, eigensolver=Lanczos, acoustic coupling=off, normalization=displacement
3,,,, , ,
Please help me to resolve this error. Please find the message file in attachment.
SHIFT IS DETERMINED IN ORDER TO CLOSE GAP BETWEEN TRUST INTERVALS
NEW SHIFT 1.00000e+000
NUMBER OF NEGATIVE EIGENVALUES 11
NUMBER OF POSITIVE EIGENVALUES 197
NUMBER OF NEGATIVE EIGENVALUES NOT ASSOCIATED WITH LAGRANGE MULTIPLIERS 11
NUMBER OF NEGATIVE EIGENVALUES ASSOCIATED WITH LAGRANGE MULTIPLIERS 0
***ERROR: NUMBER OF EIGENVALUES FOUND ON THE INTERVAL EXCEEDS THE EXPECTED
NUMBER. THIS MAY HAPPEN IF A SYSTEM IS OVERCONSTRAINED. RUN A STATIC
PERTURBATION ANALYSIS TO PERFORM THE OVERCONSTRAINT CHECK. ALSO THIS
MAY HAPPEN IF A SYSTEM HAS RIGID BODY MODES AND NO SHIFT IS GIVEN