*BUCKLE

Number of eigenvalues to be estimated.

Maximum eigenvalue of interest. Abaqus/Standard will also report all eigenvalues that converge in the same iteration, even if their values are greater than the maximum eigenvalue specified by the user.

Number of vectors used in the iteration. Abaqus/Standard usually determines this number, but you can change the number using this entry. In general, the convergence in solving the eigenproblem is more rapid if more vectors are carried in the iteration; therefore, use this data field if past experience suggests that the convergence is slow for a particular type of buckling problem. If the number of eigenvalues requested is n, the default number of vectors used is the minimum of (2n, n+8).

Maximum number of iterations. The default is 30.

Number of eigenvalues to be estimated. If the evaluation of all the eigenvalues in the given range is desired, enter the maximum number of expected eigenmodes.

Minimum eigenvalue of interest. Providing this value directs the Lanczos solution procedure to find eigenvalues near this value with minimal computational effort. Lower eigenvalues might also be found with no additional computational cost. If this field is left blank, no minimum is set.

Maximum eigenvalue of interest. Providing this value directs the Lanczos solution procedure to find eigenvalues near this value with minimal computational effort. Higher eigenvalues might also be found with no additional computational cost. If this field is left blank, no maximum is set.

Block size. If this entry is omitted, a default value, which is usually appropriate, is created.

Maximum number of block Lanczos steps within each Lanczos run. If this entry is omitted, a default value, which is usually appropriate, is created.