Buckling analysis parameters

Use this dialog to define buckling analysis parameters for a load case.

Access

1. Click Analysis Analysis Types.
2. Select an existing case, and then click Change analysis type.
3. Select Buckling, and then click OK.

Dialog elements

Case

The name of the load case.

Number of modes

The number of required buckling modes.

Tolerance

The value of tolerance that must be achieved during the iterative analysis of a structure. The default value is 0.0001.

Number of iterations

The maximum number of iterations.

If this number is exceeded and the required tolerance has not been achieved, the calculations of the structure are stopped. The default value is 40.

Subspace iteration / Block subspace iteration

The available methods for solving the eigenproblem.

Parameters

Opens the Definition of shifts dialog which allows you to define shifts for the Block subspace iteration method.

Determine positive critical coefficients only

Excludes the non-physical buckling shapes during the buckling analysis of the structure.

Sturm check

Restarts the iterative calculations if the algorithm finds skipped vibration modes in the structure.

See also:

Description of the block subspace iteration

Selection of the result type (dynamic/buckling cases)