PARAM, AMLSMAXR
Bulk Data Entry Used to determine singularities in the stiffness matrix for AMLS eigenvalue solver.
Parameter | Values | Description |
---|---|---|
AMLSMAXR | <Real> Default = 1.0e-8 |
PARAM,
AMLSMAXR is used to determine singularities
in the stiffness matrix. If the value of AMLSMAXR is exceeded in the process of factoring a stiffness matrix, this indicates a singularity in K. If the mass of this degree-of-freedom is zero, there is a "massless mechanism"; an SPC is applied and a message is written to the .out file. If there is mass, then this is a mechanism which is treated as a rigid body mode and a message is written to the .out file. Refer to AMLS (Automatic Multi-level Sub-structuring) Eigensolver in the User Guide for more details. |