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’s Guide for more details.