FEM - Types of eigenvalue solvers reduction

Introduction

This chapter is to provide a closer information about change originated from the FEM solver implemented in SCIA Engineer version 24.0.

Certain eigenvalue solvers are no longer maintained, hence not recommended to be used:

Subspace iteration

Iterative (ICGC)

This change is applicable for eigenvalue solver in general, hence for modal analysis, linear stability analysis, and nonlinear stability analysis.

Warning message

Upon opening of the project where eigenvalue solver is used, this warning is shown:

The eigenvalue solver is automatically changed to Lanczos. Alternatively, Polynomial solver might be selected within the advanced analysis settings.