Settings of the System of Linear Algebraic Equation Solver in Frequency Analysis

Settings of the system of linear algebraic equation solver (systems of linear algebraic equations)by frequency analysis is performed from the Command Bar by selecting (Mode - Calculation Settings, Calculation Settings - Frequency Analysis, Frequency Analysis - Eigen Solver).

Fig. 1 - Command panel, solver settings for frequency analysis

In the Solution method drop-down list, select the solution method problems of eigenvalues. The following methods are available:

Krylova-Shura;
Arnoldi;
Lancosha;
Davidson;
Jacobi-Davidson.

By default, the method is selected automatically.

Since the finding of eigenvalues is carried out by iterations, specify the maximum number of them, relative and absolute accuracy (you can leave the default values).

At each iteration , the solution of a system of linear algebraic equations; therefore, it is necessary to choose the appropriate solver: direct or iterative (you can "trust" the program to do automatic selection). In the case of choosing an iterative system of linear algebraic equation solver on The command bar opens additional input elements:

Fig. 2 - Command panel, iterative solver settings

In the drop-down lists Solver and Preconditioner choose the iteration method and the system of linear algebraic equation preconditioning method, respectively. Then in the input windows of the group Parameters of the iterative solver set the required values or leave the default values.

Click Apply.

Click Start Calculation.