Adams Basic Package > Adams View > View Command Language > panel > panel set acf_twindow eigen_solution_calculation

panel set acf_twindow eigen_solution_calculation

Specifies that you want Adams linearize the model about an operating point by performing an eigen solution analysis.
To linearize and Adams model about an operating point, the Adams model should first be placed in the configuration by performing and STATIC_SIMULATION or an TRANSIENT_SIMULATION. Then the EIGEN_SOLUTION_CALCULATION can be performed to provide the eigen value and eigen vectors associated to the linear system derived from the model at the operating point.
Specifying the DAMPING parameter as NO means that the velocity dependent terms in forces and VARIABLEs are not included in the stiffness (K) and mass (M) matrices.
Specifying the VECTORS parameter as NO means that no eigenvectors (i.e. mode shapes) will be computed. Only eigenvalues will be reported.

Format:

 
panel set acf_twindow eigen_solution_calculation
damping =
yes/no
no_eigen_vectors =
true_only
coordinates_of_modes =
integer
energy_of_modes =
integer
dissipative_energy =
integer
kinetic_energy =
integer
strain_energy =
integer

Example:

 
panel set acf_twindow eigen_solution_calculation &
damping =
yes &
no_eigen_vectors =
true

Description:

 
Parameter
Value Type
Description
Damping
Yes/No
Specifies if damping is to be included in the eigen solution analysis
no_eigen_vectors
True
Specifying the NO_EIGEN_VECTORS parameter indicates to Adams that the eigen solution analysis is to be performed without computation of mode shapes (eigenvectors). Only the eigenvalues will be reported.
coordinates_of_modes
Integer
This parameter is used to specify the mode numbers for which a table of mode shape coordinates will be output to the Adams output file.
energy_of_modes
Integer
This parameter is used to specify the mode numbers for which a table of modal energy distribution will be output to the Adams output file.
dissipative_energy
Integer
This parameter is used to specify the mode numbers for which a table of disspative energy distribution will be output to the Adams output file.
kinetic_energy
Integer
This parameter is used to specify the mode numbers for which a table of kinetic energy distribution will be output to the Adams output file.
strain_energy
Integer
This parameter is used to specify the mode numbers for which a table of strain energy distribution will be output to the Adams output file.

Extended Definition:

1. Specifying the DAMPING parameter as NO means that the velocity dependent terms in forces and VARIABLEs are not included in the stiffness (K) and mass (M) matrices.
2. The “coordinates_of_modes”, ”dissipative_energy”,”strain_energy”,”kinetic_energy” and “energy_of_modes” parameter accepts either one (1) value or two (2) values separated by a comma (,). The values are mode shape numbers, and must be greater than zero. Two values are given to specify a range of mode shape numbers. One value is given to specify a single mode shape number.