Frequency domain implementation for the FEDEM Dynamics Solver. More...

Data Types
type	freqresponsemodule::dloadmotion
	Data type for frequency-domain load/motions. More...

Modules
module	freqresponsemodule
	Module with subroutines for frequency domain analysis.

Functions/Subroutines
subroutine, public	freqresponsemodule::solvefreqdomain (ierr)
	Interface to the frequency-domain solver module in Fedem. More...

subroutine, public	freqresponsemodule::deallocatefreq ()
	Deallocates the dynamic structures of the frequency domain analysis. More...

subroutine	freqresponsemodule::read_input (mech)
	Reads input specifications for the frequency domain analysis. More...

subroutine	freqresponsemodule::freq_eigenvalues (ndim, IOC, IOF, ierr)
	Calculates the eigenvalues and eigenvectors (optional). More...

subroutine	freqresponsemodule::freq_sweep (ndim, ierr)
	Runs a sweep analysis for detecting the eigenfrequencies (optional). More...

subroutine	writetofile (filename, abscissa, ordinate)
	Writes data records to the file filename. More...

subroutine	freqresponsemodule::freq_input (forces, npt, inc, start, IOC, ierr)
	Load and motion definition for the frequency domain analysis. More...

subroutine	freqresponsemodule::freqincandupdate (sam, sys, mech, dis, vel, acc, ierr)
	Updates mechanism based on displacement, velocity and acceleration. More...

subroutine	freqresponsemodule::freq_segment (data, sUd, sUv, sUa, mDmp, del, npt, sdim, ierr)
	Handles the data segments including modal or direct solution. More...

subroutine	remove_rowcol_matrix (A, i, sCol)
	Removes a column and corresponding row in a quadratic matrix. More...

subroutine	add_row_vec (value, A, i)
	Extends the 1D array A by inserting a value at position i. More...

subroutine	remove_row_vec (A, i)
	Reduces the 1D array A by deleting the i'th element. More...

subroutine	freqresponsemodule::freq_seg_analysis (sam, sys, mech, t, IOC, IOF, ierr)
	Main driver for the segmented frequency response analysis. More...

subroutine	freqresponsemodule::complexeqsolv (n, A, B, ierr)
	Solving a complex system of linear equations. More...

subroutine	freqresponsemodule::fft_complex_1d (n, data, del, transform, viewing, ierr)
	Fourier transformation for a single periodic sequence within a complex array. More...

subroutine	freqresponsemodule::createpyplot (abscissa, ordinate, atitle, alabel, afilename, axlabel, savefigure, istat)
	Creates output file for curve plotting in python. More...

subroutine	freqresponsemodule::createpyplotcurves (abscissa, ordinate, atitle, alabel, afilename, axlabel, type, savefigure)
	Creates output file for curve plotting in python. More...

Variables
type(dloadmotion), dimension(:), pointer, save	freqresponsemodule::plm => null()
	All frequency-domain loads and motions. More...

integer, save	freqresponsemodule::nrmodes
	number of modes used in the calculation More...

integer, save	freqresponsemodule::windowsize
	describes the window size in samples More...

integer, save	freqresponsemodule::sweep_dof
	sweep analysis (sweep location for acting force) More...

real(dp), dimension(2), save	freqresponsemodule::sweep_range
	sweep range (start and end frequency) More...

real(dp), save	freqresponsemodule::fs
	sampling frequency More...

integer, dimension(20), save	freqresponsemodule::output_triad_dof
	postprocessing, contains triad id and local dof number More...

integer, dimension(10), save	freqresponsemodule::out_dof
	internal equation number (based on output_triad_dof) More...

type(pyplot), pointer, save	freqresponsemodule::plt => null()
	python plot handler More...

integer, save	freqresponsemodule::ccw = 0
	total number of windows More...

integer, save	freqresponsemodule::seg_start = 0
	segstart (total position) More...

Detailed Description

Frequency domain implementation for the FEDEM Dynamics Solver.

Subroutines of this file are related to frequency domain analysis.

Author: Guenter Glanzer, SAP SE

Date: Feb 2019

Function/Subroutine Documentation

◆ add_row_vec()

subroutine freq_segment::add_row_vec	(	complex(dp), intent(in)	value,
		complex(dp), dimension(:), intent(inout), allocatable	A,
		integer, intent(in)	i
	)

private

Extends the 1D array A by inserting a value at position i.

◆ remove_row_vec()

subroutine freq_segment::remove_row_vec	(	complex(dp), dimension(:), intent(inout), allocatable	A,
		integer, intent(in)	i
	)

private

Reduces the 1D array A by deleting the i'th element.

◆ remove_rowcol_matrix()

subroutine freq_segment::remove_rowcol_matrix	(	real(dp), dimension(:,:), intent(inout), allocatable	A,
		integer, intent(in)	i,
		real(dp), dimension(:), intent(inout)	sCol
	)

Removes a column and corresponding row in a quadratic matrix.

◆ writetofile()

subroutine freq_sweep::writetofile	(	character(len=*), intent(in)	filename,
		real(dp), intent(in)	abscissa,
		complex(dp), intent(in)	ordinate
	)

Writes data records to the file filename.

Data Types

Modules