DLA_ini.mac

! dynamic_load_analysis
! DLA.mac
!
! Moving and fixed (steady state) dynamic load analysis with sinusoid exciting force (time history analysis)
!
!
! USAGE: 
!	* define element group under name 'moving_load_path' - contains the elements where the load will be applied
!	* adjust values inside the settings part
!	* moving_load_results
!	OPTIONAL:
!	* (applies only for reduced analysis) define the node/element group under name 'moving_load_results' where results are needed (if not selected the nodes corresponding to 'moving_load_path' will be selected)
!	
!
!
! NOTES: 
!	* currently can handle only cases where the moving path runs in X direction (local coordinate system required otherwise) and loaded in Z direction
!	* in case of full transient analaysis the Rayleigh damping coefficients are calculated with the assumptions that the first two important (largest mass participation in excitation direction if mass_sort_freq=1) modes have the specified structural damping
!	* currently working only with line type load path (torsional modes..)
!	* the moving_load_path is used for mode shape extraction for BS -> later mode_line COMP
!	* -> later moving_load_area COMP 

FINISH
/CLEAR,START

!***************************************************************************************************************************
!* SETTINGS
!***************************************************************************************************************************
!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

!file_name		= 'simple_beam'
file_name		= 'Eszaki_ferdekabeles'

ksic			= 0.03			    ! structural damping -  constant modal damping for 'modal' type analaysis and Rayleigh type damping for 'full' type analayis

! Loading
loading			= 'fixed'		    ! 'fixed' (steady state) or 'moving' (pedestrian group)
movement		= 'walking'		    ! 'walking'; 'jogging' (only affects the 'moving' type analysis
code			= 'SETRA'		    ! 'no'; 'BS' - EN BS; 'SETRA' - french recommendations

load_velocity		= 1000			    ! [mm/s] (only for 'moving'; if code (BS) is selected it will be overwritten)
load_amplitude		= 1013			    ! scalar [N] for moving; scalar [N/mm] for fixed; if code (BS, SETRA) is selected it will be overwritten)
excited_freq		= 2			    ! number!, modes sorted in respect of mass participation in the direction of excitation
loaded_width		= 3.6*1000

mass_sort_freq		= 'no'			    ! sort freqs according to modal participation -> select accordingly

!BS
BS_category		= 'B'			    ! 'A'; 'B'; 'C'; 'D'

!Sétra
SETRA_category		= 3
direction		= 'V'			    ! 'V' - vertical, 'L' - longitudinal, 'T' - transverse

! Analysis type - for time history
analysis		= 'modal'		    ! 'full' - full transient (not working -  freqs for Rayleigh dampoing should be specified), 'modal' - modal superposition
load_def		= 'array'		    ! 'array' - loading as array (vector) -> constant time step
						    ! 'table' (not working) - loading as table -> automatic time step can be used (only in case of full transient)
! Analysis options
max_mode		= 30			    ! maximum number of modes calculated if modal transient analysis is selected
time_step		= 20			    ! T/time_step
time_factor		= 1.5			    ! if >1.0 increase the time to explore the decay of vibration

f1			= 0			    ! [Hz] (leave it zero if you want to let the module to select the frequencies - not always a good idea)
f2			= 0			    ! [Hz]

! Results
results			= 'reduced'		    ! 'full' - all results for every element is saved; 'reduced' - only the results for nodes of 'moving_load_path' (or 'moving_load_results' if specified) are saved
post_proc		= 'yes'			    ! 'yes'; 'no'; basic post-processing
!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


!***************************************************************************************************************************
!* RELOAD MODEL
!***************************************************************************************************************************

/COPY,%file_name%,db,,%file_name%_DLA_basic,db
PARSAV,SCALAR,temp_param,parm

RESUME,%file_name%_DLA_basic,db,,0,

PARRES,CHANGE,temp_param,parm
PARSAV,SCALAR,%file_name%_DLA_basic_param,parm

/FILNAME,%file_name%_DLA_basic,1

! create a folder to save results of dynamic load analysis
!/MKDIR,DLA

!***************************************************************************************************************************
!* ANALYSIS - CALL DLA.mac
!***************************************************************************************************************************


!1
analysis_number = 1
DLA

!2
RESUME,%file_name%_DLA_basic,db,,0,
PARRES,CHANGE,%file_name%_DLA_basic_param,parm

analysis_number = 2
ksic			= 0.05
!code			= 'SETRA'
!loading			= 'moving'
!movement		= 'walking'
DLA

!3
RESUME,%file_name%_DLA_basic,db,,0,
PARRES,CHANGE,%file_name%_DLA_basic_param,parm

analysis_number = 3
ksic			= 0.01
!loading			= 'moving'
!movement		= 'jogging'
DLA