** search for "change" to see what might need to be changed for different analysis ** see also tr_readme.inp for more instructions **------------------------------------------------------------ ** ** MATERIAL PROPERTIES ** *parameter conelEngMount = 5.e3 condampEngMount = 2.e1 conelEngMountMomHor = 1.e5 conelEngMountMom = 5.e6 condampEngMountMom = 1.e3 conelPrevWheel = 1.e5 conelPrevAarms = 1.e1 conelPrevSteer = 1.e4 conelPrevShaft = 1.e4 conelPrevDoor = 1.e1 conelPrevHood = 1.e1 conelPrevLeaf = 1.e1 condampstrut = 6.9349999 ** original: condampstrut = 6.9349999 ** ** small_mass = 1.e-6 small_rota = 1.e-6 ** yield1 = 2.7000e+004 yield2 = 3.5000e+004 yield3 = 4.5000e+004 yield4 = 1.3800e+004 yield5 = 1.0000e+004 ** neigenmodes = 6 grav_acceler = 9810.0 ** **--------------------------------------------------------------- ** ** RECOVERY ** ** recov_yes_no = 'yes' - if recovery is to be performed ** = 'no' - if recovery in not to be done recov_yes_no = 'no' freq_recov = 20 ** **---------------------------------------------------------------- ** ** GRAVITY LOAD STEP ** step_type_grav = 'STATIC' load_style_grav = 'ramp' load_style = 'ramp' ** total_time_grav = 1.0 nr_inc_grav = 1.0 time_inc_grav = total_time_grav/nr_inc_grav ** **----------------------------------------------------------------- ** ** SUSPENSION COMPONENTS ** ** change parameters for different car models ** ** change lrealPropFlag, strut_init_f_left, and strut_init_f_right if trying to assess initial stress ** (see tr_readme.inp for instructions) ** lrealPropFlag = 1.0 rigidizeFactor = 1.0 + (1.0 - lrealPropFlag)*1.e3 ** ** front strut_const = 124.0 strut_init_f_left = -8756. strut_init_f_right = -8756. strut_init_l_left = 341.506 strut_init_l_right = 341.506 strut_const_stops = 2500.0 strut_upper_stop = -200 strut_lower_stop = 5.0 ** conelasstrut = strut_const *rigidizeFactor conrefleft = strut_init_l_left - lrealPropFlag*strut_init_f_left/conelasstrut conrefright = strut_init_l_right - lrealPropFlag*strut_init_f_right/conelasstrut strut_upper_stop_range = strut_upper_stop - 1000.0 strut_upper_stop_range_force = (strut_upper_stop_range - strut_upper_stop)*strut_const_stops strut_lower_stop_range = strut_lower_stop + 1000.0 strut_lower_stop_range_force = (strut_lower_stop_range - strut_lower_stop)*strut_const_stops ** ** back young_mod_real = 2.10000e5 shear_mod_real = 80769.2308 youngModulus = young_mod_real *rigidizeFactor shearModulus = shear_mod_real *rigidizeFactor ** **----------------------------------------------------------------- ** ** TIRE MODEL ** ** change next 10 parameters for different wheel models wheel_radius = 365.0 tire_rad_stiff = 600.0 lat_force_include = 0 self_align_include = 0 ** FrontInitWheelSpindleZ = 361.1831 RearInitWheelSpindleZ = 362.4570 ** ** change these four parameters if trying to asses initial stress - ** (see tr_readme.inp for instructions) ** tire_front_lt_force_init = 4962. tire_front_rt_force_init = 4962. tire_rear_lt_force_init = 3242. tire_rear_rt_force_init = 3242. ** tire_front_lt_ref_rad = tire_front_lt_force_init/tire_rad_stiff + FrontInitWheelSpindleZ tire_front_rt_ref_rad = tire_front_rt_force_init/tire_rad_stiff + FrontInitWheelSpindleZ tire_rear_lt_ref_rad = tire_rear_lt_force_init/tire_rad_stiff + RearInitWheelSpindleZ tire_rear_rt_ref_rad = tire_rear_rt_force_init/tire_rad_stiff + RearInitWheelSpindleZ ** **------------------------------------------------------------------- ** ** TIME BEFORE BUMP or STEERING ** (acceleration step + few increments in actual step) ** time_inc_cruise = distance_per_increment_at_cruise/cruise_velocity time_const_vel_bb_free_step = nr_inc_const_vel_bb_free_step*time_inc_cruise time_inc_cruise_max = 2.0*time_inc_cruise time_inc_cruise_min = 0.1*time_inc_cruise **time_inc_cruise_min = 0.01*time_inc_cruise **time_inc_cruise_max = time_inc_cruise ** velocity_increase = cruise_velocity - init_vel time_accel = velocity_increase/average_accel_during_accel time_inc_accel = time_accel/nr_inc_accel time_const_vel_bb_accel_step = nr_inc_const_vel_bb_accel_step*time_inc_accel **------------------------------------------------------------------- ** ** BUMP PARAMETERS and WHEEL POSITIONS ** ** change the following 5 parameters for different car/bump models ** change also inside the uel.f x_cg = 2329.458 centerfront = 1310.802 centerback = 2053.9387 ** bump_length = 5000.0 bump_height = 200.0 ** ** x_front = x_cg+centerfront x_back = x_cg-centerback ** a0 = init_vel a1 = cruise_velocity ta = time_accel dist_to_achieve_cruise = a0*ta+(a1-a0)*(2.5*ta - 3.0*ta + ta) ** time_const_vel_before_bump = time_const_vel_bb_accel_step + time_const_vel_bb_free_step front_bump_distance = dist_to_achieve_cruise + time_const_vel_before_bump*cruise_velocity x_bump_start = x_front + front_bump_distance dist_between_wheels = x_front - x_back **------------------------------------------------------------------- ** ** TOTAL TIME OF THE ANALYSIS ** **steering to the right ** rack_velocity_steer_right = 4.0 rack_steer_right_max = 2.0 time_completely_steered = 5.0 time_steer_right = rack_steer_right_max / rack_velocity_steer_right total_time_steer_right = time_const_vel_bb_free_step + time_steer_right + time_completely_steered ** **sinusoidal steering ** steering_frequency = 1.0 time_sinusoidal_steering = 3.0*(1.0/steering_frequency) omega = 2*3.14159265358979*steering_frequency total_time_steer_sinus = time_const_vel_bb_free_step + time_sinusoidal_steering ** **total time steering ** lsteer_right = lsteer_type lsteer_sinus = 1 - lsteer_right total_time_steering = total_time_steer_right*lsteer_right + total_time_steer_sinus*lsteer_sinus ** **total time of analysis if no steering (not the acceleration step) ** total_time_accel_step = time_accel + time_const_vel_bb_accel_step time_over_bump = (bump_length + dist_between_wheels)/cruise_velocity time_after_bump = length_after_bump/cruise_velocity total_time_free_step = time_const_vel_bb_free_step + time_over_bump + time_after_bump ** lsteering = lanalysis_type lbumps = 1 - lanalysis_type total_analysis_time = lsteering*total_time_steering + lbumps*total_time_free_step total_analysis_time = total_analysis_time*qa_length **------------------------------------------------------------------- ** ** TOTAL SPIN OF THE WHEELS ** omega_wheel = cruise_velocity/wheel_radius total_spin = omega_wheel*total_analysis_time **------------------------------------------------------------------- ** ** BETA DAMPING FOR ACOUSTIC ANALYSES (1% critical damping at 80 Hz) ** beta_damp = 4.e-5 **------------------------------------------------------------------- ** ** # of frequencies and sampling point FOR ACOUSTIC ANALYSES ** nfreq = 10 nfreq_minus = 9 npts = 5 nmode = 5 nmode_minus = 4 **-------------------------------------------------------------------