*Heading
 Muffler model for *FREQUENCY analysis, SIM=NO
 M, KG, S
** ----------------------------------------------------------------
** 
** PART INSTANCE: MufflerShell-1
** 
*Node,nset=shell,input=muffler_shell_nodes.inp
*Element, type=S4R, input=muffler_shell_elem.inp
** ----------------------------------------------------------------
*Elset, elset=MufflerShell-1_I1, generate
 1458, 1500,   1
*Shell Section, elset=MufflerShell-1_I1, material=steel
 0.00075, 5
** ----------------------------------------------------------------
*Nset, nset=shellsym,unsorted
  3301,3376,3375,3299,3373,3297,3340,3339,3338,3337,3336,3335,3334,3333,3332,3331
  3330,3329,3328,3327,3326,3325,3324,3323,3322,3321,3320,3319,3318,3317,3316,3315
  3314,3313,3312,3311,3310,3309,3295,3307,3292,3304,3303,3291
** ----------------------------------------------------------------
*Nset, nset=shellconstraint,unsorted
  3302,3377,3378,3300,3374,3298,3341,3342,3343,3344,3345,3346,3347,3348,3349,3350
  3351,3352,3353,3354,3355,3356,3357,3358,3359,3360,3361,3362,3363,3364,3365,3366 
  3367,3368,3369,3370,3371,3372,3296,3308,3293,3305,3306,3294
** ----------------------------------------------------------------
*Nset, nset=shelldisp
 3304,3325,3375
** ----------------------------------------------------------------
** 
** MATERIALS
** 
*Material, name=steel
*Density
 7920.,
*Elastic
 1.9e+11, 0.3
** 
** BOUNDARY CONDITIONS AND CONSTRAINTS
** 
*Boundary
 shellsym,zsymm
*Equation
 2
 shellconstraint, 1, 0.176326981,  shellconstraint, 3, -1.
 2
 shellconstraint, 2, 1.,  shellsym, 2, -1.
** ----------------------------------------------------------------
** 
** STEP: Step-1
** 
*Step
 Step-1: Frequency Analysis
*Frequency,eigensolver=lanczos, SIM=NO
 10,100.,,1.
*Node file,nset=shelldisp,frequency=1
 U,PU
*End step