*HEADING
 FULLY COUPLED ACOUSTIC ANALYSIS OF A MUFFLER
 M, KG, S
** -------------------------------------------
** 
** PART INSTANCE: INTERIORAIR-1
** 
*NODE, INPUT=muffler_intair_nodes.inp
*ELEMENT, TYPE=AC3D10,
INPUT=muffler_intair_elem.inp
** -------------------------------------------
*ELSET, ELSET=INTERIORAIR-1_I1, GENERATE
  549,  1457,     1
*SOLID SECTION, ELSET=INTERIORAIR-1_I1,
MATERIAL=AIRABSORB
 1.,
** -------------------------------------------
*ELSET, ELSET=INTERIORAIR-1_I2, GENERATE
   1,  548,    1
*SOLID SECTION, ELSET=INTERIORAIR-1_I2,
MATERIAL=AIR
 1.,
** -------------------------------------------
** 
** PART INSTANCE: MUFFLERSHELL-1
** 
*NODE,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
** -------------------------------------------
** 
** PART INSTANCE: OUTERAIR-1
** 
*NODE,INPUT=muffler_extair_nodes.inp
*ELEMENT, TYPE=AC3D20,
INPUT=muffler_extair_elem.inp
** -------------------------------------------
*ELSET, ELSET=OUTERAIR-1_I1, GENERATE
 1501,  2734,     1
*SOLID SECTION, ELSET=OUTERAIR-1_I1,
MATERIAL=AIR
 1.,
** -------------------------------------------
*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
** -------------------------------------------
*NSET, NSET=CENTERLINE
  10,  11, 118, 119, 120, 121, 122, 123, 124, 125,
 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 
 136, 137, 138, 139, 140, 141, 142, 143, 144, 145,
 146, 147, 148, 149, 150, 151, 152, 153, 154, 155,
 156, 157, 158, 159, 160, 161, 162, 163, 164, 165,
 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
 176, 831, 832, 833, 834, 835, 836, 837, 838, 839,
 840, 841, 842, 843, 844, 845, 846, 847, 848, 849,
 850, 851, 852, 853, 854, 855, 856, 857, 858, 859,
 860, 861, 862, 863, 864, 865, 866, 867, 868, 869,
 870, 871, 872, 873, 874, 875, 876, 877, 878, 879,
 880, 881, 882, 883, 884, 885, 886, 887, 888, 889,
 890
** -------------------------------------------
*NSET, NSET=INLETPRESSURE
  11,  12,  13, 177, 186, 618, 891, 892, 893, 913,
 914, 915
** -------------------------------------------
*ELSET, ELSET=INNERAIROUTLET_S4
 288, 299, 367
*SURFACE, NAME=INNERAIROUTLET
INNERAIROUTLET_S4, S4
** -------------------------------------------
*ELSET, ELSET=INNERAIR2SHELL_S1
  367,  374,  384,  385,  386,  387,  388,  392,
  393,  894,  895,  896, 1192, 1195, 1196, 1197,
 1198, 1201, 1202, 1203, 1210, 1213, 1214, 1216,
 1237, 1238, 1239, 1240, 1243, 1248, 1250, 1330,
 1331, 1334, 1337, 1341, 1359
*ELSET, ELSET=INNERAIR2SHELL_S4
  370,  373,  375,  380,  383,  391,  559,  634,
  894,  895, 1193, 1194, 1200, 1204, 1206, 1208,
 1211, 1212, 1215, 1217, 1235, 1242, 1244, 1246,
 1247, 1249, 1251, 1276, 1298, 1320, 1321, 1322,
 1323, 1326, 1329, 1335, 1336, 1338, 1340, 1343,
 1347, 1349
*ELSET, ELSET=INNERAIR2SHELL_S2
  379,  592,  635,  858,  917, 1199, 1205, 1209,
 1236, 1241, 1252, 1253, 1254, 1325, 1339, 1344,
 1345, 1346, 1348, 1350, 1351, 1352, 1353, 1354,
 1355, 1356, 1357, 1358, 1360, 1361, 1362
*ELSET, ELSET=INNERAIR2SHELL_S3
  377,  378,  389,  390,  557,  560,  561,  568,
  683,  888,  897, 1207, 1245, 1277, 1324, 1327,
 1328, 1332, 1333, 1342, 1387, 1388
*SURFACE, NAME=INNERAIR2SHELL
INNERAIR2SHELL_S1, S1
INNERAIR2SHELL_S4, S4
INNERAIR2SHELL_S2, S2
INNERAIR2SHELL_S3, S3
** -------------------------------------------
*ELSET, ELSET=SHELL2INNERAIR_SNEG, GENERATE
1458, 1500,   1
*SURFACE, NAME=SHELL2INNERAIR
SHELL2INNERAIR_SNEG, SNEG
*ELSET, ELSET=SHELL2OUTERAIR_SPOS, GENERATE
1458, 1500,   1
*SURFACE, NAME=SHELL2OUTERAIR
SHELL2OUTERAIR_SPOS, SPOS
** -------------------------------------------
*ELSET, ELSET=OUTERAIR2SHELL_S6
2100,2116,2420
*ELSET, ELSET=OUTERAIR2SHELL_S3
2100,2420,2421,2422
*ELSET, ELSET=OUTERAIR2SHELL_S4, GENERATE
1519, 1975,   19
*SURFACE, NAME=OUTERAIR2SHELL
OUTERAIR2SHELL_S6, S6
OUTERAIR2SHELL_S3, S3
OUTERAIR2SHELL_S4, S4
** -------------------------------------------
*ELSET, ELSET=SPHERE1_S3, GENERATE
2340, 2355,    1
*ELSET, ELSET=SPHERE1_S4, GENERATE
2664,  2734,     5
*SURFACE, NAME=SPHERE1
SPHERE1_S3, S3
SPHERE1_S4, S4
** -------------------------------------------
*ELSET, ELSET=SPHERE2_S3, GENERATE
2036, 2051,    1
*ELSET, ELSET=SPHERE2_S4, GENERATE
1979, 2035,    4
*SURFACE, NAME=SPHERE2
SPHERE2_S3, S3
SPHERE2_S4, S4
** -------------------------------------------
*ELSET, ELSET=CYLINDER_S6, GENERATE
1501, 1957,   19
*SURFACE, NAME=CYLINDER
CYLINDER_S6, S6
** -------------------------------------------
*ELSET, ELSET=INNERAIRABSORB_S3
 382, 394, 403, 404, 405, 408, 411, 415, 417, 418,
 419, 423, 429, 430, 431, 437, 438, 439, 448, 451,
 452, 456, 457, 458, 459, 461, 462, 463, 464, 467,
 468, 473, 477, 478, 482, 483, 484, 498, 499, 502,
 503, 505, 506, 507
*ELSET, ELSET=INNERAIRABSORB_S2
 407, 428, 436, 443, 471, 476, 504
*ELSET, ELSET=INNERAIRABSORB_S1
 402, 410, 414, 416, 422, 426, 434, 435, 440, 441,
 444, 450, 453, 455, 460, 466, 472, 475, 479, 481,
 485, 486, 487, 488, 490, 491, 492, 495, 496, 497,
 500
*ELSET, ELSET=INNERAIRABSORB_S4
 427, 432, 433, 442, 445, 446, 447, 449, 454, 465,
 469, 470, 474, 480, 489, 493, 494, 501
*SURFACE, NAME=INNERAIRABSORB
INNERAIRABSORB_S3, S3
INNERAIRABSORB_S2, S2
INNERAIRABSORB_S4, S4
INNERAIRABSORB_S1, S1
** -------------------------------------------
** 
** MATERIALS
** 
*MATERIAL, NAME=AIR
*ACOUSTICMEDIUM,BULKMODULUS
 1.42E5,
*DENSITY
 1.2,
*MATERIAL, NAME=AIRABSORB
*ACOUSTICMEDIUM,BULKMODULUS
 1.42E5,
*ACOUSTICMEDIUM,VOLUMETRICDRAG
 1.2,
*DENSITY
 1.2,
*MATERIAL, NAME=STEEL
*DENSITY
 7920.,
*ELASTIC
 1.9E+11, 0.3
** -------------------------------------------
*TIE,NAME=ACOST1
 INNERAIR2SHELL, SHELL2INNERAIR
 OUTERAIR2SHELL, SHELL2OUTERAIR
** 
** 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 RESPONSE
*STEADY STATE DYNAMICS, DIRECT,
FREQUENCY SCALE=LINEAR
 179.0,181.0,12
*BOUNDARY
 INLETPRESSURE,8,8,1.0
*Simpedance,non=circ
 cylinder,0.7
*Simpedance,non=spher
 sphere1,0.7
*Simpedance,non=spher
 sphere2,0.7
*SIMPEDANCE,non=plan
 INNERAIROUTLET,
*OUTPUT,FIELD,OP=NEW,FREQUENCY=6
*NODE OUTPUT
 U,POR
*OUTPUT,HISTORY,OP=NEW,FREQUENCY=1
*NODE OUTPUT,NSET=CENTERLINE
 POR,
*NODE OUTPUT,NSET=SHELLDISP
 U,
*NODE FILE,NSET=CENTERLINE,FREQUENCY=1
 COORD,POR,PPOR
*NODE FILE,NSET=SHELLDISP,FREQUENCY=1
 U,PU
*END STEP