*HEADING Acoustic test - 1D Problem, Transient; A 4m long tube; from left to right, a sound source, 3m is air, then 1m of a highly absorbent material, followed by a rigid termination. [ACAX3] *PREPRINT,ECHO=NO,HISTORY=NO,MODEL=NO ** *********************************************************** **To test different frequencies change the value here *Parameter f=100.0 T=1.0/f omega=2*3.14159*f ******************************* ** ** Mesh Generation ** *NODE, Nset=ODB_NSET 1,0, 401,4, 1001,0, 2E-2 1401,4, 2E-2 *NGEN,NSET=ALL 1,401 1001,1401 *NSET,NSET=SAMPLE,GENERATE 1,401,10 *NSET,NSET=LOAD 1,1001 *ELEMENT,TYPE=ACAX3 1, 1, 2, 1002, 2, 1002, 1001, 1, 3, 2, 3, 1003, 4, 1003, 1002, 2, 5, 3, 4, 1004, 6, 1004, 1003, 3, 7, 4, 5, 1005, 8, 1005, 1004, 4, 9, 5, 6, 1006, 10, 1006, 1005, 5, 11, 6, 7, 1007, 12, 1007, 1006, 6, 13, 7, 8, 1008, 14, 1008, 1007, 7, 15, 8, 9, 1009, 16, 1009, 1008, 8, 17, 9, 10, 1010, 18, 1010, 1009, 9, 19, 10, 11, 1011, 20, 1011, 1010, 10, 21, 11, 12, 1012, 22, 1012, 1011, 11, 23, 12, 13, 1013, 24, 1013, 1012, 12, 25, 13, 14, 1014, 26, 1014, 1013, 13, 27, 14, 15, 1015, 28, 1015, 1014, 14, 29, 15, 16, 1016, 30, 1016, 1015, 15, 31, 16, 17, 1017, 32, 1017, 1016, 16, 33, 17, 18, 1018, 34, 1018, 1017, 17, 35, 18, 19, 1019, 36, 1019, 1018, 18, 37, 19, 20, 1020, 38, 1020, 1019, 19, 39, 20, 21, 1021, 40, 1021, 1020, 20, 41, 21, 22, 1022, 42, 1022, 1021, 21, 43, 22, 23, 1023, 44, 1023, 1022, 22, 45, 23, 24, 1024, 46, 1024, 1023, 23, 47, 24, 25, 1025, 48, 1025, 1024, 24, 49, 25, 26, 1026, 50, 1026, 1025, 25, 51, 26, 27, 1027, 52, 1027, 1026, 26, 53, 27, 28, 1028, 54, 1028, 1027, 27, 55, 28, 29, 1029, 56, 1029, 1028, 28, 57, 29, 30, 1030, 58, 1030, 1029, 29, 59, 30, 31, 1031, 60, 1031, 1030, 30, 61, 31, 32, 1032, 62, 1032, 1031, 31, 63, 32, 33, 1033, 64, 1033, 1032, 32, 65, 33, 34, 1034, 66, 1034, 1033, 33, 67, 34, 35, 1035, 68, 1035, 1034, 34, 69, 35, 36, 1036, 70, 1036, 1035, 35, 71, 36, 37, 1037, 72, 1037, 1036, 36, 73, 37, 38, 1038, 74, 1038, 1037, 37, 75, 38, 39, 1039, 76, 1039, 1038, 38, 77, 39, 40, 1040, 78, 1040, 1039, 39, 79, 40, 41, 1041, 80, 1041, 1040, 40, 81, 41, 42, 1042, 82, 1042, 1041, 41, 83, 42, 43, 1043, 84, 1043, 1042, 42, 85, 43, 44, 1044, 86, 1044, 1043, 43, 87, 44, 45, 1045, 88, 1045, 1044, 44, 89, 45, 46, 1046, 90, 1046, 1045, 45, 91, 46, 47, 1047, 92, 1047, 1046, 46, 93, 47, 48, 1048, 94, 1048, 1047, 47, 95, 48, 49, 1049, 96, 1049, 1048, 48, 97, 49, 50, 1050, 98, 1050, 1049, 49, 99, 50, 51, 1051, 100, 1051, 1050, 50, 101, 51, 52, 1052, 102, 1052, 1051, 51, 103, 52, 53, 1053, 104, 1053, 1052, 52, 105, 53, 54, 1054, 106, 1054, 1053, 53, 107, 54, 55, 1055, 108, 1055, 1054, 54, 109, 55, 56, 1056, 110, 1056, 1055, 55, 111, 56, 57, 1057, 112, 1057, 1056, 56, 113, 57, 58, 1058, 114, 1058, 1057, 57, 115, 58, 59, 1059, 116, 1059, 1058, 58, 117, 59, 60, 1060, 118, 1060, 1059, 59, 119, 60, 61, 1061, 120, 1061, 1060, 60, 121, 61, 62, 1062, 122, 1062, 1061, 61, 123, 62, 63, 1063, 124, 1063, 1062, 62, 125, 63, 64, 1064, 126, 1064, 1063, 63, 127, 64, 65, 1065, 128, 1065, 1064, 64, 129, 65, 66, 1066, 130, 1066, 1065, 65, 131, 66, 67, 1067, 132, 1067, 1066, 66, 133, 67, 68, 1068, 134, 1068, 1067, 67, 135, 68, 69, 1069, 136, 1069, 1068, 68, 137, 69, 70, 1070, 138, 1070, 1069, 69, 139, 70, 71, 1071, 140, 1071, 1070, 70, 141, 71, 72, 1072, 142, 1072, 1071, 71, 143, 72, 73, 1073, 144, 1073, 1072, 72, 145, 73, 74, 1074, 146, 1074, 1073, 73, 147, 74, 75, 1075, 148, 1075, 1074, 74, 149, 75, 76, 1076, 150, 1076, 1075, 75, 151, 76, 77, 1077, 152, 1077, 1076, 76, 153, 77, 78, 1078, 154, 1078, 1077, 77, 155, 78, 79, 1079, 156, 1079, 1078, 78, 157, 79, 80, 1080, 158, 1080, 1079, 79, 159, 80, 81, 1081, 160, 1081, 1080, 80, 161, 81, 82, 1082, 162, 1082, 1081, 81, 163, 82, 83, 1083, 164, 1083, 1082, 82, 165, 83, 84, 1084, 166, 1084, 1083, 83, 167, 84, 85, 1085, 168, 1085, 1084, 84, 169, 85, 86, 1086, 170, 1086, 1085, 85, 171, 86, 87, 1087, 172, 1087, 1086, 86, 173, 87, 88, 1088, 174, 1088, 1087, 87, 175, 88, 89, 1089, 176, 1089, 1088, 88, 177, 89, 90, 1090, 178, 1090, 1089, 89, 179, 90, 91, 1091, 180, 1091, 1090, 90, 181, 91, 92, 1092, 182, 1092, 1091, 91, 183, 92, 93, 1093, 184, 1093, 1092, 92, 185, 93, 94, 1094, 186, 1094, 1093, 93, 187, 94, 95, 1095, 188, 1095, 1094, 94, 189, 95, 96, 1096, 190, 1096, 1095, 95, 191, 96, 97, 1097, 192, 1097, 1096, 96, 193, 97, 98, 1098, 194, 1098, 1097, 97, 195, 98, 99, 1099, 196, 1099, 1098, 98, 197, 99, 100, 1100, 198, 1100, 1099, 99, 199, 100, 101, 1101, 200, 1101, 1100, 100, 201, 101, 102, 1102, 202, 1102, 1101, 101, 203, 102, 103, 1103, 204, 1103, 1102, 102, 205, 103, 104, 1104, 206, 1104, 1103, 103, 207, 104, 105, 1105, 208, 1105, 1104, 104, 209, 105, 106, 1106, 210, 1106, 1105, 105, 211, 106, 107, 1107, 212, 1107, 1106, 106, 213, 107, 108, 1108, 214, 1108, 1107, 107, 215, 108, 109, 1109, 216, 1109, 1108, 108, 217, 109, 110, 1110, 218, 1110, 1109, 109, 219, 110, 111, 1111, 220, 1111, 1110, 110, 221, 111, 112, 1112, 222, 1112, 1111, 111, 223, 112, 113, 1113, 224, 1113, 1112, 112, 225, 113, 114, 1114, 226, 1114, 1113, 113, 227, 114, 115, 1115, 228, 1115, 1114, 114, 229, 115, 116, 1116, 230, 1116, 1115, 115, 231, 116, 117, 1117, 232, 1117, 1116, 116, 233, 117, 118, 1118, 234, 1118, 1117, 117, 235, 118, 119, 1119, 236, 1119, 1118, 118, 237, 119, 120, 1120, 238, 1120, 1119, 119, 239, 120, 121, 1121, 240, 1121, 1120, 120, 241, 121, 122, 1122, 242, 1122, 1121, 121, 243, 122, 123, 1123, 244, 1123, 1122, 122, 245, 123, 124, 1124, 246, 1124, 1123, 123, 247, 124, 125, 1125, 248, 1125, 1124, 124, 249, 125, 126, 1126, 250, 1126, 1125, 125, 251, 126, 127, 1127, 252, 1127, 1126, 126, 253, 127, 128, 1128, 254, 1128, 1127, 127, 255, 128, 129, 1129, 256, 1129, 1128, 128, 257, 129, 130, 1130, 258, 1130, 1129, 129, 259, 130, 131, 1131, 260, 1131, 1130, 130, 261, 131, 132, 1132, 262, 1132, 1131, 131, 263, 132, 133, 1133, 264, 1133, 1132, 132, 265, 133, 134, 1134, 266, 1134, 1133, 133, 267, 134, 135, 1135, 268, 1135, 1134, 134, 269, 135, 136, 1136, 270, 1136, 1135, 135, 271, 136, 137, 1137, 272, 1137, 1136, 136, 273, 137, 138, 1138, 274, 1138, 1137, 137, 275, 138, 139, 1139, 276, 1139, 1138, 138, 277, 139, 140, 1140, 278, 1140, 1139, 139, 279, 140, 141, 1141, 280, 1141, 1140, 140, 281, 141, 142, 1142, 282, 1142, 1141, 141, 283, 142, 143, 1143, 284, 1143, 1142, 142, 285, 143, 144, 1144, 286, 1144, 1143, 143, 287, 144, 145, 1145, 288, 1145, 1144, 144, 289, 145, 146, 1146, 290, 1146, 1145, 145, 291, 146, 147, 1147, 292, 1147, 1146, 146, 293, 147, 148, 1148, 294, 1148, 1147, 147, 295, 148, 149, 1149, 296, 1149, 1148, 148, 297, 149, 150, 1150, 298, 1150, 1149, 149, 299, 150, 151, 1151, 300, 1151, 1150, 150, 301, 151, 152, 1152, 302, 1152, 1151, 151, 303, 152, 153, 1153, 304, 1153, 1152, 152, 305, 153, 154, 1154, 306, 1154, 1153, 153, 307, 154, 155, 1155, 308, 1155, 1154, 154, 309, 155, 156, 1156, 310, 1156, 1155, 155, 311, 156, 157, 1157, 312, 1157, 1156, 156, 313, 157, 158, 1158, 314, 1158, 1157, 157, 315, 158, 159, 1159, 316, 1159, 1158, 158, 317, 159, 160, 1160, 318, 1160, 1159, 159, 319, 160, 161, 1161, 320, 1161, 1160, 160, 321, 161, 162, 1162, 322, 1162, 1161, 161, 323, 162, 163, 1163, 324, 1163, 1162, 162, 325, 163, 164, 1164, 326, 1164, 1163, 163, 327, 164, 165, 1165, 328, 1165, 1164, 164, 329, 165, 166, 1166, 330, 1166, 1165, 165, 331, 166, 167, 1167, 332, 1167, 1166, 166, 333, 167, 168, 1168, 334, 1168, 1167, 167, 335, 168, 169, 1169, 336, 1169, 1168, 168, 337, 169, 170, 1170, 338, 1170, 1169, 169, 339, 170, 171, 1171, 340, 1171, 1170, 170, 341, 171, 172, 1172, 342, 1172, 1171, 171, 343, 172, 173, 1173, 344, 1173, 1172, 172, 345, 173, 174, 1174, 346, 1174, 1173, 173, 347, 174, 175, 1175, 348, 1175, 1174, 174, 349, 175, 176, 1176, 350, 1176, 1175, 175, 351, 176, 177, 1177, 352, 1177, 1176, 176, 353, 177, 178, 1178, 354, 1178, 1177, 177, 355, 178, 179, 1179, 356, 1179, 1178, 178, 357, 179, 180, 1180, 358, 1180, 1179, 179, 359, 180, 181, 1181, 360, 1181, 1180, 180, 361, 181, 182, 1182, 362, 1182, 1181, 181, 363, 182, 183, 1183, 364, 1183, 1182, 182, 365, 183, 184, 1184, 366, 1184, 1183, 183, 367, 184, 185, 1185, 368, 1185, 1184, 184, 369, 185, 186, 1186, 370, 1186, 1185, 185, 371, 186, 187, 1187, 372, 1187, 1186, 186, 373, 187, 188, 1188, 374, 1188, 1187, 187, 375, 188, 189, 1189, 376, 1189, 1188, 188, 377, 189, 190, 1190, 378, 1190, 1189, 189, 379, 190, 191, 1191, 380, 1191, 1190, 190, 381, 191, 192, 1192, 382, 1192, 1191, 191, 383, 192, 193, 1193, 384, 1193, 1192, 192, 385, 193, 194, 1194, 386, 1194, 1193, 193, 387, 194, 195, 1195, 388, 1195, 1194, 194, 389, 195, 196, 1196, 390, 1196, 1195, 195, 391, 196, 197, 1197, 392, 1197, 1196, 196, 393, 197, 198, 1198, 394, 1198, 1197, 197, 395, 198, 199, 1199, 396, 1199, 1198, 198, 397, 199, 200, 1200, 398, 1200, 1199, 199, 399, 200, 201, 1201, 400, 1201, 1200, 200, 401, 201, 202, 1202, 402, 1202, 1201, 201, 403, 202, 203, 1203, 404, 1203, 1202, 202, 405, 203, 204, 1204, 406, 1204, 1203, 203, 407, 204, 205, 1205, 408, 1205, 1204, 204, 409, 205, 206, 1206, 410, 1206, 1205, 205, 411, 206, 207, 1207, 412, 1207, 1206, 206, 413, 207, 208, 1208, 414, 1208, 1207, 207, 415, 208, 209, 1209, 416, 1209, 1208, 208, 417, 209, 210, 1210, 418, 1210, 1209, 209, 419, 210, 211, 1211, 420, 1211, 1210, 210, 421, 211, 212, 1212, 422, 1212, 1211, 211, 423, 212, 213, 1213, 424, 1213, 1212, 212, 425, 213, 214, 1214, 426, 1214, 1213, 213, 427, 214, 215, 1215, 428, 1215, 1214, 214, 429, 215, 216, 1216, 430, 1216, 1215, 215, 431, 216, 217, 1217, 432, 1217, 1216, 216, 433, 217, 218, 1218, 434, 1218, 1217, 217, 435, 218, 219, 1219, 436, 1219, 1218, 218, 437, 219, 220, 1220, 438, 1220, 1219, 219, 439, 220, 221, 1221, 440, 1221, 1220, 220, 441, 221, 222, 1222, 442, 1222, 1221, 221, 443, 222, 223, 1223, 444, 1223, 1222, 222, 445, 223, 224, 1224, 446, 1224, 1223, 223, 447, 224, 225, 1225, 448, 1225, 1224, 224, 449, 225, 226, 1226, 450, 1226, 1225, 225, 451, 226, 227, 1227, 452, 1227, 1226, 226, 453, 227, 228, 1228, 454, 1228, 1227, 227, 455, 228, 229, 1229, 456, 1229, 1228, 228, 457, 229, 230, 1230, 458, 1230, 1229, 229, 459, 230, 231, 1231, 460, 1231, 1230, 230, 461, 231, 232, 1232, 462, 1232, 1231, 231, 463, 232, 233, 1233, 464, 1233, 1232, 232, 465, 233, 234, 1234, 466, 1234, 1233, 233, 467, 234, 235, 1235, 468, 1235, 1234, 234, 469, 235, 236, 1236, 470, 1236, 1235, 235, 471, 236, 237, 1237, 472, 1237, 1236, 236, 473, 237, 238, 1238, 474, 1238, 1237, 237, 475, 238, 239, 1239, 476, 1239, 1238, 238, 477, 239, 240, 1240, 478, 1240, 1239, 239, 479, 240, 241, 1241, 480, 1241, 1240, 240, 481, 241, 242, 1242, 482, 1242, 1241, 241, 483, 242, 243, 1243, 484, 1243, 1242, 242, 485, 243, 244, 1244, 486, 1244, 1243, 243, 487, 244, 245, 1245, 488, 1245, 1244, 244, 489, 245, 246, 1246, 490, 1246, 1245, 245, 491, 246, 247, 1247, 492, 1247, 1246, 246, 493, 247, 248, 1248, 494, 1248, 1247, 247, 495, 248, 249, 1249, 496, 1249, 1248, 248, 497, 249, 250, 1250, 498, 1250, 1249, 249, 499, 250, 251, 1251, 500, 1251, 1250, 250, 501, 251, 252, 1252, 502, 1252, 1251, 251, 503, 252, 253, 1253, 504, 1253, 1252, 252, 505, 253, 254, 1254, 506, 1254, 1253, 253, 507, 254, 255, 1255, 508, 1255, 1254, 254, 509, 255, 256, 1256, 510, 1256, 1255, 255, 511, 256, 257, 1257, 512, 1257, 1256, 256, 513, 257, 258, 1258, 514, 1258, 1257, 257, 515, 258, 259, 1259, 516, 1259, 1258, 258, 517, 259, 260, 1260, 518, 1260, 1259, 259, 519, 260, 261, 1261, 520, 1261, 1260, 260, 521, 261, 262, 1262, 522, 1262, 1261, 261, 523, 262, 263, 1263, 524, 1263, 1262, 262, 525, 263, 264, 1264, 526, 1264, 1263, 263, 527, 264, 265, 1265, 528, 1265, 1264, 264, 529, 265, 266, 1266, 530, 1266, 1265, 265, 531, 266, 267, 1267, 532, 1267, 1266, 266, 533, 267, 268, 1268, 534, 1268, 1267, 267, 535, 268, 269, 1269, 536, 1269, 1268, 268, 537, 269, 270, 1270, 538, 1270, 1269, 269, 539, 270, 271, 1271, 540, 1271, 1270, 270, 541, 271, 272, 1272, 542, 1272, 1271, 271, 543, 272, 273, 1273, 544, 1273, 1272, 272, 545, 273, 274, 1274, 546, 1274, 1273, 273, 547, 274, 275, 1275, 548, 1275, 1274, 274, 549, 275, 276, 1276, 550, 1276, 1275, 275, 551, 276, 277, 1277, 552, 1277, 1276, 276, 553, 277, 278, 1278, 554, 1278, 1277, 277, 555, 278, 279, 1279, 556, 1279, 1278, 278, 557, 279, 280, 1280, 558, 1280, 1279, 279, 559, 280, 281, 1281, 560, 1281, 1280, 280, 561, 281, 282, 1282, 562, 1282, 1281, 281, 563, 282, 283, 1283, 564, 1283, 1282, 282, 565, 283, 284, 1284, 566, 1284, 1283, 283, 567, 284, 285, 1285, 568, 1285, 1284, 284, 569, 285, 286, 1286, 570, 1286, 1285, 285, 571, 286, 287, 1287, 572, 1287, 1286, 286, 573, 287, 288, 1288, 574, 1288, 1287, 287, 575, 288, 289, 1289, 576, 1289, 1288, 288, 577, 289, 290, 1290, 578, 1290, 1289, 289, 579, 290, 291, 1291, 580, 1291, 1290, 290, 581, 291, 292, 1292, 582, 1292, 1291, 291, 583, 292, 293, 1293, 584, 1293, 1292, 292, 585, 293, 294, 1294, 586, 1294, 1293, 293, 587, 294, 295, 1295, 588, 1295, 1294, 294, 589, 295, 296, 1296, 590, 1296, 1295, 295, 591, 296, 297, 1297, 592, 1297, 1296, 296, 593, 297, 298, 1298, 594, 1298, 1297, 297, 595, 298, 299, 1299, 596, 1299, 1298, 298, 597, 299, 300, 1300, 598, 1300, 1299, 299, 599, 300, 301, 1301, 600, 1301, 1300, 300, 601, 301, 302, 1302, 602, 1302, 1301, 301, 603, 302, 303, 1303, 604, 1303, 1302, 302, 605, 303, 304, 1304, 606, 1304, 1303, 303, 607, 304, 305, 1305, 608, 1305, 1304, 304, 609, 305, 306, 1306, 610, 1306, 1305, 305, 611, 306, 307, 1307, 612, 1307, 1306, 306, 613, 307, 308, 1308, 614, 1308, 1307, 307, 615, 308, 309, 1309, 616, 1309, 1308, 308, 617, 309, 310, 1310, 618, 1310, 1309, 309, 619, 310, 311, 1311, 620, 1311, 1310, 310, 621, 311, 312, 1312, 622, 1312, 1311, 311, 623, 312, 313, 1313, 624, 1313, 1312, 312, 625, 313, 314, 1314, 626, 1314, 1313, 313, 627, 314, 315, 1315, 628, 1315, 1314, 314, 629, 315, 316, 1316, 630, 1316, 1315, 315, 631, 316, 317, 1317, 632, 1317, 1316, 316, 633, 317, 318, 1318, 634, 1318, 1317, 317, 635, 318, 319, 1319, 636, 1319, 1318, 318, 637, 319, 320, 1320, 638, 1320, 1319, 319, 639, 320, 321, 1321, 640, 1321, 1320, 320, 641, 321, 322, 1322, 642, 1322, 1321, 321, 643, 322, 323, 1323, 644, 1323, 1322, 322, 645, 323, 324, 1324, 646, 1324, 1323, 323, 647, 324, 325, 1325, 648, 1325, 1324, 324, 649, 325, 326, 1326, 650, 1326, 1325, 325, 651, 326, 327, 1327, 652, 1327, 1326, 326, 653, 327, 328, 1328, 654, 1328, 1327, 327, 655, 328, 329, 1329, 656, 1329, 1328, 328, 657, 329, 330, 1330, 658, 1330, 1329, 329, 659, 330, 331, 1331, 660, 1331, 1330, 330, 661, 331, 332, 1332, 662, 1332, 1331, 331, 663, 332, 333, 1333, 664, 1333, 1332, 332, 665, 333, 334, 1334, 666, 1334, 1333, 333, 667, 334, 335, 1335, 668, 1335, 1334, 334, 669, 335, 336, 1336, 670, 1336, 1335, 335, 671, 336, 337, 1337, 672, 1337, 1336, 336, 673, 337, 338, 1338, 674, 1338, 1337, 337, 675, 338, 339, 1339, 676, 1339, 1338, 338, 677, 339, 340, 1340, 678, 1340, 1339, 339, 679, 340, 341, 1341, 680, 1341, 1340, 340, 681, 341, 342, 1342, 682, 1342, 1341, 341, 683, 342, 343, 1343, 684, 1343, 1342, 342, 685, 343, 344, 1344, 686, 1344, 1343, 343, 687, 344, 345, 1345, 688, 1345, 1344, 344, 689, 345, 346, 1346, 690, 1346, 1345, 345, 691, 346, 347, 1347, 692, 1347, 1346, 346, 693, 347, 348, 1348, 694, 1348, 1347, 347, 695, 348, 349, 1349, 696, 1349, 1348, 348, 697, 349, 350, 1350, 698, 1350, 1349, 349, 699, 350, 351, 1351, 700, 1351, 1350, 350, 701, 351, 352, 1352, 702, 1352, 1351, 351, 703, 352, 353, 1353, 704, 1353, 1352, 352, 705, 353, 354, 1354, 706, 1354, 1353, 353, 707, 354, 355, 1355, 708, 1355, 1354, 354, 709, 355, 356, 1356, 710, 1356, 1355, 355, 711, 356, 357, 1357, 712, 1357, 1356, 356, 713, 357, 358, 1358, 714, 1358, 1357, 357, 715, 358, 359, 1359, 716, 1359, 1358, 358, 717, 359, 360, 1360, 718, 1360, 1359, 359, 719, 360, 361, 1361, 720, 1361, 1360, 360, 721, 361, 362, 1362, 722, 1362, 1361, 361, 723, 362, 363, 1363, 724, 1363, 1362, 362, 725, 363, 364, 1364, 726, 1364, 1363, 363, 727, 364, 365, 1365, 728, 1365, 1364, 364, 729, 365, 366, 1366, 730, 1366, 1365, 365, 731, 366, 367, 1367, 732, 1367, 1366, 366, 733, 367, 368, 1368, 734, 1368, 1367, 367, 735, 368, 369, 1369, 736, 1369, 1368, 368, 737, 369, 370, 1370, 738, 1370, 1369, 369, 739, 370, 371, 1371, 740, 1371, 1370, 370, 741, 371, 372, 1372, 742, 1372, 1371, 371, 743, 372, 373, 1373, 744, 1373, 1372, 372, 745, 373, 374, 1374, 746, 1374, 1373, 373, 747, 374, 375, 1375, 748, 1375, 1374, 374, 749, 375, 376, 1376, 750, 1376, 1375, 375, 751, 376, 377, 1377, 752, 1377, 1376, 376, 753, 377, 378, 1378, 754, 1378, 1377, 377, 755, 378, 379, 1379, 756, 1379, 1378, 378, 757, 379, 380, 1380, 758, 1380, 1379, 379, 759, 380, 381, 1381, 760, 1381, 1380, 380, 761, 381, 382, 1382, 762, 1382, 1381, 381, 763, 382, 383, 1383, 764, 1383, 1382, 382, 765, 383, 384, 1384, 766, 1384, 1383, 383, 767, 384, 385, 1385, 768, 1385, 1384, 384, 769, 385, 386, 1386, 770, 1386, 1385, 385, 771, 386, 387, 1387, 772, 1387, 1386, 386, 773, 387, 388, 1388, 774, 1388, 1387, 387, 775, 388, 389, 1389, 776, 1389, 1388, 388, 777, 389, 390, 1390, 778, 1390, 1389, 389, 779, 390, 391, 1391, 780, 1391, 1390, 390, 781, 391, 392, 1392, 782, 1392, 1391, 391, 783, 392, 393, 1393, 784, 1393, 1392, 392, 785, 393, 394, 1394, 786, 1394, 1393, 393, 787, 394, 395, 1395, 788, 1395, 1394, 394, 789, 395, 396, 1396, 790, 1396, 1395, 395, 791, 396, 397, 1397, 792, 1397, 1396, 396, 793, 397, 398, 1398, 794, 1398, 1397, 397, 795, 398, 399, 1399, 796, 1399, 1398, 398, 797, 399, 400, 1400, 798, 1400, 1399, 399, 799, 400, 401, 1401, 800, 1401, 1400, 400, *ELSET,ELSET=CHANNEL,generate 1,600 *ELset,ELSET=ABSORB,generate 601,800 ** *NSET, NSET=INTERFACE 1301,1300,300,601, 301,302,1302, *NSET, NSET=ODB_NSET ODB_NSET, INTERFACE *NSET, NSET=QA_TEST ODB_NSET ** ************************************************ ** ** ELEMENT PROPERTIES ** ** *SOLID SECTION,MATERIAL=AIR,ELSET=CHANNEL *SOLID SECTION,MATERIAL=ABSORB,ELSET=ABSORB ** ** *MATERIAL,NAME=AIR *DENSITY 1.21, *ACOUSTIC MEDIUM,BULK MODULUS 0.1424E6, ** ** *MATERIAL,NAME=ABSORB *DENSITY 1.21, *ACOUSTIC MEDIUM,BULK MODULUS 0.1424E6, *ACOUSTIC MEDIUM,VOLUMETRIC DRAG 1e4, ** ** *AMPLITUDE,NAME=SINE,DEF=PERIODIC 1,,0.0,0.0 -1.0,0,0,0 *STEP *DYNAMIC,EXPLICIT , ** ** Prescribe outward acceleration of 1e-2 at node LOAD. *CLOAD,AMP=SINE LOAD,8,-1 ** *OUTPUT,FIELD,NUM=1 *NODE OUTPUT POR, *NODE OUTPUT,NSET=QA_TEST POR, ***OUTPUT,HISTORY,FREQ=10 ***NODE OUTPUT,NSET=ODB_NSET ** POR, *ENDSTEP