*HEADING : MODEL CHANGE ACOUSTICS TESTS [AC2D3] *PREPRINT,ECHO=YES,MODEL=YES,HISTORY=YES *NODE, Nset=ODB_NSET 1 , 41,,10. 1001,1. 1041,1.,10. *NGEN,NSET=NALL 1,41 1001,1041 *ELEMENT,TYPE=AC2D3,ELSET=EALL 200, 1, 1001, 1003, 201, 1003, 3, 1, 202, 3, 1003, 1005, 203, 1005, 5, 3, 204, 5, 1005, 1007, 205, 1007, 7, 5, 206, 7, 1007, 1009, 207, 1009, 9, 7, 208, 9, 1009, 1011, 209, 1011, 11, 9, 210, 11, 1011, 1013, 211, 1013, 13, 11, 212, 13, 1013, 1015, 213, 1015, 15, 13, 214, 15, 1015, 1017, 215, 1017, 17, 15, 216, 17, 1017, 1019, 217, 1019, 19, 17, 218, 19, 1019, 1021, 219, 1021, 21, 19, 220, 21, 1021, 1023, 221, 1023, 23, 21, 222, 23, 1023, 1025, 223, 1025, 25, 23, 224, 25, 1025, 1027, 225, 1027, 27, 25, 226, 27, 1027, 1029, 227, 1029, 29, 27, 228, 29, 1029, 1031, 229, 1031, 31, 29, 230, 31, 1031, 1033, 231, 1033, 33, 31, 232, 33, 1033, 1035, 233, 1035, 35, 33, 234, 35, 1035, 1037, 235, 1037, 37, 35, 236, 37, 1037, 1039, 237, 1039, 39, 37, 238, 39, 1039, 1041, 239, 1041, 41, 39, *ELSET,ELSET=SECOND,GENERATE 220,239 *MATERIAL,NAME=AIR *DENSITY 1.293 , *ACOUSTIC MEDIUM,BULK MODULUS 1.42176E5 , *SOLID SECTION,MATERIAL=AIR,ELSET=EALL *NSET,NSET=RECRD,GEN 1,21 *NSET,NSET=DRIV 1 , ************************************** *Elset,Elset=ODB_ESET SECOND, EALL ** ** *Nset, Nset=ODB_NSET ODB_NSET, NALL, RECRD, DRIV ** ** *STEP *STEADY STATE DYNAMIC,DIRECT 1. , *IMPEDANCE 239,I1, *BOUNDARY DRIV,8,,1. *NODE PRINT,NSET=RECRD POR,PPOR *NODE FILE,NSET=RECRD POR,PPOR *OUTPUT,FIELD,VARIABLE=PRESELECT,OP=ADD,FREQUENCY=9999 *OUTPUT,FIELD, OP=ADD *NODE OUTPUT,NSET=RECRD POR, *OUTPUT,HISTORY,OP=ADD *NODE OUTPUT,NSET=RECRD POR, *ENDSTEP ************************************** *STEP *STATIC 1,1 *MODEL CHANGE,REMOVE SECOND, *ENDSTEP ************************************** *STEP *STEADY STATE DYNAMIC,DIRECT 1. , *IMPEDANCE,OP=NEW 219,I1, *BOUNDARY DRIV,8,,1. *NODE PRINT,NSET=RECRD POR,PPOR *NODE FILE,NSET=RECRD POR,PPOR *OUTPUT,FIELD, OP=ADD *NODE OUTPUT,NSET=RECRD POR, *OUTPUT,HISTORY,OP=ADD *NODE OUTPUT,NSET=RECRD POR, *ENDSTEP