*Heading Muffler and interior air model for sequentially coupled acoustic analysis of a muffler M, KG, S ** ---------------------------------------------------------------- ** ** 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., ** ---------------------------------------------------------------- ** ** PART INSTANCE: Interface Elements ** *Element, type=ASI8, elset=asi 10001, 3387, 4699, 4863, 3551, 8558, 8894, 8893, 6176 10002, 3551, 4863, 4862, 3550, 8893, 8892, 8891, 6175 10003, 3550, 4862, 4698, 3386, 8891, 8890, 8557, 6174 10004, 3386, 4698, 4693, 3381, 8557, 8556, 8550, 6004 10005, 3381, 4693, 4742, 3430, 8550, 8645, 8644, 6048 10006, 3430, 4742, 4741, 3429, 8644, 8643, 8642, 6047 10007, 3429, 4741, 4740, 3428, 8642, 8641, 8640, 6046 10008, 3428, 4740, 4739, 3427, 8640, 8639, 8638, 6045 10009, 3427, 4739, 4738, 3426, 8638, 8637, 8636, 6044 10010, 3426, 4738, 4737, 3425, 8636, 8635, 8634, 6043 10011, 3425, 4737, 4736, 3424, 8634, 8633, 8632, 6042 10012, 3424, 4736, 4735, 3423, 8632, 8631, 8630, 6041 10013, 3423, 4735, 4734, 3422, 8630, 8629, 8628, 6040 10014, 3422, 4734, 4733, 3421, 8628, 8627, 8626, 6039 10015, 3421, 4733, 4732, 3420, 8626, 8625, 8624, 6038 10016, 3420, 4732, 4731, 3419, 8624, 8623, 8622, 6037 10017, 3419, 4731, 4730, 3418, 8622, 8621, 8620, 6036 10018, 3418, 4730, 4729, 3417, 8620, 8619, 8618, 6035 10019, 3417, 4729, 4728, 3416, 8618, 8617, 8616, 6034 10020, 3416, 4728, 4727, 3415, 8616, 8615, 8614, 6033 10021, 3415, 4727, 4726, 3414, 8614, 8613, 8612, 6032 10022, 3414, 4726, 4725, 3413, 8612, 8611, 8610, 6031 10023, 3413, 4725, 4724, 3412, 8610, 8609, 8608, 6030 10024, 3412, 4724, 4723, 3411, 8608, 8607, 8606, 6029 10025, 3411, 4723, 4722, 3410, 8606, 8605, 8604, 6028 10026, 3410, 4722, 4721, 3409, 8604, 8603, 8602, 6027 10027, 3409, 4721, 4720, 3408, 8602, 8601, 8600, 6026 10028, 3408, 4720, 4719, 3407, 8600, 8599, 8598, 6025 10029, 3407, 4719, 4692, 3380, 8598, 8597, 8549, 6024 10030, 3380, 4692, 4696, 3384, 8549, 8553, 8554, 6003 10031, 3384, 4696, 4831, 3519, 8554, 8826, 8827, 6141 10032, 3519, 4831, 4697, 3385, 8827, 8828, 8555, 6142 ** ---------------------------------------------------------------- *Interface,elset=asi ** ---------------------------------------------------------------- *Nset,nset=asi,elset=asi ** ---------------------------------------------------------------- *Submodel, absolute=1.e-3,global elset=MufflerShell-1_I1 asi, ** ---------------------------------------------------------------- *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 ** ---------------------------------------------------------------- ** ** MATERIALS ** *Material, name=air *Acousticmedium,bulkmodulus 1.42e5, *Density 1.2, ** ---------------------------------------------------------------- ** ** STEP: Step-1 ** *Step Step-1: Frequency Response *Steady State Dynamics, direct, frequency scale=linear 179.0,181.0,12 *Boundary,submodel, step=1 asi,1,3 *Simpedance,non=circu cylinder,0.7 *Simpedance,non=spher sphere1,0.7 *Simpedance,non=spher sphere2,0.7 *Output,field,op=new,frequency=6 *Node output U,POR *Output,history,op=new,frequency=1 *Node file,nset=asi,frequency=1 POR,PPOR *End step