Manual for WANDS 2.1 Wavenumber Domain Software for Solids ...

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Chapter 3 Output files 3.1 Types of output files There are several different types of output files written by WANDS. The output files are grouped as follows, • Topology file. • Matrix files. • Solution files. The topology file gives information about the node numbering and degrees of freedom in the finite element subsystems. Output for boundary element subsystems have not yet been implemented. These outputs are however less important since they are easily found from the input file. The matrix files gives the matrices for the different submodels. When considering a ”double loop” solution, the boundary element matrices are only written for the first frequency and wavenumber, since this information otherwise would give very many files. There are two solution files written for the ”double loop” solution. The first is the solutions specified at different frequencies, wavenumbers and degrees of freedom in 73
the model. The second is the radiated power and radiation efficiency for the different boundary element submodels. 3.2 Topology file The topology file is written in order see how global and local degrees of freedom are related. This is especially important for solid finite elements, where the global node numbering is difficult to find directly from the input file. On the other hand, the fluid boundary topology is directly given from the input. Hence, fluid boundary element topology is not given in the topology file. The topology file is therefore called FE_topology.out. The output data in the topology output file is, just like the input file, ordered in a number of blocks. Each block begins with the line: *OUTFEM: possibly followed by an information line beginning with, **, e.g. *OUTFEM: SOLID: NODECOORD: **nodenumber,y-coordinate, z-coordinate is starting a block that gives data for the nodal coordinates of the solid sub–model. The actual data follows below these two first lines. The line starting with ** is only there for information and is usually not referred to in the following of this chapter. In the following of this Chapter, the different blocks are listed in the order they appear. Note however that blocks that does not contain any data are not written. Also at the end of the Chapter there is a Figure summarizing the different blocks. 3.2.1 OUTFEM: SOLID: If there is a solid sub–model present, the data for this model is written first in the ’FE_topology.out’ file. 74
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Manual for WANDS 2.1 Wavenumber Dom
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UNIVERSITY OF SOUTHAMPTON INSTITUTE
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Contents 1 Introduction 5 1.1 Theor
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3.2.4 BEAM: PLATE: NODECOORD: . . .
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Chapter 1 Introduction Warnings! It
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• Coupling between plate finite e
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Chapter 2 Input file WANDS is writt
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*INSYS: SOLTYPE: ** double loop, be
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*INSYS: MODELS: BE-FLUID: block. Th
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means that there is a submodel ”S
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2.2 INFEM: The input data for diffe
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3 2 Element type 2 1 5 4 3 Element
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*INFEM: SOLID: MAT: ISO: S2 Entry n
Page 28 and 29: 7, 5, 1, 0, 0 ,restrains the local
Page 30 and 31: INFEM: SOLID: FORCE: To define a fo
Page 32 and 33: 2.2.2 INFEM: PLATE: The indata bloc
Page 34 and 35: Example: *INFEM: PLATE: MAT: ISO: E
Page 36 and 37: *INFEM: PLATE: RESTR: 1 = restraine
Page 38 and 39: 12, 1, 3, 1.22, 0.66 12, 2, 4, 1.0,
Page 40 and 41: 2.2.3 INFEM: FLUID: For a fluid sub
Page 42 and 43: . . . Note! Each line must have the
Page 44 and 45: 2.3 INBEM: 2.3.1 INBEM: SOLID: INBE
Page 46 and 47: INBEM: SOLID: EDGE: To suppress ref
Page 48 and 49: Note! It can sometimes be useful to
Page 50 and 51: In each row: • The first entry gi
Page 52 and 53: 0, 0 Type 1:st digit 2:nd digit Int
Page 54 and 55: INBEM: FLUID: NODES: This specifies
Page 56 and 57: *INBEM: FLUID: BC: F2 5, 0, 0, 1, 0
Page 58 and 59: The current block specifies for whi
Page 60 and 61: • FE-Plate model and BE-Fluid mod
Page 62 and 63: writes the lagrange multipliers for
Page 64 and 65: Entry number Entry name 1 Plate ele
Page 66 and 67: Consider figure 2.4. The lines with
Page 68 and 69: *INCOUP: FE-SOLID: FE-FLUID: S1F1 1
Page 70 and 71: X 6 5 7 Z 3 2 4 8 (2.3, 4.6) 2 Y Fi
Page 72 and 73: If some numbers are complex the ord
Page 74 and 75: Submodel S1 Submodel S2 3 2 1 Figur
Page 76 and 77: where t a 3 is the traction vector
Page 80 and 81: SOLID: SIZE: This, first block, has
Page 82 and 83: Example: *OUTFEM: SOLID: ELETOP: S1
Page 84 and 85: Entry number Entry name 1 Number of
Page 86 and 87: 0.15 0.1 0.05 0 −0.05 −0.05 0 0
Page 88 and 89: *OUTFEM: BEAM: PLATE: NODECOORD: P2
Page 90 and 91: Entry number Entry name *OUTFEM: CO
Page 92 and 93: Note! This data block is basically
Page 94 and 95: OUTFEM: SOLID: PLATE: BEAM: COUPLIN
Page 96 and 97: The matrices written as outputs are
Page 98 and 99: 3.3.4 Other matrix files Currently
Page 100 and 101: Entry Description 1 Frequency 2 Wav
Page 102 and 103: 1 2 3 1 4 2 3 1 2 3 4 1 2 3 4 1 2 3
Page 104 and 105: COUPLING PLATE SOLID P1S1 P1 S1 1,
Page 106 and 107: 1, 2, 4 2, 1, 1 *INFEM: PLATE: END:
Page 108 and 109: ** Topology 2 noded elements 1, 2 2
Page 110 and 111: 4, 3 3, 2 2, 1 *INBEM: FLUID: END:
Page 112 and 113: 4.3 System matrix ⎡ ⎢ ⎣ HF1
Page 114 and 115: 12 11 -543.7638734913397562178994E-
Page 116 and 117: 0 10 20 30 40 50 H1 G1 C1p C1s I2p
Page 118 and 119: 4, 0.020, 0.030 *OUTFEM: SOLID: ELE
Page 120 and 121: 2 22.4371736726148144767695E-09 11.
Page 122 and 123: 2 -5.8181333191448287529076E-06 9.2
Page 124 and 125: Chapter 5 Some tutorial examples 5.
Page 126 and 127: 5.3.3 Examine the system matrix Whe
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which imports all matrices with one
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A mode plotting routine that reads
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point mobility magnitude [dB] −70
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point mobility magnitude [dB] −70
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M1ur=read_mat_new(’c:\WANDSoutput
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5.6 External fluid 5.6.1 Improving
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1 -3.2561925953759210741745E-03 107
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than the wavenumber for freely prop
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Index air, 37 beam plate connected,
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output, 74 solid-plate coupling, 84
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