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PACABS |
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PACABS |
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PACABS |
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PACABS |
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Bulk Data Entry
PACABS – Acoustic Absorber Property Entry
Description
Defines the properties of an acoustic absorber element.
Format
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
PACABS |
PID |
SYNTH |
TID1 |
TID2 |
TID3 |
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CUTFR |
B |
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K |
M |
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Field |
Contents |
PID |
Property identification number. No default (Integer > 0) |
SYNTH |
Controls the calculation of the B, K, and M values. YES: The B, K, and M values are calculated from TIDi tables. NO: The B, K, and M values are used directly from the B, K, and M fields. Default = YES (Character = YES or NO) |
TID1 |
Identification number of a TABLEDi entry that defines the resistance. See comment 2. Default = blank (Integer > 0) |
TID2 |
Identification number of a TABLEDi entry that defines the reactance. See comment 2. Default = blank (Integer > 0) |
TID3 |
Identification number of a TABLEDi entry that defines the weighting function. See comment 2. Default = blank (Integer > 0) |
CUTFR |
Cutoff frequency for tables referenced above. (Real > 0.0) |
B |
Equivalent Damping per unit area. Default = blank (Real ≥ 0.0) |
K |
Equivalent Stiffness per unit area. Default = blank (Real ≥ 0.0) |
M |
Equivalent Mass per unit area. Default = blank (Real ≥ 0.0) |
| 1. | The PACABS Bulk Data Entry should only be referenced by a CHACAB Bulk Data Entry. |
| 2. | TID1 and TID2 should be specified (TID3 is not mandatory), if SYNTH field is set to YES. The equivalent structural model will be derived from TIDi. If TID3 is blank, then the weighting function is set to 1.0. |
| 3. | The TIDi tabular data should be defined as a function of frequency in cycles/unit time. |
| 4. | If SYNTH=NO, then B, K, or M fields will be used to derive the Equivalent Structural Model. |
See Also:
