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NASA-CR-172425
Propeller aircraft interior noise model - User's manual for computer program
Year: 1985
Abstract: A computer program entitled PAIN (an acronymn for Propeller Aircraft Interior Noise) has been developed to permit calculation of the sound levels in a model of a cabin of a propeller driven airplane. The model fuselage is a cylinder with a structurally integral floor. The cabin sidewall and floor are stiffened by ring frames, stringers and floor beams of arbitrary configurations. The cabin interior is covered with a trim (i.e., insulation with a lining) to increase the sidewall sound isolation and provide absorption in the cabin.
The propeller noise of concern is actually a series of tones that occur at the blade passage frequency and at integral multiples of that frequency (i.e., at its harmonics). The program permits the calculation of the space-average interior sound levels for the first ten (10) harmonics of a propeller (of any design) rotating alongside the fuselage.
The input data required by the program include the mechanical and acoustical properties of the structure and sidewall trim. Also, the precise propeller noise signature must be defined on a grid that lies in the fuselage skin. The propeller data have to example, the NASA Langley ANOPP program [1]).
The propeller noise of concern is actually a series of tones that occur at the blade passage frequency and at integral multiples of that frequency (i.e., at its harmonics). The program permits the calculation of the space-average interior sound levels for the first ten (10) harmonics of a propeller (of any design) rotating alongside the fuselage.
The input data required by the program include the mechanical and acoustical properties of the structure and sidewall trim. Also, the precise propeller noise signature must be defined on a grid that lies in the fuselage skin. The propeller data have to example, the NASA Langley ANOPP program [1]).
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:19:35Z | |
| date available | 2017-09-04T18:19:35Z | |
| date copyright | 01/01/1985 | |
| date issued | 1985 | |
| identifier other | HUHOEEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/202236 | |
| description abstract | A computer program entitled PAIN (an acronymn for Propeller Aircraft Interior Noise) has been developed to permit calculation of the sound levels in a model of a cabin of a propeller driven airplane. The model fuselage is a cylinder with a structurally integral floor. The cabin sidewall and floor are stiffened by ring frames, stringers and floor beams of arbitrary configurations. The cabin interior is covered with a trim (i.e., insulation with a lining) to increase the sidewall sound isolation and provide absorption in the cabin. The propeller noise of concern is actually a series of tones that occur at the blade passage frequency and at integral multiples of that frequency (i.e., at its harmonics). The program permits the calculation of the space-average interior sound levels for the first ten (10) harmonics of a propeller (of any design) rotating alongside the fuselage. The input data required by the program include the mechanical and acoustical properties of the structure and sidewall trim. Also, the precise propeller noise signature must be defined on a grid that lies in the fuselage skin. The propeller data have to example, the NASA Langley ANOPP program [1]). | |
| language | English | |
| title | NASA-CR-172425 | num |
| title | Propeller aircraft interior noise model - User's manual for computer program | en |
| type | standard | |
| page | 59 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1985 | |
| contenttype | fulltext |