NASA-CR-3813
Propeller aircraft interior noise model
Year: 1984
Abstract: A computer program entitled PAIN (Propeller Aircraft Interior Noise) has been developed to permit calculation of the sound levels in the cabin of a propeller-driven airplane. The fuselage is modeled as a cylinder with a structurally integral floor, the cabin sidewall and floor being stiffened by ring frames, stringers and floor beams of arbitrary configurations. The cabin interior is covered with acoustic treatment and trim. The propeller noise consists of a series of tones at harmonics of the blade passage frequency. Input data required by the program include the mechanical and acoustical properties of the fuselage 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 are generated with a propeller noise prediction program such as the NASA Langley ANOPP program. The program PAIN permits the calculation of the space-average interior sound levels for the first ten harmonics of a propeller rotating alongside the fuselage. User instructions for PAIN are given in the report. Development of the analytical model is presented in NASA CR 3813.
Subject: ACOUSTIC PROPERTIES
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contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
date accessioned | 2017-09-04T18:49:15Z | |
date available | 2017-09-04T18:49:15Z | |
date copyright | 01/01/1984 | |
date issued | 1984 | |
identifier other | KRHOEEAAAAAAAAAA.pdf | |
identifier uri | http://yse.yabesh.ir/std/handle/yse/230632 | |
description abstract | A computer program entitled PAIN (Propeller Aircraft Interior Noise) has been developed to permit calculation of the sound levels in the cabin of a propeller-driven airplane. The fuselage is modeled as a cylinder with a structurally integral floor, the cabin sidewall and floor being stiffened by ring frames, stringers and floor beams of arbitrary configurations. The cabin interior is covered with acoustic treatment and trim. The propeller noise consists of a series of tones at harmonics of the blade passage frequency. Input data required by the program include the mechanical and acoustical properties of the fuselage 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 are generated with a propeller noise prediction program such as the NASA Langley ANOPP program. The program PAIN permits the calculation of the space-average interior sound levels for the first ten harmonics of a propeller rotating alongside the fuselage. User instructions for PAIN are given in the report. Development of the analytical model is presented in NASA CR 3813. | |
language | English | |
title | NASA-CR-3813 | num |
title | Propeller aircraft interior noise model | en |
type | standard | |
page | 169 | |
status | Active | |
tree | NASA - National Aeronautics and Space Administration (NASA):;1984 | |
contenttype | fulltext | |
subject keywords | ACOUSTIC PROPERTIES | |
subject keywords | AIRCRAFT COMPARTMENTS | |
subject keywords | AIRCRAFT NOISE | |
subject keywords | MECHANICAL PROPERTIES | |
subject keywords | MODELS | |
subject keywords | NOISE MEASUREMENT | |
subject keywords | NOISE PREDICTION (AIRCRAFT) | |
subject keywords | PROPELLERS | |
subject keywords | SOUND WAVES | |
subject keywords | USER MANUALS (COMPUTER PROGRAMS) |