A study of the application of power-spectral methods of generalized harmonic analysis to gust loads on airplanes

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The applicability of some results from the theory of generalized harmonic analysis (or power-spectral analysis) to the analysis of gust loads on airplanes in continuous rough air is examined. The general relations for linear systems between power spectrums of a random input disturbance and an output response are used to relate the spectrum of airplane load in rough air to the spectrum of atmospheric gust velocity. The power spectrum of loads is shown to provide a measure of the load intensity in terms of the standard deviation (root mean square) of the load distribution for an airplane in flight through ... continued below

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Press, Harry & Mazelsky, Bernard January 1, 1954.

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This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and one other and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 26 times . More information about this report can be viewed below.

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  • Main Title: A study of the application of power-spectral methods of generalized harmonic analysis to gust loads on airplanes
  • Series Title: NACA Technical Reports

Description

The applicability of some results from the theory of generalized harmonic analysis (or power-spectral analysis) to the analysis of gust loads on airplanes in continuous rough air is examined. The general relations for linear systems between power spectrums of a random input disturbance and an output response are used to relate the spectrum of airplane load in rough air to the spectrum of atmospheric gust velocity. The power spectrum of loads is shown to provide a measure of the load intensity in terms of the standard deviation (root mean square) of the load distribution for an airplane in flight through continuous rough air. For the case of a load output having a normal distribution, which appears from experimental evidence to apply to homogeneous rough air, the standard deviation is shown to describe the probability distribution of loads or the proportion of total time that the load has given values. Thus, for airplane in flight through homogeneous rough air, the probability distribution of loads may be determined from a power-spectral analysis. In order to illustrate the application of power-spectral analysis to gust-load analysis and to obtain an insight into the relations between loads and airplane gust-response characteristics, two selected series of calculations are presented. The results indicate that both methods of analysis yield results that are consistent to a first approximation.

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  • Accession or Local Control No: 93R20265
  • URL: http://hdl.handle.net/2060/19930090975 External Link
  • Report No.: NACA-TR-1172
  • Center for AeroSpace Information Number: 19930090975
  • Archival Resource Key: ark:/67531/metadc65528

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

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  • January 1, 1954

Added to The UNT Digital Library

  • Nov. 17, 2011, 10:13 p.m.

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  • April 12, 2018, 5:28 p.m.

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Press, Harry & Mazelsky, Bernard. A study of the application of power-spectral methods of generalized harmonic analysis to gust loads on airplanes, report, January 1, 1954; (digital.library.unt.edu/ark:/67531/metadc65528/: accessed May 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.