Abstract:

According to the strength and rigidity specificaton and structural integrity program, it is necessary to verify the structural integrity of airplane structures under climatic/chemical/thermal environments. This paper presents the definition of the environmental spectrum and the basic methods of how to draw up the spectrum. The distribution of the total climate/chemical environment and the variational law with respect to time are investigated. The total environments for various climate regions and typical flying regions of aircraft are statistically analyzed, and the observed data, including atmosphere temperature, air humidity, solar-radiation, sulphur dioxide, seawater salinity and salt fog etc, are provided. All of these investigations can be used for structural integrity test under environmental spectrum and for reference of environmental research.

Key words: environmental spectrum, environmental test, structural integrity