Test piece complex temperature field reconstruction method for aircraft component thermal test

Abstract

The invention discloses a method for reconstructing a complex temperature field of a test piece in a thermal test of an aircraft component. The method comprises the following steps of: 1, performing an actual thermal test on the test piece by using a quartz heater; 2, acquiring an actual time-varying temperature boundary of the filament; 3, establishing a test piece heating finite element model; 4, acquiring an initial surface simulation temperature field of the test piece; 5, correcting the time-varying temperature boundary of the filament model; and 6, obtaining the corrected surface simulation temperature field of the test piece. According to the method, the actual time-varying temperature boundary of the filament is obtained, the actual time-varying temperature boundary is endowed to the test piece heating finite element model, then the time-varying temperature boundary of the test piece heating finite element model is corrected, and a test piece surface simulation temperature field obtained through simulation replaces a temperature field obtained through test data interpolation; a complex temperature field on the surface of the test piece in an actual thermal test can be reconstructed more accurately, so that analysis results such as further thermal stress analysis and thermal modal analysis are more accurate.

Description

technical field [0001] The invention belongs to the technical field of temperature field reconstruction of a thermal test test piece, in particular to a complex temperature field reconstruction method of a test piece for a thermal test of an aircraft component. Background technique [0002] At present, the main methods used for the thermal test temperature response of aircraft components include contact measurement and non-contact measurement. Among them, non-contact measurement has limited use conditions under the current technical level, and thermocouples are the main method. Contact temperature measurement is still the mainstream temperature measurement method. Thermocouples are widely used in structural thermal tests due to their fast response and accurate temperature measurement. However, due to the limitations of the number of channels and the geometry of the test piece, the temperature The actual temperature measurement points are often limited. Therefore, the tempera...

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Problems solved by technology

[0002] At present, the main methods used for the temperature response of the thermal test of aircraft components include contact measurement and non-contact measurement. Among them, the use of non-contact measurement is limited at the current technical level, and thermocouples are the main methods. Contact temperature measurement is still the mainstream temperature measurement method. Thermocouples are widely used in structural thermal tests due to their advantages of fast response and accurate temperature measurement. The actual temperature measurement points are often limited, therefore, the temperature field of the test piece interpolated according to the test test data is often quite different from the complex temperature field of the test piece under the actual test state

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