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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (23): 228493-228493.doi: 10.7527/S1000-6893.2023.28493

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles    

Equivalent calculation method of irradiance distribution of spectrum simulator array

Xinxin LI, Binwen WANG(), Xiaoxiao ZHANG, Linhua CONG, Jingtao WU   

  1. National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research Institute of China,Xi’an 710065,China
  • Received:2023-01-09 Revised:2023-05-02 Accepted:2023-06-19 Online:2023-07-11 Published:2023-07-07
  • Contact: Binwen WANG E-mail:17403875@623.avic
  • Supported by:
    Civil Aircraft Special Scientific Research Technology Research(MJZ3-2N21-3)

Abstract:

The Monte-Carlo method is used to calculate irradiance distribution of spectral simulator array, the calculation time is too long. The fast calculation method of irradiance for spectral simulator array is obtained based on the analytical method. Firstly, Temperature distribution model of equivalent surface light source is established for a single spectral simulator. Linear equations about temperature for each discrete point of surface light source are established by radiation heat transfer laws. Temperature of equivalent surface light source is obtained. Radiation heat model is simplified of spectrum simulator with complex reflection screen. The surface light source and the irradiated surface are discretized into light source point and receiving point. The irradiance at each received point is calculated of irradiance surface. Secondly, the irradiance distribution is calculated of spectral simulator array rotating around xy and z axes at different angles by using the equivalent surface light source. The criterion for irradiation range is proposed when equivalent surface light source intersects irradiance surface. Lastly, the calculated results of irradiance are compared with test results, the error is less than 4%. It confirmed the feasibility of equivalent surface light source instead of spectral simulator in calculating the irradiance.

Key words: spectrum simulator array, equivalent surface light source, irradiance distribution, rotation angle, irradiation range

CLC Number: