NUMERICAL METHOD FOR OBTAINING COUPLING LOSS FACTOR

摘要

Disclosed is a numerical method for obtaining a coupling loss factor, the method comprising the following steps: (1) dividing a system into continuously coupled sub-systems; (2) calculating modes of each sub-system; (3) calculating coupling parameters between the modes in a neighboring sub-system; (4) calculating, on the basis of a modal energy method, the distribution of a load input power and the distribution of a modal vibration energy of a mode in a frequency domain; (5) calculating and analyzing in a frequency band the total input power of the loads of each sub-system and the total vibration energy of each sub-system; (6) calculating, on the basis of a power input method, a coupling loss factor. The method for obtaining a coupling loss factor is derived from statistical energy theory. The numerical method obtains a coupling loss factor on the basis of the modal energy method and the power input method, combining the modal energy method with the power input method to enable consideration of the impact of power transmissions between non-resonant modes. Thus, the method accurately calculates coupling loss factors between sub-systems in the statistical energy method.