一种基于缩减统计能量分析方程的混合法研究

When analyzing a complex system using the classical statistical energy analysis method, there will have a large number of subsystems and lots of parameters, the analysis procedure will be very complex. The equation of the reduced statistical energy analysis is similar to that of the classical one. Because only the key systems are retained in the reduced statistical energy analysis and the number of subsystems is reduced, the analysis procedure can be simple. This paper further researched on the reduced statistical energy analysis equation and found that the values of the coupling loss factor, loss factor are based on the original ones with increased values made by the additional items. The additional items are in relation with the reduced subsystem and its connection properties, the values can be measured by experiments. Basing on that, a hybrid method based on the reduced statistical energy analysis equation was proposed. The principle of this method is measuring the values of the additional items firstly, and then set up the hybrid equation using the additional items and analytical parameters. This equation can be used to forecast the noise and vibration characteristics caused by changes of parameter of the retained subsystem. Numerical simulations were performed to verify its accuracy.