复杂结构声与振动主要能量传递路线识别

Identification of Sound and Vibration Critical Energy Paths for Complex Structure

从统计能量分析方法(SEA)中的功率流出发,提出了从源子系统到目标子系统各能量传递路线上子系统间功率流的平均方法来初步识别复杂系统的主要能量传递路线,并进一步提出将该方法和"功率流倒推法"相结合,即功率流综合方法,对多条主要能量传递路线进行准确的主次排序.为了说明和验证提出方法的合理性,利用AutoSEA软件对一复杂结构内部声压级及子系统间功率流进行计算,试验验证了计算结果的正确性,同时,按照所提出的功率流综合方法,对该结构的主要能量传递路线进行识别,说明了功率流综合方法是一种方便、快捷、能够准确识别复杂结构中主要能量传递路线的有效方法.

According to the power flow conception in statistical energy analysis, the method of average power flow from a source subsystem to a destination subsystem is put forward to identify preliminarily the critical energy paths for complex structure. Moreover, the method and the existing ＂power flow path--back tracking＂ method are integrated to form a power flow integration method to sort order well and truly for the critical energy paths. In order to validate the proposed method, the interior sound pressure level and power flow between subsystems are calculated by AutoSEA soft for a structure, and that the results are validated by experiments. And then the critical energy paths for the structure are ordered by the power flow integration method. It shows that the power flow integration method is a convenience, shortcut and accurate way to determine the paths.