舱室噪声传递路径分析的SEA赋权图法

SEA weighted digraph method for energy transfer path analysis of cabin noise

针对传统传递路径分析求解中高频问题的不足,采用SEA赋权图法分析舱室噪声的传递路径.以统计能量分析(SEA)为基础,将SEA系统与图论中路径网络进行类比得到SEA赋权图,从功率流平衡方程中提取SEA参数表示赋权图连接边的权重系数.将噪声传递路径问题转化为求解赋权图的最大权重路径问题,传递权重最大的K条路径(KDP)即为能量的主要传递路径.选取某舱室模型为分析对象,从SEA赋权图中得到2000条KDP,并通过识别路径的结点得到能量传递路径中的关键结点.各种噪声控制方案的对比结果验证了SEA赋权图法在减振降噪分析中的有效性,为降噪措施具体实施方案提供了明确的参考.

Aiming at the insufficiency of conventional transfer path analysis in solving the vibro-acoustic problems in midhigh frequency domain,the transfer path of cabin noise was analyzed by using statistical energy analysis（ SEA） weighted digraph method. Based on SEA,a SEA weighted digraph was obtained by comparing the SEA system with the path nets in graph theory,the SEA parameters were derived from the SEA power flow balance equation to represent the weight parameters of SEA weighted digraph connect side. The problem of noise transfer path was simplified to solve the maximum weighted paths problem in SEA weighted digraph,and the K dominant paths（ KDP） with maximum weight were the main energy transfer path. Taking a cabin model as studying object,2000 KDP were extracted from the SEA weighted digraph,and key nodes were obtained in energy transfer path by identifying the path nodes. The comparison of several noise reduction schemes verifies the validity of SEA weighted digraph method in noise control,which provides a reference for executing solution of noise reduction measure.