摘要
对整流罩进行宽频激励虚拟实验,测得整流罩的振动响应和声腔的声压响应;对整流罩建立统计能量模型。考虑到整流罩是多子结构系统,子系统间存在间接耦合的现象,根据虚拟实验响应、利用修正的功率入射法算出各子系统的内损耗因子、直接耦合损耗因子和间接耦合损耗因子,得到更贴近实际的结果。
The virtual experiment of the fairing excited by broadband force was conducted to the vibration response of fairing and the sound pressure of the cavity. Then the statistical energy analysis model of the faring was established. In viewof the indirect coupling between subsystems included in the fairing,factors of the damping loss,the direct coupling loss and the indirect coupling loss were calculated based on the responses of virtual experiment using the modified power injection method. The results showthat,the statistical energy analysis parameters obtained were more close to the reality.
出处
《沈阳航空航天大学学报》
2016年第4期38-42,共5页
Journal of Shenyang Aerospace University
关键词
统计能量分析
整流罩
内损耗因子
耦合损耗因子
statistical energy analysis
fairing
damping loss factor
coupling loss factor
