论文部分内容阅读
目前飞行器高频力学环境预示主要采用有限元-统计能量混合方法,但由于缺乏模态密度、内损耗因子、耦合损耗因子等统计能量分析参数,导致声振响应预示结果不够准确,给结构和载荷设计带来了困难。文章将已有的统计能量参数获取技术应用于工程实际,通过试验获取了几种典型结构在不同安装边界下的统计能量分析参数,积累了相关的数据,为结构的精细化声振响应预示提供了输入。
However, due to the lack of statistical energy analysis parameters such as modal density, internal loss factor and coupling loss factor, the result of acoustic vibration response is not accurate enough, and the structure and load Design has brought difficulties. In this paper, the existing statistical energy parameter acquisition technology is applied to engineering practice. The statistical energy analysis parameters of several typical structures under different installation boundaries are obtained through experiments, and the relevant data are accumulated to provide the structure for the refinement of the acoustic vibration response prediction Input