摘要
为探究统计能量参数不确定性对声振响应结果不确定性的影响规律,采用傅里叶幅值灵敏度检验法对三子系统统计能量声振模型进行参数灵敏度分析。研究结果表明:共振耦合损耗因子宽频带内的主要影响参数;非共振耦合损耗因子仅在低频段存在一定影响力;吻合效应改变临界频率下各参数对输出函数不确定性的影响程度。该方法及结论可用于鉴别声振响应结果不确定性的来源和不同参数的贡献情况,为基于统计能量分析原理的减振降噪设计提供参考。
In order to study influence laws of statistical energy parameter uncertainties on uncertainty of vibro-acoustic responses,Fourier amplitude sensitivity test(FAST)was applied to perform the parametric sensitivity analysis for a statistical energy vibro-acoustic model with three subsystems.It was shown that the most important parameter is the resonance coupling loss factor within a wide frequency band;the non-resonance coupling loss factor has a certain influence within a low frequency band;the coincidence effect changes the influence level of each parameter on the uncertainty of the output function under the critical frequency.The proposed method and conclusions could be used to identify the source of vibro-acoustic response uncertainty and contributions of different parameters.They provided a reference for designs of vibration and noise reduction based on SEA.
作者
蔡延年
于洪亮
闫锦
廖建彬
俞万能
CAI Yannian;YU Hongliang;YAN Jin;LIAO Jianbin;YU Wanneng(School of Marine Engineering,Dalian Maritime University,Dalian 116026,China;School of Marine Engineering,Jimei University,Xiamen 361021,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第19期50-55,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51608128)
福建省科技计划项目(2017H0027)
福建省海洋渔业厅(闽海洋高新[2016]18号)
关键词
统计能量分析
全局灵敏度分析
傅里叶幅值灵敏度检验法
不确定性
statistical energy analysis(SEA)
global sensitivity analysis
Fourier amplitude sensitivity test(FAST)
uncertainty
