The statistical energy analysis(SEA)method was popularly employed to handle the high-frequency dynamics problems in many engineering fields such as aerospace and shipping.The damping loss factor and coupling loss factor were the major parameters in the SEA theory,and they can usually be identified with the measured external input power and structural modal energy.The measurement errors of the input power and modal energy were not considered in the traditional parameter identification,where the accuracy of the identi-fied results was relatively low.The interval mathematics method was applied to the parameter identification in this study,and the measurement errors of the input power and modal energy were fully considered.The effects of the measurement errors on the parameter identification were revealed,and the accuracy of the identified re-sults was improved.The work can be helpful for the structure design and safety analysis.
关键词
区间数学/参数识别/统计能量分析/结构振动
Key words
interval mathematics/parameter identification/statistical energy analysis/structural vibration
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