Prediction of structural high-frequency vibration with considering uncertainty in measurement

• Published in: Measurement : journal of the International Measurement Confederation 2023-12, Vol.223, p.113751, Article 113751
• Main Author: Song, Haiyang
• Format: Article
• Language: English
• Subjects: High-frequency vibration; Interval decomposition method; Statistical energy analysis; Uncertainty in measurement
• ISSN: 0263-2241
• DOI: 10.1016/j.measurement.2023.113751

•The prediction of high-frequency vibration is studied.•The interval decomposition method is applied to the vibration prediction.•The effect of the measurement errors on predicted vibration is revealed. The concept of statistical energy analysis (SEA) was proposed in the early 1960′s. The word ‘statistical’ emphasizes that the studied systems are presumed to be drawn from similar design and construction that have the known distributions of their dynamical parameters. The word ‘energy’ denotes the primary variable of interest. SEA method can well be used to predict the structural high-frequency vibration energy, and it has widely been used in many engineering fields such as aerospace, shipping and machinery. In the previous studies, the effect of uncertainty caused by measurement errors of SEA parameters was not considered. In this paper, the uncertain parameters are expressed in the form of interval variables, and the interval decomposition method is applied to predict the high-frequency vibration responses. An experimental research on vibration of complex structure is carried out, and the result from experimental research is compared with that from theoretical analysis.