Limitations of the Power Spectral Density as an Indicator of Test Severity
作者： Mark Paulus
DOI: 10.17764/JIET.54.2.J3761476322338W1
关键词: Mathematics 、 Smoothing 、 Random vibration 、 Shock (mechanics) 、 Natural frequency 、 Simulation 、 Vibration 、 Experimental data 、 Spectral density 、 Statistics 、 Low frequency
摘要: This paper presents a set of experimental data comparing repetitive shock (RS) vibration, single-axis electrodynamic (ED) and multi-axis ED vibration. It was found that testing is more severe than at the same level. In addition, weaknesses were in RS system low frequency. Smoothing or poor line resolution also shown to change overall severity test. A correlation between power spectral density (PSD) rate natural frequency (RFC) over wide shift. The caused initial PSD be an ineffective indicator test severity. Quantification profile can accomplished through characterization RFC.
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