It can be difficult or impossible to record the loading process in some enormous structures, such as off-shore platforms, over many years of operation. Knowing the characteristics of the input random processes, it may appear promising to estimate the output characteristics using the structural dynamic equation. The spectral densities are used in the estimation of longevity using this method. Many methods for estimating fatigue damage using spectral densities are currently in the works. Is it reasonable to apply the spectral technique in the post-processing stage of machines when the prototype exists and the loading process realisation might potentially be recorded? It’s worth noting that many of the developers of those approaches’ ultimate goal is to produce outcomes that are similar to those that can be acquired straight from the RAINFLOW approach. The genuine loading procedure is examined in this research. The purpose of this work is to demonstrate some of the spectral approach’s inconsistencies. The short review with an examination of the spectrum method’s accuracy is offered in this work. The method of the digitally modelled process is introduced to demonstrate that several of the assumptions of spectral approaches are dubious. Most importantly, the author wants to know why spectral techniques experts recommend such a contentious approach of estimate.
Mechanical Engineering Research Institute of the Russian Academy of Sciences (IMASH RAN), Russia.
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